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1. A comparative assessment of the vertical distribution of forest components using full-waveform airborne, discrete airborne and discrete terrestrial laser scanning data

Author:
Crespo-Peremarch, Pablo; Fournier, Richard A.; Nguyen, Van-Tho; van Lier, Olivier R.; Ruiz, Luis Ángel
Source:
Forest ecology and management 2020 v.473 pp. 118268
ISSN:
0378-1127
Subject:
understory,   etc   ; canopy; conifers; forests; lidar; spatial distribution;     Show all 6 Subjects
Abstract:
... Laser scanning has the potential to accurately detect the vertical distribution of forest vegetative components. However, limitations are present and vary according to the system’s platform (i.e., terrestrial or airborne) and recording method (i.e., discrete return or full-waveform). Terrestrial configurations detect close objects (i.e., lower vegetation strata) in more detail while airborne confi ...
DOI:
10.1016/j.foreco.2020.118268

2. Differential effects of drought on nonstructural carbohydrate storage in seedlings and mature trees of four species in a subtropical forest

Author:
Zhang, Peipei; Zhou, Xuhui; Fu, Yuling; Shao, Junjiong; Zhou, Lingyan; Li, Songsong; Zhou, Guiyao; Hu, Zhenhong; Hu, Jiaqi; Bai, Shahla Hosseini; McDowell, Nate G.
Source:
Forest ecology and management 2020 v.469 pp. 118159
ISSN:
0378-1127
Subject:
understory,   etc   ; Lithocarpus; climate change; drought; hydraulic resistance; models; photosynthesis; prediction; seedlings; sugars; throughfall; trees; tropical forests;     Show all 13 Subjects
Abstract:
... Nonstructural carbohydrates (NSC) play important roles in forest vulnerability to climate change, especially under increasing drought intensity and frequency. Understanding NSC dynamics is essential for accurately predicting the resistance and resilience of forests in response to drought. However, our knowledge of NSC responses to drought is still limited due to the lack of research in trees of di ...
DOI:
10.1016/j.foreco.2020.118159

3. Below‐ground determinants and ecological implications of shrub species' degree of isohydry in subtropical pine plantations

Author:
Jiang, Peipei; Meinzer, Frederick C.; Wang, Huimin; Kou, Liang; Dai, Xiaoqin; Fu, Xiaoli
Source:
Thenew phytologist 2020 v.226 no.6 pp. 1656-1666
ISSN:
0028-646X
Subject:
understory,   etc   ; drought; foraging; hydraulic conductivity; nutrient use efficiency; photosynthesis; plantations; roots; shrubs; wood density;     Show all 10 Subjects
Abstract:
... The degree of plant iso/anisohydry is a popular framework for characterising species‐specific drought responses. However, we know little about associations between below‐ground and above‐ground hydraulic traits as well as the broader ecological implications of this framework. For 24 understory shrub species in seasonally dry subtropical coniferous plantations, we investigated contributions of the ...
DOI:
10.1111/nph.16502

4. Seasonal Correlations between Kudzu and Avian Species Diversity and Abundance in Southeastern Tennessee

Author:
Hudson, Amelia B.; Aborn, David A.
Source:
Southeastern naturalist 2020 v.19 no.1 pp. 161-178
ISSN:
1528-7092
Subject:
understory,   etc   ; Pueraria montana var. lobata; birds; indigenous species; invasive species; overstory; species richness; vegetation; Tennessee;     Show all 9 Subjects
Abstract:
... Because of its widespread distribution, Pueraria montana var. lobata (Kudzu) is one of the most common invasive species management concerns in the Southeast. Nonetheless, there are few quantitative data documenting its effects on native species. This study examines the seasonal correlations between Kudzu and avian species diversity and abundance in southeastern Tennessee. By measuring the structur ...
DOI:
10.1656/058.019.0117

5. Multi-layered tree crown extraction from LiDAR data using graph-based segmentation

Author:
Dong, Tianyang; Zhang, Xinpeng; Ding, Zhanfeng; Fan, Jing
Source:
Computers and electronics in agriculture 2020 v.170 pp. 105213
ISSN:
0168-1699
Subject:
understory,   etc   ; algorithms; canopy; canopy height; forests; lidar; models; overstory; tree crown; trees; unmanned aerial vehicles;     Show all 11 Subjects
Abstract:
... With the development of Light Detection and Ranging (LiDAR) and Unmanned Aerial Vehicle (UAV) technology, extracting tree crowns from LiDAR data and infering their geometrical features are becoming more available for everyone. Although the forest has a significant stratification phenomenon in the vertical direction, the existing individual tree detection methods generally aimed at solving overstor ...
DOI:
10.1016/j.compag.2020.105213

6. Effects of 16-Year Deer Exclusion on the Forbs and Tree Saplings in a Beech (Fagus crenata) Forest Degraded by Sika Deer in Eastern Japan

Author:
Tamura, Atsushi
Source:
Natural areas journal 2020 v.40 no.1 pp. 4-10
ISSN:
0885-8608
Subject:
understory,   etc   ; Cervus nippon; Fagus crenata; clones; deer; forbs; forests; ground vegetation; interspecific competition; mountains; saplings; Japan;     Show all 12 Subjects
Abstract:
... Long-term exclusion of deer may decrease some plant species through interspecific competition. I studied the effects of deer exclosures for 16 y on tall forbs and tree saplings inside and outside three exclosures of beech forest in the Tanzawa Mountains, eastern Japan. Understory cover ranged from 69% to 95%, and herb-layer height ranged from 1.1 to 1.4 m, inside and outside the exclosures. The de ...
DOI:
10.3375/043.040.0102

7. Why does Daphne pseudomezereum drop its leaves in the summer? An adaptive alternative to surviving forest shade

Author:
Lei, Thomas; Yamashita, Naoko; Watanabe, Takuya; Kawahara, Takayuki; Miyaura, Tomiyasu
Source:
Physiologia plantarum 2020 v.168 no.1 pp. 77-87
ISSN:
0031-9317
Subject:
understory,   etc   ; Daphne; ancestry; autumn; carbon; dormancy; ecophysiology; leaves; microclimate; phenology; summer; temperate forests; winter; woody plants;     Show all 14 Subjects
Abstract:
... Daphne pseudomezereum A. Gray (Dpm) appears to be the only woody species in the north temperate forest that sheds its leaves in the summer while remaining green over winter (i.e. wintergreen leaf habit). Yet, the reason for this odd leaf habit has not been explored. To this end, we examined the microclimatic settings and ecophysiological traits of Dpm and its three native congeners in a field stud ...
DOI:
10.1111/ppl.12972
PubMed:
30950068
PubMed Central:
PMC7003882

8. An overview of in situ digital canopy photography in forestry

Author:
Chianucci, Francesco
Source:
Canadian journal of forest research 2020 v.50 no.3 pp. 227-242
ISSN:
1208-6037
Subject:
understory,   etc   ; canopy; case studies; leaf angle; overstory; phenology; photography; tree and stand measurements;     Show all 8 Subjects
Abstract:
... Since the 1960s, canopy photography has been widely used in forestry. Hemispherical photography has been the most widely used technique, but a great drawback of this method is its perceived sensitivity to hemispherical image acquisition and processing. Over the last decade, several alternative photographic approaches using restricted view angle have been proposed. Cover photography acquired via a ...
DOI:
10.1139/cjfr-2019-0055

9. Induction of desiccation tolerance mechanisms occurs in both the fast-drying filmy fern Crepidomanes inopinatum and the slow-drying fern Loxogramme abyssinica

Author:
Mkhize, K.G.W.; Minibayeva, F.; Beckett, R.P.
Source:
South African journal of botany 2020 v.131 pp. 131-137
ISSN:
0254-6299
Subject:
understory,   etc   ; Loxogramme; chlorophyll; drought tolerance; ferns and fern allies; forests; peroxidases; reactive oxygen species; rehydration; sugars; superoxide dismutase; South Africa;     Show all 12 Subjects
Abstract:
... The desiccation tolerant (DT) fern species Crepidomanes inopinatum and Loxogramme abyssinica often grow together in the understory of KwaZulu-Natal Afromontane forests. Crepidomanes inopinatum is a “filmy” fern that dries rapidly because it lacks a cuticle; by contrast L. abyssinica possesses a cuticle, and therefore dries slowly. It was predicted that because C. inopinatum dries quickly, this spe ...
DOI:
10.1016/j.sajb.2020.02.014

10. Canopy structure and understory light characteristics of a natural Quercus aliena var. acuteserrata forest in China northwest: Influence of different forest management methods

Author:
Wan, Pan; He, Ruirui
Source:
Ecological engineering 2020 v.153 pp. 105901
ISSN:
0925-8574
Subject:
understory,   etc   ; Quercus; canopy; forest management; leaf angle; leaf area index; radiant energy; secondary forests; silviculture; trees; China;     Show all 11 Subjects
Abstract:
... Close-to-nature forest management (CNFM), structure-based forest management (SBFM), and secondary forest comprehensive silviculture (SFCS) are three forest management methods that have been promoted in China. Unfortunately, changes to the canopy structure and understory light characteristics after forest management remain unclear. We compared the canopy structure and light characteristics of a nat ...
DOI:
10.1016/j.ecoleng.2020.105901

11. Vegetation dynamics and regeneration of Pinus pinea forests in Mount Lebanon: Towards the progressive disappearance of pine

Author:
Nakhoul, Joseph; Fernandez, Catherine; Bousquet-Mélou, Anne; Nemer, Nabil; Abboud, Jihad; Prévosto, Bernard
Source:
Ecological engineering 2020 v.152 pp. 105866
ISSN:
0925-8574
Subject:
understory,   etc   ; Pinus pinea; Quercus coccifera; Quercus infectoria; altitude; bedrock; botanical composition; coniferous forests; rain; seedlings; soil; temperature; topographic slope; Lebanon;     Show all 14 Subjects
Abstract:
... Pinus pinea is a species of great economic and ecological importance in Lebanon, but there is a lack of knowledge about the distribution of the pine forests, their vegetation dynamics and regeneration. Our study aims to produce the first classification of the pine stands according to their floristic composition and the abiotic factors of the Mount Lebanon region and to analyse natural pine recruit ...
DOI:
10.1016/j.ecoleng.2020.105866

12. Distortion of the local magnetic field appears to neither disrupt nocturnal navigation nor cue shelter recognition in the amblypygid Paraphrynus laevifrons

Author:
Wiegmann, Daniel D.; Casto, Patrick; Hebets, Eileen A.; Bingman, Verner P.
Source:
Ethology 2020 v.126 no.4 pp. 403-412
ISSN:
0179-1613
Subject:
understory,   etc   ; Drosophila; Formicidae; Neotropics; Phrynidae; animal behavior; arthropods; field experimentation; geophysics; magnetic fields; magnetic materials; radio transmitters; rain forests;     Show all 13 Subjects
Abstract:
... Many arthropods are known to be sensitive to the geomagnetic field and exploit the field to solve spatial problems. The polarity of the geomagnetic field is used, for instance, as an orientation cue by leafcutter ants as they travel on engineered trails in a rainforest and by Drosophila larvae as they move short distances in search of food. A ubiquitous orientation cue like the geomagnetic field m ...
DOI:
10.1111/eth.12985

13. Paleoecological potential of phytoliths from lake sediment records from the tropical lowlands of Bolivia

Author:
Whitney, Bronwen; Plumpton, Heather; Plumpton, Heather J.; Mayle, Francis M.; Whitney, Bronwen S.
Source:
Review of palaeobotany and palynology 2020 v.275 pp. 104113
ISSN:
0034-6667
Subject:
understory,   etc   ; Neotropics; climate change; humans; lakes; lowlands; paleoecology; phytoliths; pollen; savannas; sediments; soil; theoretical models; watersheds; Bolivia;     Show all 15 Subjects
Abstract:
... Phytolith analysis is conventionally an archeo-botanical tool used to study past human activity using material from excavations or soil pits. However, phytolith analysis also has potential as a paleoecological tool, to reconstruct vegetation changes through periods of climatic change and human influence. To study phytoliths from lake sediment alongside pollen requires an understanding of phytolith ...
DOI:
10.1016/j.revpalbo.2019.104113

14. Increased light availability due to forestry mowing of invasive European buckthorn promotes its regeneration

Author:
Anfang, Carl; Schuster, Michael J.; Wragg, Peter D.; Reich, Peter B.
Source:
Restoration ecology 2020 v.28 no.2 pp. 475-482
ISSN:
1061-2971
Subject:
understory,   etc   ; Rhamnus cathartica; biodiversity; forest litter; forestry; germination; growing season; invasive species; mowing; mulches; seedlings; shade; temperate forests; winter; Minnesota;     Show all 15 Subjects
Abstract:
... The invasive shrub Rhamnus cathartica L. (common buckthorn) dominates the understory of many temperate forests of eastern North America. Common buckthorn outcompetes native understory species for light, forming monospecific stands that suppress plant and animal diversity. Removing common buckthorn is a common management priority within its invasive range. In recent years, forestry mowing has becom ...
DOI:
10.1111/rec.13107

15. A whole noeggerathialean plant Tingia unita Wang from the earliest Permian peat-forming flora, Wuda Coalfield, Inner Mongolia

Author:
Wang, Jun; Wan, Shan; Kerp, Hans; Bek, Jiří; Wang, Shijun
Source:
Review of palaeobotany and palynology 2020 pp. 104204
ISSN:
0034-6667
Subject:
understory,   etc   ; Permian period; biomass; compound leaves; flora; forests; paleobotany; peat; spores; swamp plants; swamps; tree ferns; trees; China;     Show all 14 Subjects
Abstract:
... The genus Tingia Halle is one of the most typical taxa of the Cathaysia Flora. However, its affinity, has long been uncertain. Tingia unita Wang 2006 was named based on the discovery of a crown of a tree that shows the organic connection of the simple compound leaves and the strobili with the stem. It is among the very few species of the Noeggerathiales of which both fertile and sterile parts are ...
DOI:
10.1016/j.revpalbo.2020.104204

16. Confinement influenced the diurnal behavior of Katahdin rams and Kiko wethers in southern-pine silvopastures

Author:
Poudel, Sanjok; Karki, Uma; Karki, Yubaraj; Tillman, Asha
Source:
Agroforestry systems 2020 v.94 no.1 pp. 29-40
ISSN:
0167-4366
Subject:
understory,   etc   ; Pinus taeda; body weight; browsing; cold season; debarking; diurnal activity; grazing; rams; silvopastoral systems; spring; trees; vegetation; wethers; winter;     Show all 15 Subjects
Abstract:
... Previous studies with Kiko wethers rotationally stocked in southern-pine silvopastures showed a significant debarking of 10-11-year-old pine trees during winter and spring. There is a need to identify suitable animals and management strategies to protect trees in silvopastures. The objective of the study was to determine the effect of confinement on diurnal behavior and distribution pattern of Kat ...
DOI:
10.1007/s10457-019-00359-7

17. Population structures and spatial patterns of two unpalatable Arisaema species (Araceae) with and without clonal reproduction in a riparian forest intensively grazed by Sika deer

Author:
Matsumoto, Tetsuya K.; Hirobe, Muneto; Akaji, Yasuaki; Miyazaki, Yuko
Source:
Journal of forestry research 2020 v.31 no.1 pp. 155-162
ISSN:
1007-662X
Subject:
understory,   etc   ; Arisaema; Cervus nippon; asexual reproduction; deer; foraging; grazing intensity; herbivores; population size; riparian forests; seed dispersal;     Show all 11 Subjects
Abstract:
... General decline of understory cover can result from increased abundance of and foraging pressure by deer. But population size and degree of aggregation can increase for unpalatable understory plants that escape foraging pressure. Clonal reproduction can enable unpalatable plant species to increase their population sizes while trending toward spatially aggregated distributions. However, the details ...
DOI:
10.1007/s11676-018-0845-9

18. Carabid activity‐density increases with forest vegetation diversity at different spatial scales

Author:
Jouveau, Séverin; Toïgo, Maude; Giffard, Brice; Castagneyrol, Bastien; van Halder, Inge; Vétillard, Fabrice; Jactel, Hervé
Source:
Insect conservation and diversity 2020 v.13 no.1 pp. 36-46
ISSN:
1752-458X
Subject:
understory,   etc   ; Carabidae; canopy; forest ecosystems; forests; habitats; insect resistance; phytophagous insects; predation; predatory insects; species richness; trees;     Show all 12 Subjects
Abstract:
... More diverse forests are generally more resistant to insect herbivores. This might be due to positive effects of tree diversity on predation. Although the enemies hypothesis has received conflicting evidence in forest ecosystems. Carabids were sampled by pitfall trapping in a tree diversity experiment, at the centre of plots ranging from one to five tree species mixtures. The composition and verti ...
DOI:
10.1111/icad.12372

19. Invasion of the Parthenocissus inserta (Kern.) K. Fritsch. in Floodplain Forests of Rostov Oblast

Author:
Kozlovskiy, B. L.; Fedorinova, O. I.; Kuropyatnikov, M. V.
Source:
Russian journal of biological invasions 2020 v.11 no.1 pp. 41-46
ISSN:
2075-1117
Subject:
understory,   etc   ; Parthenocissus vitacea; Quercus; bark; ecological invasion; floodplains; flora; forests; ground vegetation; herbaceous plants; lianas; rivers; tree trunk; trees; Russia;     Show all 15 Subjects
Abstract:
... Naturalization of woody lianas poses a great danger to the ravine and floodplain forests of Rostov oblast. Therefore, the aim of the work was to study morphology, ecological and biological properties, and the invasive process of Partenocissus inserta. Studies were carried out in the Botanical Garden of the Southern Federal University and in the west of Rostov oblast in a floodplain oak forest at t ...
DOI:
10.1134/S2075111720010075

20. Linking reliance on deep soil water to resource economy strategies and abundance among coexisting understorey shrub species in subtropical pine plantations

Author:
Jiang, Peipei; Wang, Huimin; Meinzer, Frederick C.; Kou, Liang; Dai, Xiaoqin; Fu, Xiaoli
Source:
Thenew phytologist 2020 v.225 no.1 pp. 222-233
ISSN:
0028-646X
Subject:
understory,   etc   ; drought; dry season; fine roots; leaf water potential; plantations; shrubs; soil water; species abundance; water use efficiency; wood density;     Show all 11 Subjects
Abstract:
... Strategies for deep soil water acquisition (WAdₑₑₚ) are critical to a species’ adaptation to drought. However, it is unknown how WAdₑₑₚ determines the abundance and resource economy strategies of understorey shrub species. With data from 13 understorey shrub species in subtropical coniferous plantations, we investigated associations between the magnitude of WAdₑₑₚ, the seasonal plasticity of WAdₑₑ ...
DOI:
10.1111/nph.16027