PubAg

Main content area

You searched for: Subject mountains Remove constraint Subject: mountains
Start Over

Search

12,053  Search Results

« Previous | 1 - 20 of 12,053 |
Number of results to display per page

Search Results

1. Abandonment landscapes: user attitudes, alternative futures and land management in Castro Laboreiro, Portugal

Author:
van der Zanden, EmmaH.; Carvalho-Ribeiro, SóniaM.; Verburg, PeterH.
Source:
Regional environmental change 2018 v.18 no.5 pp. 1509-1520
ISSN:
1436-3798
Subject:
European Union; abandoned land; attitudes and opinions; case studies; emotions; environmental impact; experts; issues and policy; land management; landscape management; landscapes; mountains; photographs; planning; traditions; Portugal
Abstract:
... Land abandonment is an important process for the European Union, which primarily occurs in less productive, remote and mountainous areas with unfavourable conditions for agriculture. Future management directions of these abandonment areas are under debate, with increasing calls to adjust policies to the local characteristics, including the promotion of rewilding and the management of succession of ...
DOI:
10.1007/s10113-018-1294-x

2. Abandonment of traditional uses in mountain areas: typological thinking versus hard data in the Cantabrian Mountains (NW Spain)

Author:
Blanco-Fontao, Beatriz; Quevedo, Mario; Obeso, José Ramón
Source:
Biodiversity and conservation 2011 v.20 no.5 pp. 1133-1140
ISSN:
0960-3115
Subject:
biodiversity; birds; cattle; evolution; forest ecosystems; habitats; herding; homogenization; landscape management; montane forests; mountains; Spain
Abstract:
... Conservation policies of the European Nature 2,000 network reflect an overarching concern about alleged negative effects of abandonment of traditional uses. In particular, the abandonment of livestock herding is widely assumed to be responsible of biodiversity decreases through habitat homogenization. However, those negative effects of land abandonment on biodiversity are neither straightforward n ...
DOI:
10.1007/s10531-011-0016-1

3. A Baseline Study of Alpine Snowbed and Rill Communities On Mount Washington, Nh

Author:
Capers, Robert S.; Slack, Nancy G.
Source:
Rhodora 2016 v.118 no.976 pp. 345-381
ISSN:
0035-4902
Subject:
Bryophyta; environmental factors; global warming; lichens; mountains; nitrogen; plant communities; snowmelt; species diversity; vascular plants; New Hampshire; White Mountain National Forest
Abstract:
... Quantitative data on the abundance and frequency of vascular plants, bryophytes and lichens are lacking for alpine snowbed and rill communities in northeastern North America. Such data are needed to establish whether the communities are changing in response to climate warming, nitrogen deposition or shifts in the timing of precipitation and snowmelt. We surveyed nine sites (five snowbeds and four ...
DOI:
10.3119/16-07

4. A Bayesian modeling of wildfire probability in the Zagros Mountains, Iran

Author:
Jaafari, Abolfazl; Gholami, Davood Mafi; Zenner, Eric K.
Source:
Ecological informatics 2017 v.39 pp. 32-44
ISSN:
1574-9541
Subject:
altitude; climate; decision making; fire season; humans; infrastructure; land use planning; landscapes; models; mountains; prediction; probability; probability distribution; risk assessment; wildfires; wildland fire management; Iran
Abstract:
... The preparation of probability distribution maps is the first important step in risk assessment and wildfire management. Here we employed Weights-of-Evidence (WOE) Bayesian modeling to investigate the spatial relationship between historical fire events in the Chaharmahal-Bakhtiari Province of Iran, using a wide range of binary predictor variables (i.e., presence or absence of a variable characteri ...
DOI:
10.1016/j.ecoinf.2017.03.003

5. A Bayesian spatial assimilation scheme for snow coverage observations in a gridded snow model

Author:
Kolberg, S.; Rue, H.; Gottschalk, L.
Source:
Hydrology and earth system sciences 2006 v.10 no.3 pp. 369-381
ISSN:
1027-5606
Subject:
mathematical models; mountains; Bayesian theory; snow; watershed hydrology; runoff; hydrologic models; Norway

6. A Bayesian Spatial Model Highlights Distinct Dynamics in Deforestation from Coca and Pastures in an Andean Biodiversity Hotspot

Author:
Chadid, Maria Alejandra; Dávalos, Liliana M.; Molina, Jorge; Armenteras, Dolors
Source:
Forests 2015 v.6 no.11 pp. 3828-3846
ISSN:
1999-4907
Subject:
Bayesian theory; altitude; biodiversity; computer software; crops; deforestation; land use; mining; models; monitoring; mountains; pastures; rivers; tropical forests; Andes region; Colombia
Abstract:
... The loss of tropical forests has continued in recent decades despite wide recognition of their importance to maintaining biodiversity. Here, we examine the conversion of forests to pastures and coca crops (illicit activity) on the San Lucas Mountain Range, Colombia for 2002–2007 and 2007–2010. Land use maps and biophysical variables were used as inputs to generate land use and cover change (LUCC) ...
DOI:
10.3390/f6113828

7. Abditibacterium utsteinense sp. nov., the first cultivated member of candidate phylum FBP, isolated from ice-free Antarctic soil samples

Author:
Tahon, Guillaume; Tytgat, Bjorn; Lebbe, Liesbeth; Carlier, Aurélien; Willems, Anne
Source:
Systematic and applied microbiology 2018 v.41 no.4 pp. 279-290
ISSN:
0723-2020
Subject:
Armatimonadetes; antibiotics; bacteria; carbon; ecosystems; environmental surveys; habitats; metabolism; mountains; pH; phenotype; sequence analysis; soil sampling; toxic substances; wastewater; Antarctic region; Antarctica
Abstract:
... Most bacterial lineages are known only by molecular sequence data from environmental surveys and represent the uncultivated majority. One of these lineages, candidate phylum FBP, is widespread in extreme environments on Earth, ranging from polar and desert ecosystems to wastewater and contaminated mine sites. Here we report on the characterization of strain LMG 29911T, the first cultivated represe ...
DOI:
10.1016/j.syapm.2018.01.009

8. A beech bark disease induced change in tree species composition influences forest floor acid–base chemistry

Author:
Arthur, M.A.; Weathers, K.C.; Lovett, G.M.; Weand, M.P.; Eddy, W.C.
Source:
Canadian journal of forest research = 2017 v.47 no.7 pp. 875-882
ISSN:
1208-6037
Subject:
Acer saccharum subsp. saccharum; Fagus grandifolia; acid deposition; base saturation; beech bark disease; calcium; cation exchange capacity; chemical bases; disease course; ecosystems; exchangeable calcium; forest litter; forests; hydrogen; mortality; mountains; soil acidification; species diversity; trees; Eastern United States
Abstract:
... Beech bark disease (BBD) has demonstrable ecosystem consequences for eastern US forests stemming from American beech (Fagus grandifolia Ehrh.) mortality, often leading to increased dominance by its competitor, sugar maple (Acer saccharum Marsh.). We hypothesized that this BBD-induced shift in tree species composition leads to changes in soil acid–base chemistry, mediated through differences in lea ...
DOI:
10.1139/cjfr-2016-0341

9. A bioclimatic characterization of high elevation habitats in the Alborz mountains of Iran

Author:
Noroozi, Jalil; Körner, Christian
Source:
Alpine botany 2018 v.128 no.1 pp. 1-11
ISSN:
1664-2201
Subject:
Angiospermae; Juniperus excelsa; alpine plants; alpine vegetation; altitude; botany; climate; forests; growing season; habitats; land use; landscapes; melting; microprocessors; mountains; rain; root zone temperature; snowmelt; surveys; topographic slope; treeline; trees; Alps region; Caspian Sea; Iran
Abstract:
... The Alborz mountains in N-Iran at 36° N rise from the Caspian Sea to 5671 m a.s.l., with warm-temperate, winter-deciduous forests in the lower montane belt in northern slopes, and vast treeless terrain at higher elevation. A lack of rainfall (ca. 550 mm at high elevations) cannot explain the absence of trees. Hence, it is an open question, which parts of these mountains belong to the alpine belt. ...
DOI:
10.1007/s00035-018-0202-9
PubMed:
29576762
PubMed Central:
PMC5856880

10. A biogeographic delineation of the European Alpine System based on a cluster analysis of Carex curvula-dominated grasslands

Author:
Puşcaş, Mihai; Choler, Philippe
Source:
Flora 2012 v.207 no.3 pp. 168-178
ISSN:
0367-2530
Subject:
Carex; alpine plants; biogeography; cluster analysis; geographical distribution; grasslands; mountains; quantitative analysis; species diversity; vegetation cover; Alps region; Balkans
Abstract:
... Biogeographic delineations within the European temperate mountains remain poorly understood, as there has been little effort to assemble and analyze vegetation relevés covering Pyrenees, Alps, Carpathians and Balkans altogether. Our study tackles this issue by focusing on the widely distributed alpine acidic grasslands dominated by Carex curvula. Cluster analysis of more than 800 vegetation relev ...
DOI:
10.1016/j.flora.2012.01.002

11. A biogeographic review of Parahebe (Scrophulariaceae)

Author:
HEADS, MICHAEL
Source:
Botanical journal of the Linnean Society 1994 v.115 no.1 pp. 65-89
ISSN:
0024-4074
Subject:
Arenaria; Scrophulariaceae; islands; mountains; new combination; Australia; New Zealand; Papua New Guinea
Abstract:
... Distribution maps and notes are given for the 41 species of Parahebe sensu lata. The genus occurs in New Zealand, south-east Australia and New Guinea, with greatest diversity in New Zealand, especially in the Spenser Mountains region of South Island. A group of species with ciliate floral discs is found in north-east South Island, and also in eastern Papua New Guinea. This outer Australasian arc d ...
DOI:
10.1111/j.1095-8339.1994.tb01769.x

12. Abiotic and biotic recovery pathways of arid rangelands: Lessons from the High Atlas Mountains, Morocco

Author:
Linstädter, Anja; Baumann, Gisela
Source:
Catena 2013 v.103 pp. 3-15
ISSN:
0341-8162
Subject:
Artemisia; arid lands; biomass; dry environmental conditions; ecosystems; land use; mountains; nitrogen content; nutrient content; overgrazing; pastures; perennials; rangelands; sand; shrublands; shrubs; steppes; topsoil; Morocco
Abstract:
... Dryland rangelands are fragile ecosystems which are vulnerable to overgrazing and other forms of unsustainable land use. Their subsequent degradation is a phenomenon which results in a persistent decrease in productivity. To come to a functional understanding of degradation and restoration pathways, interactions between abiotic and biotic processes need to be disentangled. We studied soil and vege ...
DOI:
10.1016/j.catena.2012.02.002

13. Abiotic and Biotic Soil Characteristics in Old Growth Forests and Thinned or Unthinned Mature Stands in Three Regions of Oregon

Author:
Perry, David A.; Griffiths, Robert P.; Moldenke, Andrew R.; Madson, Stephanie L.
Source:
Diversity 2012 v.4 no.3 pp. 334-362
ISSN:
1424-2818
Subject:
arthropod communities; data analysis; denitrification; drought; drying; forest litter; microbial biomass; mineral soils; models; mountains; multivariate analysis; nitrogen; old-growth forests; soil fauna; soil organic matter; soil water; soil water content; species richness; summer; Oregon
Abstract:
... We compared forest floor depth, soil organic matter, soil moisture, anaerobic mineralizable nitrogen (a measure of microbial biomass), denitrification potential, and soil/litter arthropod communities among old growth, unthinned mature stands, and thinned mature stands at nine sites (each with all three stand types) distributed among three regions of Oregon. Mineral soil measurements were restricte ...
DOI:
10.3390/d4030334

14. Abiotic conditions, neighbour interactions, and the distribution of Stipa tenacissima in a semiarid mountain range

Author:
Armas, C.; Kikvidze, Z.; Pugnaire, F.I.
Source:
Journal of arid environments 2009 v.73 no.12 pp. 1084-1089
ISSN:
0140-1963
Subject:
Stipa tenacissima; grasses; steppes; mountains; semiarid zones; arid zones; geographical distribution; microclimate; soil properties; plant growth; physiological response; plant reproduction; nutrient content; climatic factors; Spain
Abstract:
... Abiotic conditions and interactions among plants are important factors determining plant geographical distributions. With the aim of analyzing the distribution of a perennial grass species in a semiarid mountain range, we experimentally tested above- and belowground effects of shrubs on the grass along a gradient of aridity. We measured growth, physiology and reproductive output of Stipa tenacissi ...
DOI:
10.1016/j.jaridenv.2009.06.012

15. Abiotic disturbances in Bulgarian mountain coniferous forests – An overview

Author:
Panayotov, Momchil; Gogushev, Georgi; Tsavkov, Evgeni; Vasileva, Pepa; Tsvetanov, Nickolay; Kulakowski, Dominik; Bebi, Peter
Source:
Forest ecology and management 2017 v.388 pp. 13-28
ISSN:
0378-1127
Subject:
Picea abies; Pinus heldreichii; Pinus peuce; Pinus sylvestris; avalanches; climate; coniferous forests; dendroclimatology; ecosystems; fires; foresters; fuels; growth rings; interviews; landscapes; montane forests; mountains; remote sensing; snow; subalpine forests; valleys; windthrow; wood; Bulgaria
Abstract:
... Disturbances are among the most important processes that shape forest dynamics and landscapes. However the historic ranges of variability (HRV) of many coniferous forests in Europe and specifically in the mountains on the Balkan Peninsula are not well understood. We present the first overview of available data on disturbance events in coniferous forests in the high mountains in southwestern Bulgar ...
DOI:
10.1016/j.foreco.2016.10.034

16. Abiotic factors modulate post-drought growth resilience of Scots pine plantations and rear-edge Scots pine and oak forests

Author:
Rubio-Cuadrado, Álvaro; Camarero, J. Julio; Aspizua, Rut; Sánchez-González, Mariola; Gil, Luis; Montes, Fernando
Source:
Dendrochronologia 2018 v.51 pp. 54-65
ISSN:
1125-7865
Subject:
Pinus sylvestris; Quercus pyrenaica; altitude; climatic factors; drought; forest ecosystems; forests; mountains; plantations; trees; Mediterranean region; Spain
Abstract:
... The proportion of planted forests in the Mediterranean Basin is one of the largest in the world. These plantations are dominated by pine species and present a series of characteristics such as low elevation, high competition or small tree size that make them more vulnerable to droughts. However, quantitative assessments of their post-drought growth resilience in accordance with species, site facto ...
DOI:
10.1016/j.dendro.2018.08.001

17. Abiotic mosaics affect seasonal variation of plant resources and influence the performance and mortality of a leaf-miner in Gambel’s oak (Quercus gambelii, Nutt.)

Author:
Yarnes, Christopher T.; Boecklen, William J.
Source:
Ecological research 2006 v.21 no.1 pp. 157-163
ISSN:
0912-3814
Subject:
Phyllonorycter; Quercus alba; Quercus gambelii; biomass; microclimate; models; mortality; mountains; nitrogen; nitrogen content; nutrient availability; parasitism; seasonal variation; tritrophic interactions
Abstract:
... Conceptual models of terrestrial trophic dynamics have emphasized the potential influence of various abiotic factors, though empirical studies have found generalities to be scarce. Progress may result through an increased use of experimental gradients in tandem with existing, natural gradients of abiotic factors that are more difficult to manipulate. Along an elevation/climatic gradient, a fertili ...
DOI:
10.1007/s11284-005-0113-2

18. A Blend of Ethanol and (−)-α-Pinene were Highly Attractive to Native Siricid Woodwasps (Siricidae, Siricinae) Infesting Conifers of the Sierra Nevada and the Allegheny Mountains

Author:
Erbilgin, Nadir; Stein, Jack D.; Acciavatti, Robert E.; Gillette, Nancy E.; Mori, Sylvia R.; Bischel, Kristi; Cale, Jonathan A.; Carvalho, Carline R.; Wood, David L.
Source:
Journal of chemical ecology 2017 v.43 no.2 pp. 172-179
ISSN:
0098-0331
Subject:
Sirex cyaneus; Sirex noctilio; Tremex columba; Urocerus; carene; chemical ecology; chemical interactions; coniferous forests; conifers; ethanol; mountains; trees; Allegheny Mountain region; California; West Virginia
Abstract:
... Woodwasps in Sirex and related genera are well-represented in North American conifer forests, but the chemical ecology of native woodwasps is limited to a few studies demonstrating their attraction to volatile host tree compounds, primarily monoterpene hydrocarbons and monoterpene alcohols. Thus, we systematically investigated woodwasp-host chemical interactions in California’s Sierra Nevada and W ...
DOI:
10.1007/s10886-016-0803-y
CHORUS:
10.1007/s10886-016-0803-y

19. Abnormal motor activity during anaesthesia in a dog: a case report

Author:
Lervik, Andreas; Haga, Henning A; Becker, Max
Source:
Acta veterinaria scandinavica 2010 v.52 no.1 pp. 632
ISSN:
1751-0147
Subject:
acepromazine; anesthesia; case studies; dogs; humans; isoflurane; ketamine; methadone; mountains; patients; seizures
Abstract:
... Seizures or convulsions that occur during anaesthesia in veterinary patients are infrequently reported in the literature. Consequently, the incidence of such events is unknown. Several drugs commonly used in clinical veterinary anaesthesia have been shown to induce epileptiform activity in both human clinical patients and experimental candidates. The present case report describes convulsions in a ...
DOI:
10.1186/1751-0147-52-64
PubMed:
21118580
PubMed Central:
PMC3003231

20. Aborigine‐managed forest, savanna and grassland: biome switching in montane eastern Australia

Author:
Butler, Don W.; Fensham, Roderick J.; Murphy, Brett P.; Haberle, Simon G.; Bury, Sarah J.; Bowman, David M. J. S.; Silman, Miles
Source:
Journal of biogeography 2014 v.41 no.8 pp. 1492-1505
ISSN:
0305-0270
Subject:
Eucalyptus; aerial photography; burning; carbon; ecosystems; fires; grassland soils; grasslands; isotopes; models; mountains; rain forests; savannas; soil profiles; surveys; time series analysis; topography; trees; Australia
Abstract:
... AIM: To assess hypotheses about the role of anthropogenic fire in the maintenance and origin of a fine‐scale vegetation mosaic of rain forest, eucalypt savanna and grassland. LOCATION: Bunya Mountains, subtropical eastern Australia. METHODS: A time series of vegetation maps was compiled from historical and recent aerial photography and field surveys. Geospatial models were constructed of environme ...
DOI:
10.1111/jbi.12306