U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject term dieback Remove constraint Subject term: dieback Subject term drought Remove constraint Subject term: drought Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

298  Search Results

« Previous | 1 - 100 of 298 |
Number of results to display per page

Search Results

1. Effect of Dry Season Drought on Uptake of Radioactive Phosporous by Surface Roots of the Oil Palm (Elaeis guineensis Jacq.)

Author:
St. C. M. Forde
Source:
Agronomy journal 1972 v.64 no.5 pp. 622-623
ISSN:
0002-1962
Subject:
Elaeis guineensis; dieback; drought; dry season; irrigation; leaves; phosphorus; roots; soil water; Nigeria
Abstract:
... The hypothesis that the feeding roots of the oil palm (Elaeis guineensis Jacq.) die back because of the effects of pronounced dry season drought in Nigeria was tested using radioactive T as a tracer to study P uptake as influenced by different levels of soil moisture. Two trials were carried out in 1964 and 1965, respectively, with the three treatments being: (A) no irrigation during the dry seaso ...
DOI:
10.2134/agronj1972.00021962006400050022x

2. Proposed Scenario for Dieback and Decline of Acer Saccharum in Northeastern U. S. A. and Southeastern Canada

Author:
Robert A. Gregory; Mansfield W. Williams; Betty L. Wong; Gary J. Hawley
Source:
IAWA journal v.7 no.4 pp. 357-369
ISSN:
0928-1541
Subject:
Acer saccharum subsp. saccharum; carbon; cold; defoliating insects; defoliation; dieback; drought; leaves; mortality; pathogens; photosynthesis; pollutants; roots; shoots; temperature; trees; winter; wood anatomy; Canada; Northeastern United States
Abstract:
... A sequence of events is presented that may explain the reported decline of sugar maple trees in the Northeastern United States and Southeastern Canada. The primary factor, caused by defoliation, is a severe reduction in reserve carbohydrates, especially in roots, at the beginning of the leafless period. In this respect, la te defoliators - those that defoliate in late July and early August - are m ...
DOI:
10.1163/22941932-90001006

3. Cold‐induced dieback of montane spruce forests in the Swedish Scandes – a modern analogue of paleoenvironmental processes

Author:
LEIF KULLMAN
Source:
new phytologist 1989 v.113 no.3 pp. 377-389
ISSN:
0028-646X
Subject:
Holocene epoch; Picea abies; age structure; altitude; biogeography; boreal forests; climate; cold; cooling; dieback; drought; forest succession; frost; landscapes; leaves; paleoecology; snow; soil; spring; storms; wind; Scandinavia
Abstract:
... In 1987 particularly, but also in 1988, primaeval montane coniferous forests of northern Scandinavia experienced needle loss on an unprecedented scale, which affected the character of the entire landscape in certain regions. This study elucidates the dieback event For Norway spruce [Picea abies (L.) Karst.] in an area of the Swedish Scandes. The study includes visual assessment of percentage needl ...
DOI:
10.1111/j.1469-8137.1989.tb02416.x

4. Ecophysiology of xerophytic and halophytic vegetation of a coastal alluvial plain in northern Venezuela: II. Cactaceae

Author:
U. LÜTTGE; E. MEDINA; W. J. CRAM; H. S. J. LEE; M. POPP; J. A. C. SMITH
Source:
new phytologist 1989 v.111 no.2 pp. 245-251
ISSN:
0028-646X
Subject:
Crassulacean acid metabolism; Pereskia; alluvial plains; cacti and succulents; carbon dioxide; dieback; drought; dry season; ecophysiology; freshwater; halophytes; salinity; stomatal movement; vegetation; wet season; Venezuela
Abstract:
... In an ecophysiological field investigation of plant communities of vegetation islands of an alluvial plain in northern Venezuela the members of the Cactaceae, Pereskia guamacho, and a columnar ceroid cactus, Subpilosocereus ottonis, were studied. The alluvial plain was flooded by fresh water in the rainy season in November/December 1985 and was dry and saline in the dry season in March/April 1986. ...
DOI:
10.1111/j.1469-8137.1989.tb00689.x

5. Effects of irrigation and artificial drought on the growth and health of Pinus radiata near Canberra, A.C.T

Author:
Snowdon, P.; Waring, H.D.
Source:
Australian forestry 1991 v.54 no.3 pp. 174-186
ISSN:
0004-9158
Subject:
diameter; Pinus radiata; irrigation; models; plant characteristics; drought; height; water stress; seasonal variation; forest plantations; dieback; stand basal area; Australian Capital Territory
DOI:
10.1080/00049158.1991.10674574

6. Etiology of sugar maple decline in four Pennsylvania stands

Author:
Kolb, T.E.; McCormick, L.H.
Source:
Canadian journal of forest research = 1993 v.23 no.11 pp. 2395-2402
ISSN:
0045-5067
Subject:
etiology; growth rings; insect pests; decline; nutrient deficiencies; drought; dieback; Acer saccharum; stand basal area; climatic factors; Pennsylvania
Abstract:
... Tree-ring analysis was used to study historical patterns of basal area increment (BAI) by healthy (0-5% dieback) and declined (greater than 30% dieback) overstory sugar maples (Acer saccharum Marsh.) in four stands in Pennsylvania. The objectives were to establish if and when BAI decreased in healthy and declined trees and to identify causal factors associated with decreased BAI. Reduction in BAI ...
DOI:
10.1139/x93-296

7. Drought Tolerance and Xylem Embolism in Co‐Occurring Species of Coastal Sage and Chaparral

Author:
Kimberley J. Kolb; Stephen D. Davis
Source:
Ecology 1994 v.75 no.3 pp. 648-659
ISSN:
0012-9658
Subject:
Ceanothus; Salvia; branches; chaparral; dieback; drought; drought tolerance; embolism; hydraulic conductivity; irrigation; leaves; mountains; plant communities; seasonal variation; shrubs; spring; summer; water stress; woody plants; xylem vessels; xylem water potential; California
Abstract:
... Some species of coastal sage and chaparral shrubs of California are extremely tolerant of tissue dehydration, surviving water potentials as low as —9 MPa during dry summer months. Such low water potentials (high tensions on xylem water) are known to cause severe embolism formation in the xylem vessels of woody plants, blocking water transport and potentially causing shoot dieback. Thus drought har ...
DOI:
10.2307/1941723

8. Increased soil nitrate losses under mature sugar maple trees affected by experimentally induced deep frost

Author:
Boutin, R.; Robitallie, G.
Source:
Canadian journal of forest research = 1995 v.25 no.4 pp. 588-602
ISSN:
0045-5067
Subject:
soil temperature; soil solution; acid deposition; nitrification; drought; water stress; soil water; forest soils; dieback; Acer saccharum; nitrates; Quebec
Abstract:
... This work reports and discusses data gathered during soil solution monitoring that was part of an experiment conducted in the Duchesnay Experimental Forest (Quebec, Canada) to study the effects of induced deep frost, superficial frost, and superficial frost plus drought on mature sugar maple trees (Acer saccharum Marsh.). Frost treatment was applied by preventing snow from accumulating under the c ...
DOI:
10.1139/x95-066

9. Temporal and spatial patterns in drought-related tree dieback in Australian savanna

Author:
Fensham, R.J.; Holman, J.E.
Source:
Journal of applied ecology 1999 v.36 no.6 pp. 1035-1050
ISSN:
0021-8901
Subject:
Eucalyptus; dieback; drought; savannas; meteorological data; spatial distribution; temporal variation; range management; Queensland
DOI:
10.1046/j.1365-2664.1999.00460.x

10. Patch dieback of Colophospermum mopane in a dysfunctional semi‐arid African savanna

Author:
Shaun D. Macgregor; Timothy G. O'Connor
Source:
Austral ecology 2002 v.27 no.4 pp. 385-395
ISSN:
1442-9985
Subject:
Colophospermum mopane; ranching; sediments; sandy soils; topography; soil chemistry; soil quality; water requirement; drought; livestock; trees; sodium; savannas; dieback; stand basal area; tree mortality; mortality; vegetation structure; South Africa
Abstract:
... Patch dieback occurred in an almost monospecific Colophospermum mopane (Kirk ex Benth.) Kirk ex J. Léonard woodland in the Northern Province, South Africa, following severe droughts in 1988–1989 and 1991–1992. Discrete patches of dieback and adjacent paired areas of ‘healthy’ vegetation lost an average of 87 and 13% of basal area to mortality, respectively. Whole trees mostly died on ‘d ...
DOI:
10.1046/j.1442-9993.2002.01192.x

11. Effects of a severe drought on growth and wood anatomical properties of quercus faginea

Author:
Leyre Corcuera; Jesús Julio Camarero; Eustaquio Gil-Pelegrín
Source:
IAWA journal v.25 no.2 pp. 185-204
ISSN:
0928-1541
Subject:
Quercus faginea; atmospheric precipitation; defoliation; dieback; drought; earlywood; evapotranspiration; internode length; latewood; trees; Spain
Abstract:
... We studied the growth response to drought of a Quercus faginea Lam. stand in a xeric site in NE Spain, that experienced an intense defoliation in 1993–94. This event coincided with very low precipitation from November to February, the period when total monthly precipitation exceeds evapotranspiration. We evaluated the effects of November–February precipitation (recharge precipitation, RP) on inter ...
DOI:
10.1163/22941932-90000360

12. Predicting landscape patterns of aspen dieback: mechanisms and knowledge gaps

Author:
Frey, B.R.; Lieffers, V.J.; Hogg, E.H.; Landhausser, S.M.
Source:
Canadian journal of forest research 2004 v.34 no.7 pp. 1379-1390
ISSN:
0045-5067
Subject:
drought; tree diseases; plant pathogenic fungi; dieback; stand structure; vigor; fungal diseases of plants; forest stands; mature plants; forest decline; forest trees; forest-wildlife relations; defoliation; environmental models; phytophagous insects; forest succession; freeze-thaw cycles; Populus tremuloides; environmental impact; tree damage; North America
Abstract:
... Sudden dieback and deterioration of mature aspen stands is commonly observed throughout North America. This dieback process has tremendous ecological and economic importance, yet remains poorly understood. This paper summarizes our understanding of aspen dieback in North America, identifies potential processes that contribute to reduced vigour and dieback of aspen stands, and examines the scales ( ...
DOI:
10.1139/x04-062

13. Species responses to experimentally induced habitat changes in a Corynephorus grassland

Author:
Hasse Thilo; Daniëëls Fred
Source:
Journal of vegetation science 2006 v.17 no.2 pp. 135-146
ISSN:
1100-9233
Subject:
Cladonia; Corynephorus; Polytrichum; Spergula; analysis of variance; dieback; drought; grasses; grasslands; habitats; lichens; mosses and liverworts; nitrogen; sand; species diversity; Netherlands
Abstract:
... Question: To which extent do external ecological factors effect Corynephorus grassland vegetation?Location: Central Netherlands.Methods: We implemented different treatments (sand deposition, litter deposition, nitrogen input, mechanical disturbance, control) in permanent plots representing different successional phases in Corynephorus grassland. Plots were recorded just before the treatments and d ...
DOI:
10.1658/1100-9233(2006)17[135:SRTEIH]2.0.CO;2

14. Apparent climatically induced increase of tree mortality rates in a temperate forest

Author:
van Mantgem, Phillip J.; Stephenson, Nathan L.
Source:
Ecology letters 2007 v.10 no.10 pp. 909-916
ISSN:
1461-023X
Subject:
Picea abies; biotic stress; climate; dieback; drought; forest types; mortality; old-growth forests; temperate forests; temperature; tree mortality; trees; water stress; Sierra Nevada (California)
Abstract:
... We provide a first detailed analysis of long-term, annual-resolution demographic trends in a temperate forest. After tracking the fates of 21 338 trees in a network of old-growth forest plots in the Sierra Nevada of California, we found that mortality rate, but not the recruitment rate, increased significantly over the 22 years of measurement (1983-2004). Mortality rates increased in both of two d ...
DOI:
10.1111/j.1461-0248.2007.01080.x
PubMed:
17845291

15. Interactions Across Spatial Scales among Forest Dieback, Fire, and Erosion in Northern New Mexico Landscapes

Author:
Allen, Craig D.
Source:
Ecosystems 2007 v.10 no.5 pp. 797-808
ISSN:
1432-9840
Subject:
anthropogenic activities; death; dieback; drought; ecosystems; fire behavior; fire regime; forests; fuels; grazing; hosts; insects; landscapes; mortality; pests; runoff; trees; watersheds; woodlands; New Mexico
Abstract:
... Ecosystem patterns and disturbance processes at one spatial scale often interact with processes at another scale, and the result of such cross-scale interactions can be nonlinear dynamics with thresholds. Examples of cross-scale pattern-process relationships and interactions among forest dieback, fire, and erosion are illustrated from northern New Mexico (USA) landscapes, where long-term studies h ...
DOI:
10.1007/s10021-007-9057-4

16. Restoring Jarrah Forest Trees after Bauxite Mining in Western Australia

Author:
Koch, John M.; Samsa, Glen P.
Source:
Restoration ecology 2007 v.15 no.s4 pp. S17
ISSN:
1061-2971
Subject:
Corymbia calophylla; drought; summer; dieback; forests; stems; stand basal area; Eucalyptus marginata; bauxite; forest trees; Phytophthora cinnamomi; mortality; coastal plains; tree growth; saplings; phosphorus fertilizers; soil types; rain; mining; overstory; Western Australia
Abstract:
... The overstory of the jarrah forest is dominated by Jarrah (Eucalyptus marginata) with a smaller proportion of Marri (Corymbia calophylla). There are also several smaller tree species in the areas where Alcoa mines. Alcoa's restoration aims to restore all these species at densities similar to the unmined forest. This paper describes the establishment, survival, and growth of these trees with partic ...
DOI:
10.1111/j.1526-100X.2007.00289.x

17. Seasonal variation in photosynthesis in six woody species with different leaf phenology in a valley savanna in southwestern China

Author:
Zhang, Jiao-Lin; Zhu, Jun-Jie; Cao, Kun-Fang
Source:
Trees 2007 v.21 no.6 pp. 631-643
ISSN:
0931-1890
Subject:
gas exchange; reactive oxygen species; drought tolerance; drought; trees; carbon; seasonal variation; dieback; reflectance; Woodfordia fruticosa; stomatal conductance; Quercus; fluorescence; phenology; Wendlandia; savannas; photosynthesis; screening; wet season; Symplocos; anthocyanins; solar radiation; heat; leaf water potential; water content; woody plants; Rhus; rivers; Buchanania; photostability; stomata; chlorophyll; China
Abstract:
... During 2003-2005, we examined the effect of seasonal drought on water status, gas exchange, δ¹³C, chlorophyll fluorescence and spectral reflectance in six woody species in a valley savanna near the Yuanjiang River (the upper Red River) in southwestern China. Three different phenological types of these woody species were compared, i.e., an evergreen species, Cyclobalanopsis helferiana, two winter-d ...
DOI:
10.1007/s00468-007-0156-9

18. Climate change and other factors influencing the decline of the Tasmanian cider gum (Eucalyptus gunnii)

Author:
Calder, J.A.; Kirkpatrick, J.B.
Source:
Australian journal of botany 2008 v.56 no.8 pp. 684-692
ISSN:
0067-1924
Subject:
geographical distribution; forest decline; forest trees; montane forests; spatial distribution; Eucalyptus gunnii; air temperature; drought; climate change; forest management; aerial photography; livestock; grazing intensity; indigenous species; wild animals; dieback; Tasmania
Abstract:
... Global climatic change has been strongly implicated in the decline of many species. However, other processes can contribute towards the extinction risk of these species. Could management of these processes arrest or slow climatically related decline? We test the relationship between climate change, and other potential threatening factors, and the decline of Eucalyptus gunnii, a tree endemic to the ...
DOI:
10.1071/BT08105

19. Effects of Extreme Weather Events on Plant Productivity and Tissue Die-Back are Modified by Community Composition

Author:
Kreyling, Juergen; Wenigmann, Mike; Beierkuhnlein, Carl; Jentsch, Anke
Source:
Ecosystems 2008 v.11 no.5 pp. 752-763
ISSN:
1432-9840
Subject:
case studies; climate change; community structure; dieback; drought; ecosystems; functional diversity; grasslands; insurance; legumes; plant communities; plant response; rain; species diversity; stress response; Central European region
Abstract:
... Extreme weather events are expected to increase in frequency and magnitude due to climate change. Their effects on vegetation are widely unknown. Here, experimental grassland and heath communities in Central Europe were exposed either to a simulated single drought or to a prolonged heavy rainfall event. The magnitude of manipulations imitated the local 100-year weather extreme according to extreme ...
DOI:
10.1007/s10021-008-9157-9

20. Impacts of a regional drought on the productivity, dieback, and biomass of western Canadian aspen forests

Author:
Hogg, E.H.; Brandt, J.P.; Michaelian, M.
Source:
Canadian journal of forest research = 2008 v.38 no.6 pp. 1373-1384
ISSN:
0045-5067
Subject:
Populus tremuloides; forest trees; coniferous forests; drought; dry environmental conditions; tree mortality; forest health; tree growth; spatial variation; climatic factors; edaphic factors; drought tolerance; dieback; boreal forests; forest mensuration; dendrochronology; growth rings; insect pests; plant stress; defoliation; Canada
Abstract:
... We examined the impacts of a severe, regional drought (2001-2002) on trembling aspen (Populus tremuloides Michx.) forests in the western Canadian interior. A total of 150 plots were established in 25 study areas as part of a regional-scale study (CIPHA). Aspen health and mortality were assessed annually during 2000-2005, and changes in stem biomass were estimated using tree-ring analysis and plot- ...
DOI:
10.1139/X08-001

21. Linking the patterns in soil moisture to leaf water potential, stomatal conductance, growth, and mortality of dominant shrubs in the Florida scrub ecosystem

Author:
Saha, Sonali; Strazisar, Theresa M.; Menges, Eric S.; Ellsworth, Patrick; Sternberg, Leonel
Source:
Plant and soil 2008 v.313 no.1-2 pp. 113-127
ISSN:
0032-079X
Subject:
Quercus; Sabal; Serenoa repens; data collection; dieback; drought; ecosystems; fecundity; leaf abscission; leaf water potential; leaves; meteorological data; mortality; oxygen; physiological response; plant growth; rain; shrublands; shrubs; soil water; soil water content; spring; stable isotopes; stomatal conductance; turgor; water uptake; wet season; Florida
Abstract:
... Patterns in soil moisture availability affect plant survival, growth and fecundity. Here we link patterns in soil moisture to physiological and demographic consequences in Florida scrub plants. We use data on different temporal scales to (1) determine critical soil moisture content that leads to loss of turgor in leaves during predawn measurements of leaf water status (Ψ crit), (2) describe the te ...
DOI:
10.1007/s11104-008-9684-3

22. The role of environmental factors in oak decline and mortality in the Ozark Highlands

Author:
Kabrick, John M.; Dey, Daniel C.; Jensen, Randy G.; Wallendorf, Michael
Source:
Forest ecology and management 2008 v.255 no.5-6 pp. 1409-1417
ISSN:
0378-1127
Subject:
Quercus; forest decline; tree mortality; climatic factors; edaphic factors; drought; soil nutrients; soil properties; dieback; topography; forest trees; montane forests; Ozarks; Missouri
Abstract:
... Oak decline is a chronic problem in Missouri Ozark forests. Red oak group species are most susceptible and decline is reportedly more severe on droughty, nutrient-poor sites. However, it was not clear whether greater decline severity was caused by poor site conditions or is simply due to the greater abundance of red oak group species found on poorer sites. We conducted this study to determine whet ...
DOI:
10.1016/j.foreco.2007.10.054

23. Beech decline in Central Europe driven by the interaction between Phytophthora infections and climatic extremes

Author:
Jung, T.
Source:
Forest pathology 2009 v.39 no.2 pp. 73-94
ISSN:
1437-4781
Subject:
Fagus sylvatica subsp. sylvatica; Nectria coccinea; Phytophthora; bark; boring insects; conifers; decay fungi; decayed wood; decline; dieback; drought; forest ecosystems; leaves; mixed stands; mortality; necrosis; nursery stock; pathogens; rain; root rot; soil sampling; stem cankers; surveys; trees; Central European region; Germany
Abstract:
... During the past decade, and in particular after the wet year 2002 and the dry year 2003, an increasing number of trees and stands of European beech (Fagus sylvatica L.) in Bavaria were showing symptoms typical for Phytophthora diseases: increased transparency and crown dieback, small-sized and often yellowish foliage, root and collar rot and aerial bleeding cankers up to stem heights of >20 m. Bet ...
DOI:
10.1111/j.1439-0329.2008.00566.x

24. Climate change, human land use and future fires in the Amazon

Author:
COCHRANE, MARK A.; BARBER, CHRISTOPHER P.
Source:
Global change biology 2009 v.15 no.3 pp. 601-612
ISSN:
1354-1013
Subject:
botanical composition; climate; climate change; climate models; dieback; drought; fire regime; fire spread; forest fires; humans; land use; landscapes; risk management; temperature
Abstract:
... There is increasing consensus that the global climate will continue to warm over the next century. The biodiversity-rich Amazon forest is a region of growing concern because many global climate model (GCM) scenarios of climate change forecast reduced precipitation and, in some cases, coupled vegetation models predict dieback of the forest. To date, fires have generally been spatially co-located wi ...
DOI:
10.1111/j.1365-2486.2008.01786.x

25. Mortality of developing floodplain forests subjected to a drying climate and water extraction

Author:
HORNER, GILLIS J.; BAKER, PATRICK J.; MAC NALLY, RALPH; CUNNINGHAM, SHAUN C.; THOMSON, JAMES R.; HAMILTON, FIONA
Source:
Global change biology 2009 v.15 no.9 pp. 2176-2186
ISSN:
1354-1013
Subject:
Eucalyptus camaldulensis; climate; density; diameter; dieback; drought; drying; floodplains; forests; mortality; plant density; planting; rain; rivers; stand density; temperature; timber production; trees; water table
Abstract:
... River regulation and water extraction have altered the hydrology of rivers resulting in substantial changes to forest structure and the dieback of floodplain forests globally. Forest mortality, due to water extraction, is likely to be exacerbated by climate change-induced droughts. In 1965, a plantation trial was established within a natural floodplain forest to examine the effect of planting dens ...
DOI:
10.1111/j.1365-2486.2009.01915.x

26. Synergistic effect of drought and chestnut blight (Cryphonectria parasitica) on growth decline of European chestnut (Castanea sativa)

Author:
Waldboth, M.; Oberhuber, W.
Source:
Forest pathology 2009 v.39 no.1 pp. 43-55
ISSN:
1437-4781
Subject:
temperature; tree growth; correlation; dieback; blight; soil water content; decline; dead wood; stand basal area; drought; trees; valleys; death; Castanea sativa; atmospheric precipitation; Cryphonectria parasitica; tree mortality; climate; fungi; Italy
Abstract:
... The chestnut blight fungus [Cryphonectria parasitica (Murill) Barr] has threatened European chestnut stands (Castanea sativa Mill.) in the 20th century, but infected trees recovered because of the appearance of hypovirulent strains. However, within a dry inner Alpine valley (Italy), blight-infected C. sativa showing various degrees of crown dieback and dead trees were found. We conducted a dendroe ...
DOI:
10.1111/j.1439-0329.2008.00562.x

27. Climate change and oak growth decline: Dendroecology and stand productivity of a Turkey oak (Quercus cerris L.) old stored coppice in Central Italy

Author:
Alfredo Di Filippo; Alfredo Alessandrini; Franco Biondi; Silvia Blasi; Luigi Portoghesi; Gianluca Piovesan
Source:
Annals of forest science 2010 v.67 no.7 pp. 706
ISSN:
1286-4560
Subject:
correlation; autumn; coppicing; decline; drought; climate change; Quercus cerris; dieback; drying; Mediterranean climate; Italy; Mediterranean region
Abstract:
... • We combined stem volume increment analysis with dendroecological tools to address two unresolved issues concerning oak dieback in Mediterranean areas: early detection of changes in stand growth, and identification of mechanisms for observed growth declines. • We reconstructed productivity of a stored coppice formed by Turkey oak (Quercus cerris) to test if its growth decline was linked to climat ...
DOI:
10.1051/forest/2010031

28. Drought negatively affects communities on a foundation tree: growth rings predict diversity

Author:
Stone, Adrian C.; Gehring, Catherine A.; Whitham, Thomas G.
Source:
Oecologia 2010 v.164 no.3 pp. 751-761
ISSN:
0029-8549
Subject:
Pinus edulis; arthropod communities; arthropods; climate change; community structure; correlation; dendrochronology; dieback; drought; growth rings; leaves; mycorrhizal fungi; plant stress; prediction; species diversity; trees; vigor; United States
Abstract:
... Understanding how communities respond to extreme climatic events is important for predicting the impact of climate change on biodiversity. The plant vigor and stress hypotheses provide a theoretical framework for understanding how arthropods respond to stress, but are rarely tested at the community level. Following a record drought, we compared the communities of arthropods on pinyon pine (Pinus e ...
DOI:
10.1007/s00442-010-1684-3

29. Drought-Induced Multifactor Decline of Scots Pine in the Pyrenees and Potential Vegetation Change by the Expansion of Co-occurring Oak Species

Author:
Galiano, L.; Martínez-Vilalta, J.; Lloret, F.
Source:
Ecosystems 2010 v.13 no.7 pp. 978-991
ISSN:
1432-9840
Subject:
Pinus sylvestris; Quercus ilex; Santalales; canopy; climate; climate change; defoliation; dieback; drought; environmental impact; forest decline; forests; linear models; mortality; risk; soil properties; stand structure; summer; trees; water stress; Iberian Peninsula; Spain
Abstract:
... Episodes of drought-induced tree dieback have been recently observed in many forest areas of the world, particularly at the dry edge of species distributions. Under climate change, those effects could signal potential vegetation shifts occurring over large geographical areas, with major impacts on ecosystem form and function. In this article, we studied the effect of a single drought episode, occu ...
DOI:
10.1007/s10021-010-9368-8

30. Response of the prairie-forest border to climate change: impacts of increasing drought may be mitigated by increasing CO₂

Author:
Wyckoff, Peter H.; Bowers, Rachel
Source:
Journal of ecology 2010 v.98 no.1 pp. 197-208
ISSN:
0022-0477
Subject:
Quercus macrocarpa; adults; carbon dioxide; climate; climate change; dieback; drought; ecotones; environmental factors; forests; growth rings; mortality; prairies; simulation models; temperature; tree mortality; trees; water use efficiency; Minnesota
Abstract:
... 1.Quercus macrocarpa (bur oak) is the dominant tree species along much of the prairie-forest border in the northern-central United States, and movement of Q. macrocarpa in response to climate change may determine the rate at which the prairie-forest ecotone shifts. To investigate likely controls over Q. macrocarpa performance at the edge of its range, we used tree rings to establish the links betw ...
DOI:
10.1111/j.1365-2745.2009.01602.x

31. Variation in woody plant mortality and dieback from severe drought among soils, plant groups, and species within a northern Arizona ecotone

Author:
Koepke, Dan F.; Kolb, Thomas E.; Adams, Henry D.
Source:
Oecologia 2010 v.163 no.4 pp. 1079-1090
ISSN:
0029-8549
Subject:
Juniperus monosperma; Pinus edulis; Pinus ponderosa; basalt; biodiversity; canopy; community structure; dieback; drought; ecosystems; ecotones; global warming; leaf area; mortality; shrubs; soil parent materials; soil types; texture; tree mortality; trees; vegetation; woody plants; Arizona
Abstract:
... Vegetation change from drought-induced mortality can alter ecosystem community structure, biodiversity, and services. Although drought-induced mortality of woody plants has increased globally with recent warming, influences of soil type, tree and shrub groups, and species are poorly understood. Following the severe 2002 drought in northern Arizona, we surveyed woody plant mortality and canopy dieb ...
DOI:
10.1007/s00442-010-1671-8
PubMed:
20532566

32. Coast live oak, Quercus agrifolia, susceptibility and response to goldspotted oak borer, Agrilus auroguttatus, injury in southern California

Author:
Tom W. Coleman; Nancy E. Grulke; Miles Daly; Cesar Godinez; Susan L. Schilling; Philip J. Riggan; Steven J. Seybold
Source:
Forest ecology and management 2011 v.261 no.11 pp. 1852-1865
ISSN:
0378-1127
Subject:
Agrilus; Quercus agrifolia; Quercus virginiana; adults; age structure; coasts; dieback; drought; growing season; invasive species; larvae; leaves; mortality; oviposition; physiological response; planting date; principal component analysis; summer; tree classes; tree growth; tree trunk; trees; turgor; water stress; water use efficiency; woodpeckers; xylem water potential; California
Abstract:
... Oak mortality is often associated with a complex of decline factors. We describe the morphological and physiological responses of coast live oak, Quercus agrifolia Née, in California to an invasive insect, the goldspotted oak borer (GSOB), Agrilus auroguttatus Schaeffer (Coleoptera: Buprestidae), and evaluate drought as a potential inciting factor. Morphological traits of 356 trees were assessed ...
DOI:
10.1016/j.foreco.2011.02.008

33. Coast live oak, Quercus agrifolia, susceptibility and response to goldspotted oak borer, Agrilus auroguttatus, injury in southern California

Author:
Coleman, Tom W.; Grulke, Nancy E.; Daly, Miles; Godinez, Cesar; Schilling, Susan L.; Riggan, Philip J.; Seybold, Steven J.
Source:
Forest ecology and management 2011 v.261 no.11 pp. 1852-1865
ISSN:
0378-1127
Subject:
Agrilus; Quercus agrifolia; adults; age structure; dieback; drought; growing season; invasive species; larvae; leaves; mortality; oviposition; physiological response; principal component analysis; summer; tree classes; tree growth; tree trunk; trees; turgor; water stress; water use efficiency; woodpeckers; xylem water potential; California
Abstract:
... Oak mortality is often associated with a complex of decline factors. We describe the morphological and physiological responses of coast live oak, Quercus agrifolia Née, in California to an invasive insect, the goldspotted oak borer (GSOB), Agrilus auroguttatus Schaeffer (Coleoptera: Buprestidae), and evaluate drought as a potential inciting factor. Morphological traits of 356 trees were assessed ...

34. Components of tree resilience: effects of successive low‐growth episodes in old ponderosa pine forests

Author:
Francisco Lloret; Eric G. Keeling; Anna Sala
Source:
Oikos 2011 v.120 no.12 pp. 1909-1920
ISSN:
0030-1299
Subject:
Pinus; climate; coniferous forests; dendrochronology; dieback; drought; forest management; growth retardation; growth rings; montane forests; mortality; temperature; tree age; tree growth; trees
Abstract:
... Recent world‐wide episodes of tree dieback have been attributed to increasing temperatures and associated drought. Because these events are likely to become more common, improved knowledge of their cumulative effects on resilience and the ability to recover pre‐disturbance conditions is important for forest management. Here we propose several indices to examine components of individual tree re ...
DOI:
10.1111/j.1600-0706.2011.19372.x

35. Diversity and pathogenicity of Botryosphaeriaceae on declining Ostrya carpinifolia in Slovenia and Italy following extreme weather conditions

Author:
Barbara Piškur; Draginja Pavlic; Bernard Slippers; Nikica Ogris; Giorgio Maresi; Michael J. Wingfield; Dušan Jurc
Source:
European journal of forest research 2011 v.130 no.2 pp. 235-249
ISSN:
1612-4669
Subject:
Botryosphaeria dothidea; Ostrya; amplified fragment length polymorphism; climate; conidia; dieback; drought; fungi; internal transcribed spacers; pathogenicity; ribosomal DNA; surveys; temperature; trees; Italy; Slovenia
Abstract:
... Unusual and extensive dieback of European hop hornbeam (Ostrya carpinifolia) has been observed in western Slovenia and northern Italy in recent years, when extreme drought and higher temperatures were recorded. A preliminary study identified Botryosphaeria dothidea as a potential causative agent of the dieback. Further characterization of intra- and interspecies diversity of Botryosphaeriaceae col ...
DOI:
10.1007/s10342-010-0424-x

36. Effect of nitrogen addition and drought on above-ground biomass of expanding tall grasses Calamagrostis epigejos and Arrhenatherum elatius

Author:
Karel Fiala; Ivan Tůma; Petr Holub
Source:
Biologia 2011 v.66 no.2 pp. 275-281
ISSN:
1336-9563
Subject:
Arrhenatherum elatius; Calamagrostis epigejos; aboveground biomass; biodiversity; biomass production; drought; field experimentation; grasses; mortality; nitrogen; plant communities; shoots; weeds
Abstract:
... Tall expansive grasses act as serious weeds since they spread intensively and are a important threat to biodiversity of various plant communities. A field experiment was set up based on three sets of paired plots, where Calamagrostis epigejos and Arrhenatherum elatius dominated and a mixture of both these tall grasses occurred. Parallel plots were treated by additional amounts of nitrogen (50 kg N ...
DOI:
10.2478/s11756-011-0001-x

37. Hydraulic failure and tree dieback are associated with high wood density in a temperate forest under extreme drought

Author:
HOFFMANN, WILLIAM A.; MARCHIN, RENÉE M.; ABIT, PAMELA; LAU, ON LEE
Source:
Global change biology 2011 v.17 no.8 pp. 2731-2742
ISSN:
1354-1013
Subject:
temperate forests; drought; trees; dieback; correlation; embolism; stomatal conductance; wood density; leaf water potential; climate change; rooting; species diversity; branches; xylem; wilting; canopy; shrubs; wood; margin of safety; stomata; United States
Abstract:
... Catastrophic hydraulic failure will likely be an important mechanism contributing to large-scale tree dieback caused by increased frequency and intensity of droughts under global climate change. To compare the susceptibility of 22 temperate deciduous tree and shrub species to hydraulic failure during a record drought in the southeastern USA, we quantified leaf desiccation, native embolism, wood de ...
DOI:
10.1111/j.1365-2486.2011.02401.x

38. Intraspecific competition between shrubs in a semi-arid savanna

Author:
Kambatuku, Jack R.; Cramer, Michael D.; Ward, David
Source:
Plant ecology 2011 v.212 no.4 pp. 701-713
ISSN:
1385-0237
Subject:
grasses; canopy; nitrogen fixation; shrubs; Senegalia mellifera; nitrogen; drought; soil; trees; carbon; growing season; interspecific competition; leaves; savannas; water stress; dieback; plant physiology; mortality; intraspecific competition; South Africa
Abstract:
... Tree-on-tree competitive interactions may be more important in affecting the distribution of the tree components of savannas than inter-specific competition with grasses. The presence of intraspecific competition is expected to negatively affect inter-tree spacing, individual size distributions and plant physiology as well as survival/mortality. In this field removal experiment on Acacia mellifera ...
DOI:
10.1007/s11258-010-9856-0

39. Massive mortality of aspen following severe drought along the southern edge of the Canadian boreal forest

Author:
MICHAELIAN, MICHAEL; HOGG, EDWARD H.; HALL, RONALD J.; ARSENAULT, ERIC
Source:
Global change biology 2011 v.17 no.6 pp. 2084-2094
ISSN:
1354-1013
Subject:
Populus tremuloides; aboveground biomass; boreal forests; carbon; climate change; cold; dieback; drought; emissions; land cover; monitoring; mortality; remote sensing; satellites; surveys; tree mortality; Canada; United States
Abstract:
... Drought-induced, regional-scale dieback of forests has emerged as a global concern that is expected to escalate under model projections of climate change. Since 2000, drought of unusual severity, extent, and duration has affected large areas of western North America, leading to regional-scale dieback of forests in the southwestern US. We report on drought impacts on forests in a region farther nor ...
DOI:
10.1111/j.1365-2486.2010.02357.x

40. Utjecaj stanišnih promjena i načina gospodarenja na sušenje obične smreke (Picea abies Karst.) u Hrvatskoj

Author:
Matić, Slavko
Source:
Croatian journal of forest engineering 2011 v.32 no.1 pp. 7-17
ISSN:
1848-9672
Subject:
Abies alba; Fagus; Picea abies; climate; dieback; drought; elderly; forests; frost; global warming; habitats; mountains; relative humidity; snow; summer; temperature; trees; uneven-aged stands; valleys; winter; Croatia
Abstract:
... Common spruce (Picea abies Karst.) is a tree species that occurs naturally in the valleys and other frost sites in high mountain regions, where it is free of serious competition of other tree species. Being resistant to frost, the winter colds of the continental and mountainous climate suit it. It is highly tolerant of winter chills of the continental and mountainous climate, it likes areas with a ...

41. Determinants of drought effects on crown condition and their relationship with depletion of carbon reserves in a Mediterranean holm oak forest

Author:
Lucía Galiano; Jordi Martínez-Vilalta; Santi Sabaté; Francisco Lloret
Source:
Tree physiology 2012 v.32 no.4 pp. 478-489
ISSN:
0829-318X
Subject:
Quercus ilex; carbon; climate change; defoliation; dieback; drought; forests; lignotubers; linear models; mortality; nutrient reserves; overstory; soil depth; stems; surveys; trees; woodlands; Spain
Abstract:
... Severe droughts may increase physiological stress on long-lived woody vegetation, occasionally leading to rapid defoliation and progressive increase in mortality of overstorey trees. Over the last few years, episodes of drought-induced tree dieback have been documented in a variety of woodlands and forests around the world. However, the factors determining tree survival and subsequent recovery are ...
DOI:
10.1093/treephys/tps025
PubMed:
22499595

42. Dieback and mortality of South African fynbos shrubs is likely driven by a novel pathogen and pathogen‐induced hydraulic failure

Author:
ANNA L. JACOBSEN; FRANCOIS ROETS; SHAYNE M. JACOBS; KAREN J. ESLER; R. BRANDON PRATT
Source:
Austral ecology 2012 v.37 no.2 pp. 227-235
ISSN:
1442-9985
Subject:
Brunia; Erica; Leucadendron; Pythium; climate change; dieback; drought; dry season; mortality; plant communities; plant pathogens; plant stress; shrubs; water stress
Abstract:
... We examined whether extensive dry season dieback and mortality in a South African fynbos community were due to drought or pathogen attack. Plant dieback and mortality have been reported elsewhere in similar plant communities suggesting potential for a widespread climatic or biotic threat to this community. We collected tissue samples from Brunia noduliflora, the dominant plant in the community, an ...
DOI:
10.1111/j.1442-9993.2011.02268.x

43. Dieback of Austrian pine – the epidemic occurrence of Sphaeropsis sapinea in southern Moravia

Author:
L. Jankovský; D. Palovčíková
Source:
Journal of Forest Science v.49 no.8 pp. 389-394
ISSN:
1212-4834
Subject:
Diplodia pinea; Gremmeniella abietina; Ips acuminatus; Leucaspis; Magdalis; Pinus nigra subsp. nigra; Pityophthorus; Sphaeropsis; dieback; drought; forests; fruits; fungi; mortality; pathogens
Abstract:
... In the course of recent years, various cases of Austrian pine dieback of all age classes have occurred in a number of localities. At all localities, Sphaeropsis shoot – killing of pine caused by Sphaeropsis sapinea (Fr.) Dyko et Sutton syn. Diplodia pinea (Desm.) Kickx. was recorded on a mass scale in declining shoots. Fruit bodies of the fungus were found on twigs, at the base of needles be ...
DOI:
10.17221/4712-jfs

44. Drought-induced tree mortality: ecological consequences, causes, and modeling

Author:
Weifeng Wang; Changhui Peng; Daniel D. Kneeshaw; Guy R. Larocque; Zhibin Luo
Source:
Environmental reviews 2012 v.20 no.2 pp. 109-121
ISSN:
1208-6053
Subject:
biosphere; carbon; carbon dioxide; climate; climate change; dieback; drought; environmental factors; environmental impact; forest decline; forest ecosystems; forests; hydrologic cycle; models; mortality; nitrogen; starvation; temperature; tree mortality; trees
Abstract:
... Drought-induced tree mortality, which rapidly alters forest ecosystem composition, structure, and function, as well as the feedbacks between the biosphere and climate, has occurred worldwide over the past few decades, and is expected to increase pervasively as climate change progresses. The objectives of this review are to (1) highlight the likely ecological consequences of drought-induced tree mo ...
DOI:
10.1139/a2012-004

45. Evidences of drought stress as a predisposing factor to Scots pine decline in Valle d’Aosta (Italy)

Author:
Giorgio Vacchiano; Matteo Garbarino; Enrico Borgogno Mondino; Renzo Motta
Source:
European journal of forest research 2012 v.131 no.4 pp. 989-1000
ISSN:
1612-4669
Subject:
Pinus sylvestris; coniferous forests; decline; dieback; drought; growing season; image analysis; moderate resolution imaging spectroradiometer; probability; solar radiation; spring; stand structure; trees; valleys; water stress; Italy
Abstract:
... Scots pine (Pinus sylvestris L.) forests of many inner Alpine valleys have recently displayed a quick loss of vitality. A decline disease has been suggested as the cause, with drought as the main predisposing factor and the additional contribution of biotic agents inciting tree dieback. This study is focused on Valle d’Aosta, a dry, inner-Alpine region in NW Italy. We inferred vitality changes bet ...
DOI:
10.1007/s10342-011-0570-9

46. Large drought‐induced aboveground live biomass losses in southern Rocky Mountain aspen forests

Author:
Cho‐Ying Huang; William R. L. Anderegg
Source:
Global change biology 2012 v.18 no.3 pp. 1016-1027
ISSN:
1354-1013
Subject:
Populus tremuloides; aboveground biomass; canopy; carbon; climate change; climatic factors; decline; dieback; digital elevation models; drought; ecosystems; emissions; forest health; forests; monitoring; mortality; remote sensing; standard deviation; temperature; topography; tree mortality; trees; Colorado
Abstract:
... Widespread drought‐induced forest mortality has been documented across multiple tree species in North America in recent decades, but it is a poorly understood component in terrestrial carbon (C) budgets. Recent severe drought in concert with elevated temperature likely triggered widespread forest mortality of trembling aspen (Populus tremuloides), the most widely distributed tree species in North ...
DOI:
10.1111/j.1365-2486.2011.02592.x

47. Nitrogen deposition increases susceptibility to drought - experimental evidence with the perennial grass Molinia caerulea (L.) Moench

Author:
Uta Friedrich; Goddert von Oheimb; Wolf-Ulrich Kriebitzsch; Kristina Schleßelmann; Malte Sebastian Weber; Werner Härdtle
Source:
Plant and soil 2012 v.353 no.1-2 pp. 59-71
ISSN:
0032-079X
Subject:
Molinia caerulea; aboveground biomass; dieback; drought; grasses; greenhouse experimentation; labeling techniques; leaves; nitrogen; nitrogen content; nitrogen fertilizers; nutrient content; primary productivity; summer
Abstract:
... AIMS: We investigated the response of the perennial grass Molinia caerulea (L.) Moench to combined effects of fertilization (N, P) and drought events. We hypothesized that N fertilization increases, and drought decreases productivity, but that N addition strengthens negative effects caused by drought. METHODS: Within a full-factorial 2-year greenhouse experiment we measured biomass productivity an ...
DOI:
10.1007/s11104-011-1008-3

48. Pinus halepensis Mill. crown development and fruiting declined with repeated drought in Mediterranean France

Author:
François Girard; Michel Vennetier; Frédéric Guibal; Christophe Corona; Samira Ouarmim; Asier Herrero
Source:
European journal of forest research 2012 v.131 no.4 pp. 919-931
ISSN:
1612-4669
Subject:
Pinus halepensis; biomass; branches; branching; climate; dieback; drought; fruiting; heat; photosynthesis; reproduction; tree growth; France
Abstract:
... The objectives of this study were to describe and quantify Aleppo pine aerial primary growth processes and to assess their relationships with climate. Primary growth (branch length growth, branching rate, polycyclism, needle number and size, fruiting), i.e. crown development and reproduction, was reconstructed for the last 16 years in Mediterranean France. From 1998 to 2007, climate has been far h ...
DOI:
10.1007/s10342-011-0565-6

49. Temperate heath plant response to dry conditions depends on growth strategy and less on physiology

Author:
K.R. Albert; J. Kongstad; I.K. Schmidt; H. Ro-Poulsen; T.N. Mikkelsen; A. Michelsen; L. van der Linden; C. Beier
Source:
Acta oecologica 2012 v.45 no. pp. 79-87
ISSN:
1146-609X
Subject:
Calluna vulgaris; Deschampsia flexuosa; aboveground biomass; carbon; climate change; dieback; drought; fecundity; grasses; leaves; nitrogen; photosynthesis; plant response; seasonal variation; shoots; shrubs; soil water; stomatal conductance; summer; vegetation cover
Abstract:
... The evidence that is currently available demonstrates that future changes in precipitation patterns will affect plant carbon uptake. However, the outcome in terms of success, productivity and fecundity depends upon individual species and different responses of various growth forms. Examination of these differences in response in dry versus rewetting conditions can be used to highlight the limitati ...
DOI:
10.1016/j.actao.2012.09.003

50. Tree regeneration in black ash (Fraxinus nigra) stands exhibiting crown dieback in Minnesota

Author:
Brian J. Palik; Michael E. Ostry; Robert C. Venette; Ebrahim Abdela
Source:
Forest ecology and management 2012 v.269 no. pp. 26-30
ISSN:
0378-1127
Subject:
Alnus; Fraxinus nigra; canopy; correlation; dead wood; decline; dieback; drought; forest stands; forest trees; mortality; overstory; saplings; seedlings; shrubs; Minnesota
Abstract:
... Crown dieback and mortality of black ash (Fraxinus nigra) has been noted across the range of the species in North America for several decades. Causes of dieback and mortality are not definitive, but may be related to spring drought or excessive moisture. Where black ash is the dominant tree species in the forest, continued dieback and mortality may result in open, non-forest systems in the future. ...
DOI:
10.1016/j.foreco.2011.12.020

51. White ash (Fraxinus americana) decline and mortality: The role of site nutrition and stress history

Author:
Alejandro A. Royo; Kathleen S. Knight
Source:
Forest ecology and management 2012 v.286 no. pp. 8-15
ISSN:
0378-1127
Subject:
Ennomos subsignaria; Fraxinus americana; cations; decline; defoliation; dieback; drought; insects; landscape position; mortality; nutrient content; nutrient deficiencies; trees; Pennsylvania
Abstract:
... Over the past century, white ash (Fraxinus americana) populations throughout its range have deteriorated as a result of declining tree health and increased mortality rates. Although co-occurring factors including site nutritional deficiencies and punctuated stress events (e.g., defoliations, drought) are hypothesized to trigger white ash decline, there are no empirical assessments of these factors ...
DOI:
10.1016/j.foreco.2012.08.049

52. The influences of climate on aspen dieback

Author:
Philip Hanna; Dominik Kulakowski
Source:
Forest ecology and management 2012 v.274 no. pp. 91-98
ISSN:
0378-1127
Subject:
Populus tremuloides; climate; dieback; drought; mortality; tree mortality; Colorado; Wyoming
Abstract:
... Understanding the links between climatic variability and tree mortality is an important goal of current ecological research, but this relationship remains poorly understood for some widespread species such as quaking aspen (Populus tremuloides Michx.). Recent observations indicate a sudden onset and rapid progression of quaking aspen dieback in the western United States, which may be climatically ...
DOI:
10.1016/j.foreco.2012.02.009

53. Climate and local geomorphic interactions drive patterns of riparian forest decline along a Mediterranean Basin river

Author:
John C. Stella; Jess Riddle; Hervé Piégay; Matthieu Gagnage; Marie-Laure Trémélo
Source:
Geomorphology 2013 v.202 no. pp. 101-114
ISSN:
0169-555X
Subject:
drought; soil depth; aerial photography; trees; watersheds; summer; dendrochronology; dieback; Populus nigra; correlation; hydrology; ecosystems; climate; basins; forest decline; gravel; riparian forests; bedrock; floodplains; tree growth; water shortages; canopy; growth rings; rivers; environmental health; streams; mining; stand basal area; France; Mediterranean region
Abstract:
... Dynamic fluvial processes strongly influence ecological communities and ecosystem health in riverine and riparian ecosystems, particularly in drought-prone regions. In these systems, there is a need to develop tools to measure impacts from local and regional hydrogeomorphic changes on the key biological and physical processes that sustain riparian ecosystem health and potential recovery. We used d ...
DOI:
10.1016/j.geomorph.2013.01.013

54. Contrasting vulnerability and resilience to drought-induced decline of densely planted vs. natural rear-edge Pinus nigra forests

Author:
Raúl Sánchez-Salguero; J. Julio Camarero; Matthias Dobbertin; Ángel Fernández-Cancio; Albert Vilà-Cabrera; Rubén D. Manzanedo; Miguel A. Zavala; Rafael M. Navarro-Cerrillo
Source:
Forest ecology and management 2013 v.310 pp. 956-967
ISSN:
0378-1127
Subject:
Pinus nigra; drought tolerance; drought; trees; dendrochronology; dieback; stand structure; vigor; coniferous forests; stress management; water stress; forest decline; tree crown; Thaumetopoea pityocampa; models; stand density; growth retardation; defoliation; temperature; environmental factors; stand basal area
Abstract:
... The southernmost European natural and planted pine forests are among the most vulnerable areas to warming-induced drought decline. Both drought stress and management factors (e.g., stand origin or reduced thinning) may induce decline by reducing the water available to trees but their relative importances have not been properly assessed. The role of stand origin – densely planted vs. naturally rege ...
DOI:
10.1016/j.foreco.2013.09.050

55. Ecophysiology of salt marsh plants and predicted responses to climate change in South Africa

Author:
P.T. Tabot; J.B. Adams
Source:
Ocean & coastal management 2013 v.80 pp. 89-99
ISSN:
0964-5691
Subject:
sediments; salt marsh plants; freshwater; submergence; sea level; salinity; Limonium; Triglochin; ecophysiology; drought; climate change; vegetation; species diversity; salt marshes; ecosystems; dieback; estuaries; South Africa
Abstract:
... Salt marshes are fringe ecosystems susceptible to physico-chemical variations and therefore ecophysiological studies are needed to predict responses to climate change. For such studies, selection of plant species across a tidal range is critical, as species responses could be used as a proxy for that of the tidal range. These responses would then inform management options for salt marshes. The res ...
DOI:
10.1016/j.ocecoaman.2013.04.003

56. Extremely low fine root biomass in Larix sibirica forests at the southern drought limit of the boreal forest

Author:
Tselmeg Chenlemuge; Dietrich Hertel; Choimaa Dulamsuren; Mookhor Khishigjargal; Christoph Leuschner; Markus Hauck
Source:
Flora 2013 v.208 no.8-9 pp. 488-496
ISSN:
0367-2530
Subject:
Larix sibirica; biomass; boreal forests; conifers; dieback; drought; roots; shoots; summer; temperature; Mongolia
Abstract:
... Mongolia's Larix sibirica forests at the southern fringe of the Eurosiberian boreal forest belt are exposed not only to very low winter temperatures, but also to frequent summer droughts. It is not completely known how Siberian larch adapts to these stressors. We examined whether (i) these forests differ in their fine root bio- and necromass from more humid boreal forests further in the North and ...
DOI:
10.1016/j.flora.2013.08.002

57. First Report of Neofusicoccum australe (Botryosphaeria australis), as a Branch Dieback Pathogen of Avocado Trees in Chile

Author:
Auger J.; Palma F.; Pérez I.; Esterio M.
Source:
Plant disease 2013 v.97 no.6 pp. 842
ISSN:
0191-2917
Subject:
Botryosphaeria; Neofusicoccum; Persea americana; abiotic stress; agar; ambient temperature; autumn; avocados; bark; branches; canopy; cold season; conidia; conifer needles; containers; cork; dieback; drought; frost injury; fungi; germination; greenhouses; inoculum; internal transcribed spacers; irrigation water; kiwifruit; necrosis; orchards; pathogenicity; pathogens; peat; phylogeny; polymerase chain reaction; pycnidia; ribosomal DNA; sand; sequence analysis; trees; winter; wood; Chile
Abstract:
... Since 2007, Chilean avocado (Persea americana Mill.) orchards have been exposed to several abiotic stress conditions, namely frost damage and drought, due to three consecutive seasons of cold winters and shortage of irrigation water. At the same time, a severe disease resulting in tree dieback of cv. Hass, specifically, was observed in north-central Chile. Symptomatic trees exhibited abundant dead ...
DOI:
10.1094/PDIS-10-12-0951-PDN

58. Genetic variation of drought-induced cavitation resistance among Pinus hartwegii populations from an altitudinal gradient

Author:
Cuauhtémoc Sáenz-Romero; Jean-Baptiste Lamy; Esperanza Loya-Rebollar; Andrés Plaza-Aguilar; Régis Burlett; Philippe Lobit; Sylvain Delzon
Source:
Acta physiologiae plantarum 2013 v.35 no.10 pp. 2905-2913
ISSN:
0137-5881
Subject:
Pinus hartwegii; altitude; branches; climate change; dieback; drought; dry environmental conditions; forest trees; genetic variation; hydraulic conductivity; seedlings; seeds; treeline; xylem; Mexico
Abstract:
... Hydraulic failure can cause massive die-back of forest trees during drought. With extreme climatic events set to become more frequent and severe due to climatic change, it is essential to study resistance to water stress-induced cavitation. We investigated the genetic differentiation for cavitation resistance among Pinus hartwegii populations, the pine species growing at the treeline in México. Op ...
DOI:
10.1007/s11738-013-1321-y

59. Impact of Prosopis invasion on a keystone tree species in the Kalahari Desert

Author:
Klaudia Schachtschneider; Edmund C. February
Source:
Plant ecology 2013 v.214 no.4 pp. 597-605
ISSN:
1385-0237
Subject:
Acacia; Prosopis glandulosa var. glandulosa; Prosopis velutina; canopy; climate; dieback; drought; introduced species; isotopes; keystone species; mortality; plant stress; rain; riparian areas; rivers; temperature; trees; water stress; Kalahari Desert; South Africa
Abstract:
... Several Prosopis species were introduced into South Africa in the last century. Since then two species, Prosopis glandulosa var. torreyana and Prosopis velutina have invaded large parts of arid southern Africa. Here, we examine the extent to which increased mortality of Acacia erioloba, a keystone species in the Kalahari Desert, can be attributed to competition for water with Prosopis. We do this ...
DOI:
10.1007/s11258-013-0192-z

60. Land clearance not dieback continues to drive tree loss in a Tasmanian rural landscape

Author:
Lynda D. Prior; Gregor J. Sanders; Kerry L. Bridle; Scott C. Nichols; Rowan Harris; David M. J. S. Bowman
Source:
Regional environmental change 2013 v.13 no.5 pp. 955-967
ISSN:
1436-3798
Subject:
canopy; image analysis; landscapes; sedimentary soils; models; drought; aerial photography; carbon sequestration; igneous rocks; trees; biodiversity; dieback; Australia
Abstract:
... Tree cover has declined markedly since European settlement in the agricultural areas of Australia due to land clearing and natural and stress-induced senescence of remnant trees combined with widespread regeneration failure. These decreases in tree cover have seldom been quantified on a landscape scale, but are important in understanding losses in carbon storage and biodiversity across large areas ...
DOI:
10.1007/s10113-012-0396-0

61. Landscape-scale assessment of tree crown dieback following extreme drought and heat in a Mediterranean eucalypt forest ecosystem

Author:
Niels Brouwers; George Matusick; Katinka Ruthrof; Thomas Lyons; Giles Hardy
Source:
Landscape ecology 2013 v.28 no.1 pp. 69-80
ISSN:
0921-2973
Subject:
Eucalyptus marginata; Mediterranean climate; canopy; dieback; drought; forest ecosystems; forests; geology; heat; landscapes; rain; soil; summer; tree crown; trees; water holding capacity; Western Australia
Abstract:
... Mediterranean regions are under increasing pressure from global climate changes. Many have experienced more frequent extreme weather events such as droughts and heatwaves, which have severe implications for the persistence of forest ecosystems. This study reports on a landscape-scale assessment investigating potential associated factors of crown dieback in dominant tree species following an extrem ...
DOI:
10.1007/s10980-012-9815-3

62. Linking a decade of forest decline in the south-west of Western Australia to bioclimatic change

Author:
Bradley Evans; Christine Stone; Paul Barber
Source:
Australian forestry 2013 v.76 no.3-4 pp. 164-172
ISSN:
2325-6087
Subject:
Eucalyptus marginata; data collection; drought; evaporation; forest decline; forestry; forests; moderate resolution imaging spectroradiometer; mortality; soil; summer; temperature; time series analysis; vegetation cover; Western Australia
Abstract:
... Summary The south-west of Western Australia has experienced severe and prolonged drought over the last three decades. This has coincided with forest declines and more recently (following the summer of 2010–2011) sudden stand mortality in the Northern jarrah forest. Over the same period the Southern jarrah and Southern karri forests remained unaffected. The bioclimatic linkage between these localis ...
DOI:
10.1080/00049158.2013.844055

63. Patterns and predictors of survival in Tsuga canadensis populations infested by the exotic pest Adelges tsugae: 20years of monitoring

Author:
Anne K. Eschtruth; Richard A. Evans; John J. Battles
Source:
Forest ecology and management 2013 v.305 pp. 195-203
ISSN:
0378-1127
Subject:
Adelges tsugae; Tsuga canadensis; decline; dieback; drought; environmental factors; forests; managers; models; monitoring; pests; prediction; risk; risk estimate; summer; survival rate; temperature; temporal variation; tree mortality; trees
Abstract:
... Infestations of the exotic pest, hemlock woolly adelgid (HWA; Adelges tsugae Annand), have resulted in the widespread decline and mortality of eastern hemlock (Tsuga canadensis (L.) Carrière) throughout much of the eastern United States. As HWA continues to spread across the range of eastern hemlock, forest managers need a better understanding of the projected rates of hemlock mortality and improv ...
DOI:
10.1016/j.foreco.2013.05.047

64. Recent declines of Populus tremuloides in North America linked to climate

Author:
James J. Worrall; Gerald E. Rehfeldt; Andreas Hamann; Edward H. Hogg; Suzanne B. Marchetti; Michael Michaelian; Laura K. Gray
Source:
Forest ecology and management 2013 v.299 pp. 35-51
ISSN:
0378-1127
Subject:
Malacosoma; Populus tremuloides; branches; climate models; climatic factors; decline; defoliation; dieback; drought; forests; fungi; habitat destruction; habitats; insect larvae; insects; mortality; summer; temperature; Mexico; United States
Abstract:
... Populus tremuloides (trembling aspen) recently experienced extensive crown thinning, branch dieback, and mortality across North America. To investigate the role of climate, we developed a range-wide bioclimate model that characterizes climatic factors controlling distribution of aspen. We also examined indices of moisture stress, insect defoliation and other factors as potential causes of the decl ...
DOI:
10.1016/j.foreco.2012.12.033

65. Shoot desiccation and hydraulic failure in temperate woody angiosperms during an extreme summer drought

Author:
Andrea Nardini; Marta Battistuzzo; Tadeja Savi
Source:
new phytologist 2013 v.200 no.2 pp. 322-329
ISSN:
0028-646X
Subject:
aquifers; carbohydrates; dieback; drought; fluid mechanics; hydraulic conductivity; summer; water potential; woodlands
Abstract:
... Plant water status and hydraulics were measured in six woody angiosperms growing in a karstic woodland, during an extreme summer drought. Our aim was to take advantage of an unusual climatic event to identify key traits related to species‐specific drought damage. The damage suffered by different species was assessed in terms of percentage of individuals showing extensive crown desiccation. Stem wa ...
DOI:
10.1111/nph.12288

66. Sudden forest canopy collapse corresponding with extreme drought and heat in a mediterranean-type eucalypt forest in southwestern Australia

Author:
George Matusick; Katinka X. Ruthrof; Niels C. Brouwers; Bernard Dell; Giles St. J. Hardy
Source:
European journal of forest research 2013 v.132 no.3 pp. 497-510
ISSN:
1612-4669
Subject:
Banksia grandis; Eucalyptus marginata; climate change; coping strategies; dieback; drought; ecosystems; forest canopy; forests; heat; mortality; stems; surveys; trees; water stress; Western Australia
Abstract:
... Drought and heat-induced forest dieback and mortality are emerging global concerns. Although Mediterranean-type forest (MTF) ecosystems are considered to be resilient to drought and other disturbances, we observed a sudden and unprecedented forest collapse in a MTF in Western Australia corresponding with record dry and heat conditions in 2010/2011. An aerial survey and subsequent field investigati ...
DOI:
10.1007/s10342-013-0690-5

67. Water relations and drought tolerance of young African tamarind (Tamarindus indica L.) trees

Author:
N. Van den Bilcke; D.J. Simbo; R. Samson
Source:
South African journal of botany 2013 v.88 pp. 352-360
ISSN:
0254-6299
Subject:
Adansonia digitata; Tamarindus indica; dieback; domestication; drought; drought tolerance; growth chambers; mortality; sap flow; seedlings; shoots; soil; tamarinds; trees; water conservation; water stress; Africa
Abstract:
... Tamarindus indica L. is an important multipurpose tree, indigenous to Africa, now introduced worldwide and known for its drought tolerance. The effects of drought on tamarinds, especially at seedling stage, are hardly investigated. However, this information is important for its conservation and domestication. In a growth chamber experiment we investigated the water relations of African tamarind se ...
DOI:
10.1016/j.sajb.2013.09.002

68. The influence of water availability and defoliation on extrafloral nectar secretion in quaking aspen (Populus tremuloides)

Author:
Jonathon R. Newman; Diane Wagner
Source:
Botany 2013 v.91 no.11 pp. 761-767
ISSN:
1916-2804
Subject:
Populus tremuloides; defoliation; dieback; drought; genetic variation; genotype; herbivores; nectar secretion; secretion; sugars; tree physiology; trees; water stress
Abstract:
... In recent years, water stress has led to widespread growth declines and dieback of several North American tree species. In addition to its direct effects on tree physiology, water stress may compromise anti-herbivore defenses. We tested whether extrafloral (EF) sugar secretion rate in Populus tremuloides Michx. (quaking aspen) increases in response to defoliation and whether water stress impairs c ...
DOI:
10.1139/cjb-2013-0147

69. The role of competition in drought related tree dieback in Persian oak (Quercus brantii) forests, central Zagros, Iran

Author:
Ahmad Hosseini; Seyed Mohsen Hosseini; Ahmad Rahmani; Davoud Azadfar
Source:
International journal of environmental sciences 2013 v.3 no.6 pp. 2208-2216
ISSN:
0976-4402
Subject:
Quercus brantii; area; correlation; dead wood; diameter; dieback; drought; environmental science; forests; height; landforms; length; mortality; principal component analysis; research; topography; tree and stand measurements; trees; Iran
Abstract:
... This research carried out to study the relationship between tree competition and Persian oak (Quercus brantii) dieback and mortality in different site conditions and stand structures in Shalam oak forest which located in north of Ilam province, western Iran. We divided study area into 20 homogenize units based on topography using GIS. Then we established 6 transect with a length of 100 m in each l ...
DOI:
10.6088/ijes.2013030600036

70. Abiotic and Biotic Factors Influencing Sugar Maple Health: Soils, Topography, Climate, and Defoliation

Author:
Nicholas E. Pitel; Ruth D. Yanai
Source:
Soil Science Society of America journal 2014 v.78 no.6 pp. 2061-2070
ISSN:
0361-5995
Subject:
A horizons; Acer saccharum subsp. saccharum; B horizons; Malacosoma disstria; biotic factors; calcium; cations; chemical bases; climate; cold; defoliating insects; defoliation; dieback; drought; hardwood forests; keystone species; magnesium; microrelief; mortality; temperature; winter; Allegheny Mountain region; Canada; Massachusetts; New York; Vermont
Abstract:
... Sugar maple (Acer saccharum Marsh.), a keystone species of northern hardwood forests, is susceptible to decline, especially on sites low in the soil base cations calcium (Ca) and magnesium (Mg). A common stressor of sugar maple is forest tent caterpillar (FTC; Malacosoma disstria Hübner), an indigenous defoliator. The recent outbreak of FTC (2002–2007) affected 600,000 ha of forest in the northeas ...
DOI:
10.2136/sssaj2014.06.0240

71. Benthic primary production and nitrogen cycling in Spartina alterniflora marshes: effect of restoration after acute dieback

Author:
Peter Baas; Mark W. Hester; Samantha B. Joye
Source:
Biogeochemistry 2014 v.117 no.2-3 pp. 511-524
ISSN:
0168-2563
Subject:
Spartina alterniflora; biogeochemical cycles; correlation; denitrification; dieback; drought; ecosystems; marshes; nitrification; nitrogen; nitrogen fixation; primary productivity; spatial distribution; summer; Georgia; Louisiana
Abstract:
... The sudden and massive Spartina alterniflora dieback at the turn of the millennium generated numerous unanswered questions regarding its mechanistic causes and consequences. This study, conducted during 2007–2008, aimed to elucidate mechanisms of recovery and determine whether recovery was accelerated by replanting efforts. The onset of a severe drought during the summer of 2007, however, provided ...
DOI:
10.1007/s10533-013-9897-2

72. Coastal and interior Douglas-fir provenances differ in growth performance and response to drought episodes at adult age

Author:
Anne-Sophie Sergent; Nathalie Bréda; Léopoldo Sanchez; Jean-Charles Bastein; Philippe Rozenberg
Source:
Annals of forest science 2014 v.71 no.6 pp. 709-720
ISSN:
1286-4560
Subject:
drought; trees; dieback; adults; wood density; planting; screening; geographical distribution; heat; models; climate change; soil water; growth retardation; growth performance; provenance; wood; Pseudotsuga menziesii; California; France; Oregon; British Columbia; New Mexico
Abstract:
... CONTEXT : Since the 2003 drought and heat wave, Douglas-fir dieback has been reported in France in trees older than 30 years. Consequently, it is questioned whether selected Douglas-fir provenances are suited to the frequent and severe drought events which are forecast due to climate change. AIMS : Our objective was to contribute to the screening of variability in productivity and growth response ...
DOI:
10.1007/s13595-014-0393-1

73. Douglas-fir is vulnerable to exceptional and recurrent drought episodes and recovers less well on less fertile sites

Author:
Anne-Sophie Sergent; Philippe Rozenberg; Nathalie Bréda
Source:
Annals of forest science 2014 v.71 no.6 pp. 697-708
ISSN:
1286-4560
Subject:
Pseudotsuga menziesii; climate; climate change; decline; dieback; drought; heat; nitrogen; soil water deficit; stand characteristics; trees; water content; water shortages; France
Abstract:
... CONTEXT: Since the 2003 drought and heat wave, there have been many reports of Douglas-fir decline and dieback in France. Given the climate change that is predicted, more frequent drought episodes could induce recurrent decline processes. The nature and background of this threat requires a careful assessment. AIMS: The objectives of this study were: (1) to test the hypothesis that the major climat ...
DOI:
10.1007/s13595-012-0220-5

74. Drought-induced decline and mortality of silver fir differ among three sites in Southern France

Author:
Maxime Cailleret; Marie Nourtier; Annabelle Amm; Marion Durand-Gillmann; Hendrik Davi
Source:
Annals of forest science 2014 v.71 no.6 pp. 643-657
ISSN:
1286-4560
Subject:
Abies alba; altitude; dead wood; decline; dieback; drought; forests; growth rings; mortality; probability; soil; summer; tree crown; tree growth; tree mortality; trees; France; Mediterranean region
Abstract:
... CONTEXT : In the Mediterranean area, numerous decline and mortality processes have been reported during recent decades, affecting forest dynamics. They are likely due to increases in summer drought severity and therefore especially affect drought-sensitive species, such as silver fir (Abies alba Mill.). AIMS AND METHODS : To understand the relationships between tree growth, crown condition and mor ...
DOI:
10.1007/s13595-013-0265-0

75. Influence of tree cover on herbaceous layer development and carbon and water fluxes in a Portuguese cork-oak woodland

Author:
Maren Dubbert; Alexander Mosena; Arndt Piayda; Matthias Cuntz; Alexandra Cristina Correia; Joao Santos Pereira; Christiane Werner
Source:
Acta oecologica 2014 v.59 pp. 35-45
ISSN:
1146-609X
Subject:
aboveground biomass; biogeography; carbon; dieback; drought; ecosystems; evapotranspiration; forbs; grasses; ground vegetation; herbaceous plants; interspecific competition; longevity; microclimate; nitrates; nitrogen fixation; photosynthetically active radiation; soil temperature; species diversity; spring; summer; trees; understory; woodlands; Portugal
Abstract:
... Facilitation and competition between different vegetation layers may have a large impact on small-scale vegetation development. We propose that this should not only influence overall herbaceous layer yield but also species distribution and understory longevity, and hence the ecosystems carbon uptake capacity especially during spring. We analyzed the effects of trees on microclimate and soil proper ...
DOI:
10.1016/j.actao.2014.05.007

76. Interactions of sapsuckers and Cytospora canker can facilitate decline of riparian willows

Author:
Kristen M. Kaczynski; David J. Cooper; William R. Jacobi
Source:
Botany 2014 v.92 no.7 pp. 485-493
ISSN:
1916-2804
Subject:
Alces alces; Cytospora; DNA; Salix; Valsa sordida; aerial photography; bark; decline; dieback; drought; ecosystems; forests; growing season; highlands; mortality; national parks; poisonous fungi; population dynamics; spores; stems; stream flow; temporal variation; ungulates; water stress; water table; xylem; Colorado
Abstract:
... Drought has caused large-scale plant mortality in ecosystems around the globe. Most diebacks have affected upland forest species. In the past two decades, a large-scale decline of riparian willows (Salix L.) has occurred in Rocky Mountain National Park, Colorado. We examined whether climatic or biotic factors drive and maintain the willow community decline. We compared annual growth and dieback of ...
DOI:
10.1139/cjb-2014-0019

77. Norway spruce physiological and anatomical predisposition to dieback

Author:
Rainer Hentschel; Sabine Rosner; Zachary E. Kayler; Kjell Andreassen; Isabella Børja; Svein Solberg; Ole Einar Tveito; Eckart Priesack; Arthur Gessler
Source:
Forest ecology and management 2014 v.322 pp. 27-36
ISSN:
0378-1127
Subject:
Picea abies; carbon; dieback; drought; growth performance; isotopes; leaves; oxygen; stomatal conductance; trees; water stress; water use efficiency; wood density; Norway
Abstract:
... Top dieback on Norway spruce has frequently occurred in stands of southern Norway and it is a serious threat to the productivity and stability of economically important spruce stands. The underlying dieback mechanisms are unclear; often the whole stand is not affected, but only individual trees. Drought stress is hypothesized as a crucial trigger for the onset of symptoms; therefore, we studied th ...
DOI:
10.1016/j.foreco.2014.03.007

78. Recurrent Mild Drought Events Increase Resistance Toward Extreme Drought Stress

Author:
Sabrina Backhaus; Juergen Kreyling; Kerstin Grant; Carl Beierkuhnlein; Julia Walter; Anke Jentsch
Source:
Ecosystems 2014 v.17 no.6 pp. 1068-1081
ISSN:
1432-9840
Subject:
Plantago lanceolata; Vaccinium myrtillus; biodiversity; biomass; community structure; dieback; drought; drought tolerance; epigenetics; field experimentation; grasslands; longevity; plant communities; plant response; rain; root shoot ratio; stress response; water stress; water supply
Abstract:
... The frequency and magnitude of extreme weather events such as drought are expected to increase in the future. At present, plant responses to recurrent extreme events have been sparsely examined and the role of stress history on subsequent stress response has been widely neglected. In a long-term field experiment, we investigated the response of grassland and heath communities to a very severe drou ...
DOI:
10.1007/s10021-014-9781-5

79. Reduction in browsing intensity may not compensate climate change effects on tree species composition in the Bavarian Forest National Park

Author:
Maxime Cailleret; Marco Heurich; Harald Bugmann
Source:
Forest ecology and management 2014 v.328 pp. 179-192
ISSN:
0378-1127
Subject:
seedlings; drought; trees; summer; stand composition; dieback; ungulates; Picea abies; forest reserves; browsing; equations; models; Abies alba; climate change; interspecific competition; species diversity; canopy gaps; temperature; Fagus sylvatica; climatic factors; tree mortality; national parks; forest management; forest types; stand basal area; Germany
Abstract:
... Climate change may directly induce shifts in stand-level dynamics by altering the regeneration, growth and mortality of tree species, and indirectly by modifying interspecific competition. While some experimental and simulation studies have shown that these effects can be compensated by lower browsing pressure, it is not clear how species composition and stand basal area may respond in the short a ...
DOI:
10.1016/j.foreco.2014.05.030

80. Rhododendron Decline in the Great Smoky Mountains and Surrounding Areas: Intensive Site Study of Biotic and Abiotic Parameters Associated with the Decline

Author:
Baird Richard; Wood-Jones Alicia; Varco Jac; Watson Clarence; Starrett William; Taylor Glenn; Johnson Kristine
Source:
Southeastern naturalist 2014 v.13 no.1 pp. 1-25
ISSN:
1528-7092
Subject:
Belonolaimus; Helicotylenchus; Meloidogyne; Mesocriconema; Mycena; Rhododendron maximum; bedrock; crops; dieback; drought; forest nurseries; fungi; genetic databases; national parks; nutrient content; pathogens; rhizosphere; roots; saprophytes; seedlings; soil sampling; trees; Great Smoky Mountain region; Nantahala National Forest
Abstract:
... Rhododendron dieback was continuously observed with increasing frequency on Rhododendron maximum (Rosebay Rhododendron) during the last 20 years in the southern Appalachian Mountains. The dieback was especially evident following several years of drought from 2004 to 2008 recorded in Great Smoky Mountains National Park (GRSM). With the concern that a disease epidemic could occur, a holistic study e ...
DOI:
10.1656/058.013.0101

81. Simulating impacts of water stress on woody biomass in the southern boreal region of western Canada using a dynamic vegetation model

Author:
Kuo-Hsien Chang; David T. Price; Jing M. Chen; Werner A. Kurz; Céline Boisvenue; Edward H. Hogg; T. Andrew Black; Alemu Gonsamo; Chaoyang Wu; Robbie A. Hember
Source:
Agricultural and forest meteorology 2014 v.198-199 pp. 142-154
ISSN:
0168-1923
Subject:
biomass; biosphere; boreal forests; carbon dioxide; dieback; drought; ecosystems; eddy covariance; grasslands; models; mortality; soil; soil surveys; tree mortality; water stress; water vapor; woodlands; Alberta; Saskatchewan
Abstract:
... Drought-related dieback of aspen-dominated woodland has been a persistent and possibly increasing phenomenon over recent decades in the southern boreal forests of western Canada. The Integrated BIosphere Simulator (IBIS) dynamic vegetation model was modified for Canadian ecosystems (hence “Can-IBIS”) and used to simulate effects of water stress on the woody biomass of aspen-dominated stands in the ...
DOI:
10.1016/j.agrformet.2014.07.013

82. Strong hydraulic segmentation and leaf senescence due to dehydration may trigger die-back in Nothofagus dombeyi under severe droughts: a comparison with the co-occurring Austrocedrus chilensis

Author:
Fabián G. Scholz; Sandra J. Bucci; Guillermo Goldstein
Source:
Trees 2014 v.28 no.5 pp. 1475-1487
ISSN:
0931-1890
Subject:
temperature; wilting; survival rate; abscission; winter; temperate forests; carbohydrates; drought; capacitance; Libocedrus chilensis; leaf water potential; trees; leaves; summer; water stress; dieback; conifers; Nothofagus dombeyi; South America
Abstract:
... KEY MESSAGE : Total leaf hydraulic dysfunction during severe drought could lead to die-back in N. dombeyi , while hydraulic traits of A. chilensis allow it to operate far from the threshold of total hydraulic failure. Die-back was observed in South America temperate forests during one of the most severe droughts of the 20th century (1998–1999). During this drought Austrocedrus chilensis trees surv ...
DOI:
10.1007/s00468-014-1050-x

83. A Tripartite Interaction Between Spartina alterniflora, Fusarium palustre, and the Purple Marsh Crab (Sesarma reticulatum) Contributes to Sudden Vegetation Dieback of Salt Marshes in New England

Author:
Elmer Wade H.
Source:
Phytopathology 2014 v.104 no.10 pp. 1070-1077
ISSN:
0031-949X
Subject:
Fusarium; Spartina alterniflora; additive effect; arthropods; biomass; chemotaxis; crabs; dieback; drought; grasses; greenhouses; herbivores; host plants; irrigation; littoral zone; nutrition; pathogens; roots; salt marshes; shoots; streams; vegetation; water stress; New England region
Abstract:
... Tripartite interactions are common and occur when one agent (an arthropod or pathogen) changes the host plant in a manner that alters the attack of the challenging agent. We examined herbivory from the purple marsh crab (Sesarma reticulatum) on Spartina alterniflora following exposure to drought or inoculation with Fusarium palustre in mecocosms in the greenhouse and in crab-infested creek banks a ...
DOI:
10.1094/PHYTO-08-13-0219-R

84. Vegetation Dynamics at the Upper Reaches of a Tropical Montane Forest are Driven by Disturbance Over the Past 7300 Years

Author:
Shelley Crausbay; Steffi Genderjahn; Sara Hotchkiss; Dirk Sachse; Ansgar Kahmen; Stefan K. Arndt
Source:
Arctic, antarctic, and alpine research 2014 v.46 no.4 pp. 787-799
ISSN:
1938-4246
Subject:
Cibotium; Sadleria; alkanes; biomarkers; charcoal; dieback; drought; epiphytes; fire regime; grasslands; lakes; landscapes; lianas; pollen; sediments; shrublands; species diversity; trade winds; tree ferns; tropical montane cloud forests; Hawaii
Abstract:
... We assessed tropical montane cloud forest (TMCF) sensitivity to natural disturbance by drought, fire, and dieback with a 7300-year-long paleorecord. We analyzed pollen assemblages, charcoal accumulation rates, and higher plant biomarker compounds (average chain length [ACL] of n-alkanes) in sediments from Wai'ānapanapa, a small lake near the upper forest limit and the mean trade wind inversion (TW ...
DOI:
10.1657/1938-4246-46.4.787

85. model for estimation of the potential yield of walnut trees

Author:
D. Hassani; R. Dastjerdi; A. Soleimani; M. Jaffaraghaei; R. Rezaee; K. Vahdati; A. Dehghani; H. Hadadnejhad; M. Asefnokhostin; M. Mozaffari; S. Eskandari
Source:
Acta horticulturae 2013 v. no.1050 pp. 407-412
ISSN:
0567-7572
Subject:
canopy; crop damage; crop yield; dieback; disasters; drought; flowering; frost; hail; insurance; model validation; models; orchards; pests; planting; shoots; soil quality; tree damage; trees; walnuts; water quality; Iran
Abstract:
... Walnut trees are subject to damage of several detrimental agents including frost, hail, drought, pest and diseases. Insurance of walnut trees against these factors is necessary to alleviate damages caused by these disasters. Accurate estimate of amount of yield is necessary previous to damages. Therefore, developing of an efficient model to estimate yield and crop damage has specific importance. I ...

86. Are outbreaks of cambium‐feeding beetles generated by nutritionally enhanced phloem of drought‐stressed trees?

Author:
T. C. R. White
Source:
Journal of applied entomology 2015 v.139 no.8 pp. 567-578
ISSN:
0931-2048
Subject:
Coleoptera; dieback; drought; insect physiology; insects; larvae; nutrients; phloem; planting; trees; water stress
Abstract:
... Outbreaks of cambium‐feeding beetles follow droughts, becoming most severe in overmature trees and those growing on stressful sites or planted beyond their natural range. Outbreaks develop from small endemic populations confined to a few senescing or damaged trees and expand into neighbouring trees that become newly stressed as a drought intensifies, eventually coalescing as a full‐blown outbreak. ...
DOI:
10.1111/jen.12195

87. Climate impacts on radial growth and vegetation activity of two co-existing Mediterranean pine species

Author:
Edmond Pasho; Arben Q. Alla
Source:
Canadian journal of forest research = 2015 v.45 no.12 pp. 1748-1756
ISSN:
0045-5067
Subject:
Pinus halepensis; Pinus pinea; atmospheric precipitation; autumn; climate; dieback; drought; earlywood; evapotranspiration; latewood; mixed forests; normalized difference vegetation index; spring; summer; temperature; tree growth; trees; water stress; Albania
Abstract:
... Improved knowledge of the time scales at which drought stress mostly influences tree growth is crucial for the early detection of forest dieback. This study aimed to evaluate the impact of climate (temperature and precipitation) on vegetation activity (normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI)) of Pinus halepensis Mill. and Pinus pinea L. mixed forest locate ...
DOI:
10.1139/cjfr-2015-0146

88. Drought‐induced xylem cavitation and hydraulic deterioration: risk factors for urban trees under climate change?

Author:
Tadeja Savi; Stefano Bertuzzi; Salvatore Branca; Mauro Tretiach; Andrea Nardini
Source:
new phytologist 2015 v.205 no.3 pp. 1106-1116
ISSN:
0028-646X
Subject:
Quercus ilex; air; chronic exposure; dieback; drought; embolism; gas exchange; global warming; mortality; risk factors; seasonal variation; street trees; towns; water potential; water stress; xylem
Abstract:
... Urban trees help towns to cope with climate warming by cooling both air and surfaces. The challenges imposed by the urban environment, with special reference to low water availability due to the presence of extensive pavements, result in high rates of mortality of street trees, that can be increased by climatic extremes. We investigated the water relations and xylem hydraulic safety/efficiency of ...
DOI:
10.1111/nph.13112

89. Drought‐related tree mortality: addressing the gaps in understanding and prediction

Author:
Patrick Meir; Maurizio Mencuccini; Roderick C. Dewar
Source:
new phytologist 2015 v.207 no.1 pp. 28-33
ISSN:
0028-646X
Subject:
biogeochemical cycles; climate; dieback; drought; forests; mechanistic models; plant ecology; prediction; probabilistic models; species diversity; tree mortality
Abstract:
... 28 I. 28 II. 29 III. 30 IV. 31 31 References 31 SUMMARY: Increased tree mortality during and after drought has become a research focus in recent years. This focus has been driven by: the realisation that drought‐related tree mortality is more widespread than previously thought; the predicted increase in the frequency of climate extremes this century; and the recognition that current vegetation mod ...
DOI:
10.1111/nph.13382

90. Early Differential Responses of Co-dominant Canopy Species to Sudden and Severe Drought in a Mediterranean-climate Type Forest

Author:
Katinka X. Ruthrof; George Matusick; Giles E. St. J. Hardy
Source:
Forests 2015 v.6 no.6 pp. 2082-2091
ISSN:
1999-4907
Subject:
Corymbia calophylla; Eucalyptus marginata; Mediterranean climate; botanical composition; canopy; dieback; drought; forest damage; forests; trees; Australia
Abstract:
... Globally, drought and heat-induced forest disturbance is garnering increasing concern. Species from Mediterranean forests have resistance and resilience mechanisms to cope with drought and differences in these ecological strategies will profoundly influence vegetation composition in response to drought. Our aim was to contrast the early response of two co-occurring forest species, Eucalyptus margi ...
DOI:
10.3390/f6062082

91. Early indications of drought impacts on forests in the southeastern United States

Author:
Michael K. Crosby; Zhaofei Fan; Martin A. Spetich; Theodor D. Leininger; Xingang Fan
Source:
Forestry chronicle 2015 v.91 no.4 pp. 376-383
ISSN:
0015-7546
Subject:
climate change; climatic factors; dieback; drought; ecoregions; ecosystems; forest health; forest types; hardwood; models; monitoring; regression analysis; trees
Abstract:
... In the southeastern United States, drought can pose a significant threat to forests by reducing the amount of available water, thereby stressing trees. Destructive changes in crown conditions provide the first visible indication of a problem in a forested area, making it a useful indicator for problems within an ecosystem. Forest Health and Monitoring (FHM) and Palmer's Drought Severity Index (PDS ...
DOI:
10.5558/tfc2015-067

92. Factors affecting fall down rates of dead aspen (Populus tremuloides) biomass following severe drought in west‐central Canada

Author:
Edward H. (Ted) Hogg; Michael Michaelian
Source:
Global change biology 2015 v.21 no.5 pp. 1968-1979
ISSN:
1354-1013
Subject:
Phellinus; Populus tremuloides; biomass; boring insects; carbon; correlation; dead wood; death; decay fungi; die-off; dieback; drought; emissions; equations; forests; remote sensing; stems; surveys; tree mortality; trees; Canada
Abstract:
... Increases in mortality of trembling aspen (Populus tremuloides Michx.) have been recorded across large areas of western North America following recent periods of exceptionally severe drought. The resultant increase in standing, dead tree biomass represents a significant potential source of carbon emissions to the atmosphere, but the timing of emissions is partially driven by dead‐wood dynamics whi ...
DOI:
10.1111/gcb.12805

93. Influence of climate on the growth of quaking aspen (Populus tremuloides) in Colorado and southern Wyoming

Author:
M.M. Dudley; J. Negron; N.A. Tisserat; W.D. Shepperd; W.R. Jacobi
Source:
Canadian journal of forest research 2015 v.45 no.11 pp. 1546-1563
ISSN:
0045-5067
Subject:
Populus tremuloides; adults; atmospheric precipitation; bark beetles; canopy; climate; dieback; growth models; national forests; summer; surveys; temperature; tree growth; trees; Colorado; Wyoming
Abstract:
... We analyzed a series of increment cores collected from 260 adult dominant or co-dominant quaking aspen (Populus tremuloides Michx.) trees from national forests across Colorado and southern Wyoming in 2009 and 2010. Half of the cores were collected from trees in stands with a high amount of crown dieback, and half were from lightly damaged stands. We define the level of stand damage based on stand ...
DOI:
10.1139/cjfr-2015-0092

94. Is drought‐induced forest dieback globally increasing?

Author:
Jörg Steinkamp; Thomas Hickler; David Gibson
Source:
journal of ecology 2015 v.103 no.1 pp. 31-43
ISSN:
0022-0477
Subject:
climate; data collection; dieback; drought; dry forests; drying; heat stress; models; mortality; soil; water stress
Abstract:
... Recently, it has been suggested that forest mortality has been generally increasing because of increasing drought and heat stress. But it is unclear if the observations at the investigated forest sites and regions are representative of forests globally and it has not been tested whether forest models are capable of reproducing these observations. We analysed historical climate data and used a dyna ...
DOI:
10.1111/1365-2745.12335

95. Laboratory experiments with growth potential of Cenangium ferruginosum tested on natural nutrition soils

Author:
Andrej Kunca; Roman Leontovyč
Source:
Lesnicky casopis 2015 v.59 no.1 pp. 44-49
ISSN:
0323-1046
Subject:
Cenangium; Pinus nigra; Sphaeropsis; bark; bark beetles; branches; dieback; ingestion; laboratory experimentation; leaves; necrosis; nutrition; phytophagous insects; root rot; soil; soil fertility; spring; trees; Slovakia
Abstract:
... Serious pine dieback was reported in early spring from several localities in Slovakia in 2012. Needle necrosis, bark necrosis and twig cankers were the most conspicuous symptoms on diseased trees. There were no or at least not significant damages caused by bark beetles, leaf eating insects, root rots neither tracheomycosis. We also excluded Sphaeropsis sapinea (Fr.) Dyko & B. Sutton as the main pe ...
DOI:
10.2478/forj-2014-0022

96. Outbreak of Phoracantha semipunctata in Response to Severe Drought in a Mediterranean Eucalyptus Forest

Author:
Stephen Seaton; George Matusick; Katinka X. Ruthrof; Giles E. St. J. Hardy
Source:
Forests 2015 v.6 no.11 pp. 3868-3881
ISSN:
1999-4907
Subject:
Eucalyptus marginata; Mediterranean climate; Phoracantha semipunctata; canopy; dieback; drought; drying; ecosystems; forests; habitats; trees; water stress; Australia
Abstract:
... Extreme climatic events, including droughts and heatwaves, can trigger outbreaks of woodboring beetles by compromising host defenses and creating habitat conducive for beetle development. As the frequency, intensity, and duration of droughts are likely to increase in the future, beetle outbreaks are expected to become more common. The combination of drought and beetle outbreaks has the potential t ...
DOI:
10.3390/f6113868

97. Past logging, drought and pathogens interact and contribute to forest dieback

Author:
Gabriel Sangüesa-Barreda; J. Julio Camarero; Jonàs Oliva; Fernando Montes; Antonio Gazol
Source:
Agricultural and forest meteorology 2015 v.208 pp. 85-94
ISSN:
0168-1923
Subject:
logging; Heterobasidion; Abies alba; drought; global change; pathogens; trees; fungi; water stress; dieback; Amylostereum; stand basal area; climate; forests
Abstract:
... Forest dieback is one of the most widespread responses to global-change drivers, such as climate warming-related drought stress and the spread of pathogens. Although both climatic and biotic stressors have been studied separately, much less is known on how drought and pathogens interact and induce dieback, particularly in formerly used forests. We determine the roles played by each of those driver ...
DOI:
10.1016/j.agrformet.2015.04.011

98. Reduced growth sensitivity to climate in bark-beetle infested Aleppo pines: Connecting climatic and biotic drivers of forest dieback

Author:
Gabriel Sangüesa-Barreda; Juan Carlos Linares; J. Julio Camarero
Source:
Forest ecology and management 2015 v.357 pp. 126-137
ISSN:
0378-1127
Subject:
tree growth; bark beetles; isotopes; tree mortality; water use efficiency; Pinus halepensis; drought; Orthotomicus erosus; growing season; trees; death; dieback; stand basal area; climate; mortality; Tomicus piniperda; forests
Abstract:
... Drought and bark-beetle infestation are major and often interconnected drivers of forest dieback and tree death. These two stressors may interact and accelerate forest mortality, since warmer and drier conditions boost beetle attacks and reduce tree growth. However, the way in which drought and bark-beetle infestation interact and affect declining or dying trees is still poorly understood. To dise ...
DOI:
10.1016/j.foreco.2015.08.017

99. Satellite data as indicators of tree biomass growth and forest dieback in a Mediterranean holm oak forest

Author:
Romà Ogaya; Adrià Barbeta; Corina Başnou; Josep Peñuelas
Source:
Annals of forest science 2015 v.72 no.1 pp. 135-144
ISSN:
1286-4560
Subject:
primary productivity; moderate resolution imaging spectroradiometer; drought; trees; forest growth; remote sensing; dieback; forests; meteorological data; stems; photosynthesis; Quercus ilex; autumn; climate change; tree mortality; mortality; tree growth; evapotranspiration; vegetation index; aboveground biomass; stand basal area
Abstract:
... • CONTEXT : In the framework of climate change, decreased tree growth and enhanced mortality induced by hot and dry conditions are increasing in many forests around the world, and particularly in Mediterranean forests. • AIMS : Our aim was to estimate tree growth and mortality in a Mediterranean holm oak forest, using remote sensing data from MODIS. • METHODS : We monitored annual increases of abo ...
DOI:
10.1007/s13595-014-0408-y

100. Seedlings of two Acacia species from contrasting habitats show different photoprotective and antioxidative responses to drought and heatwaves

Author:
Agnieszka Wujeska-Klause; Gerd Bossinger; Michael Tausz
Source:
Annals of forest science 2015 v.72 no.4 pp. 403-414
ISSN:
1286-4560
Subject:
gas exchange; reactive oxygen species; seedlings; photochemistry; drought; trees; dieback; roots; glutathione; fluorescence; electron transfer; water stress; leaves; stomatal movement; Acacia melanoxylon; Calvin cycle; ascorbic acid; Acacia aneura; photosystem II; chlorophyll; habitats
Abstract:
... KEY MESSAGE : Two Acacia species adapted to contrasting habitats showed different response of photoprotective and antioxidative defence systems to imposed drought and heatwave. CONTEXT : Predicted increases in drought frequency and intense heatwaves are expected to lead to dieback of sensitive tree species. Stomatal closure restricts CO₂ input into the leaf, resulting in imbalances between light e ...
DOI:
10.1007/s13595-014-0438-5