Environmental drivers of herbaceous plant diversity in the understory community of a warm-temperate forest

Plant Diversity, Journal Year: 2025, Volume and Issue: 47(2), P. 282 - 290

Published: Jan. 23, 2025

Herbaceous plants are an essential component of forest diversity and driver ecosystem processes. However, because the growth forms life-history strategies herbaceous differ from those woody plants, it is unclear whether mechanisms that drive patterns plant community structure in these two groups same. In this study, we determined herb communities have similar drivers alpha- beta-diversity. We compared species richness, distribution, abundance herbs to seedlings a 20-ha Donglingshan warm-temperate (Donglingshan FDP), China. also variation richness composition better explained by environmental or spatial variables. accounted for 72% all (81 herbaceous, 31 woody) recorded. Alpha- beta-diversity were higher than seedlings. Although alpha-diversity was not correlated across site, local-site contributions negatively correlated. Habitat type slightly more seedling composition, with highest low-elevation slope. Environmental variables Our results indicate different communities, exhibiting greater sensitivity habitat dependence. These findings contribute understanding communities.

Language: Английский

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Soil properties constrain forest understory plant distributions along an elevation gradient

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2024, Volume and Issue: 379(1902)

Published: April 7, 2024

Projections of spatial biodiversity dynamics under climate warming are often based on models including only variables, and when non-climatic factors (e.g. soil) included, data at much coarser resolutions than those experienced by plants. Field studies along elevation gradients permit the gathering detailed soil data, while still covering a wide climatic gradient. Here, an intensive field survey four spring forest herbs gradient showed that properties had substantial impacts occurrence/abundance all species, effects were more pronounced higher elevations. For

Language: Английский

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An Efficient Forest Fire Target Detection Model Based on Improved YOLOv5

Fire, Journal Year: 2023, Volume and Issue: 6(8), P. 291 - 291

Published: July 31, 2023

To tackle the problem of missed detections in long-range detection scenarios caused by small size forest fire targets, initiatives have been undertaken to enhance feature extraction and precision models designed for imagery. In this study, two algorithms, DenseM-YOLOv5 SimAM-YOLOv5, were proposed modifying backbone network You Only Look Once version 5 (YOLOv5). From perspective lightweight models, compared YOLOv5, SimAM-YOLOv5 reduced parameter 28.57%. Additionally, although showed a slight decrease recall rate, it achieved improvements average (AP) varying degrees. The algorithm 2.24% increase precision, as well 1.2% rate 1.52% AP YOLOv5 algorithm. Despite having higher size, outperformed terms detection.

Language: Английский

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Seasonal variations in the mechanisms of understory herb diversity in a temperate forest in Northeast China

Ecological Indicators, Journal Year: 2024, Volume and Issue: 160, P. 111827 - 111827

Published: March 1, 2024

Herbaceous plants contribute greatly to plant diversity and play an important role in regulating the structure functioning of forest ecosystems. Comparing with woody species, herbs exhibit higher sensitivity seasonal changes from spring-growth autumn-mortality. Despite extensive research on understory herb (e.g., abundance richness) forests, how underlying mechanisms change across seasons remain unclear, especially temperate forests. We explored dynamics (here by surveying 174 quadrats (1 m × 1 m) a 25-ha (500 500 spring, summer, autumn 2022, respectively. examined effects overstory trees (diversity, composition, three-dimensional (3D) structural complexity detected LiDAR), topography (elevation, slope, aspect), microsite conditions (light availability, soil nutrients, water content) different seasons. found similar pattern for richness, i.e., both decreased spring summer then autumn, but driving differed remarkably Specifically, importance trees, topography, vs. richness varied inversely For abundance, (primarily 3D complexity) increased while decreased. Conversely, increased. Microsite governed spatial variations all only nutrients remaining relatively constant that content light availability changed Our results demonstrate substantial forest. These differentiated responses drivers further highlight significance considering biodiversity conservation.

Language: Английский

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Short-Term Effects of Red Deer Overabundance on Herbaceous Communities in Mediterranean Woody Ecosystems

Published: Jan. 1, 2025

Herbaceous communities are vital for biodiversity in forests and scrublands. Herbivory influences their cover, richness, diversity. Overabundant herbivores disrupt these ecosystem processes. In recent decades, vast territories (e.g., North America, Europe) have experienced a remarkable increase deer (Cervidae) populations. However, few studies examined the effects of increasing ungulate densities different Mediterranean habitats.This study explores short-term impacts red overabundance on diversity (taxonomic functional) herbaceous layers scrublands to guide management. three enclosures across two habitats (scrubland oak forest), we manipulated densities: control (no deer), high density (18-63 deer/km2), hyper (58-113 deer/km2). species occurrence cover were recorded 90 quadrats (50x50 cm), alongside bibliographic data six functional traits. analysed with Generalized Linear Mixed Models.Hyper negatively affected taxonomic both The treatment already showed clear trend towards reducing variables that heavily increased scenario (e.g. 84.2% loss scrubland 64.2% forest). Functional remained unchanged, likely due >40-year legacy herbivory favoring traits typical grazing areas.Deer is causing rapid, drastic changes communities, even short term. Managers should reduce populations protect which offer high-quality forage essential ecological roles.

Language: Английский

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Pawpaws prevent predictability: A locally dominant tree alters understory beta‐diversity and community assembly

Ecosphere, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 1, 2025

Abstract While dominant species are known to be important in ecosystem functioning and community assembly, biodiversity responses the presence of can highly variable. Dominant increase importance deterministic assembly by competitively excluding a consistent way across local communities, resulting low site‐to‐site variation composition (beta‐diversity) nonrandom structure. In contrast, could stochastic reducing total number individuals communities (community size), high beta‐diversity more random We tested these hypotheses large, temperate oak‐hickory forest plot containing locally tree species, pawpaw ( Asimina triloba ; Annonaceae), an understory that occurs dense, clonal patches forests throughout east‐central United States. determined how influences diversity, size, measuring abundance all vascular plant 1 × 1‐m plots both inside outside patches. To test whether processes, we compared observed patterns null model which were assembled at with respect identity. found lower higher than Moreover, standardized effect sizes from patches, indicating Together results suggest increases relative scales, likely decreasing overall numbers increasing extinctions Our findings provide insights into ecological processes shape diversity different spatial scales.

Language: Английский

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Reproductive phenology and pollination biology of the wild pineapple Ananas bracteatus (Bromeliaceae): an analysis based on field and herbarium records

Botany Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 14

Published: Jan. 22, 2025

Language: Английский

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Analysis of Understory Plant Community Assembly Differences in Moso Bamboo Forests in the Subtropical Evergreen Broad-Leaved Forest Region of Eastern China

Forests, Journal Year: 2025, Volume and Issue: 16(3), P. 478 - 478

Published: March 8, 2025

Moso bamboo (Phyllostachys edulis (Carrière) J. Houz.) forests are a vital forest type in subtropical China. This study investigates the diversity, floristic composition, and phylogenetic structure of understory vegetation these within evergreen broad-leaved eastern Using grid-based sampling, we calculated species diversity indices, employed correlation analysis, redundancy structural equation modeling to assess effects canopy closure, soil properties, topography. The exhibited high richness, with shrub layer demonstrating phytogeographic characteristics predominantly associated tropical distribution types, while herbaceous is characterized by temperate types. Canopy closure environmental factors significantly influenced showing clustered (NTI > 0, NRI 0) negative diversity. In contrast, herb displayed divergent < 0), shaped neutral stochastic processes, reflecting endemic taxa interspecific interactions. These findings emphasize need for targeted management practices conserve biodiversity, focusing on enhancing protecting their ecological

Language: Английский

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Forest Plant Diversity Assessment Based on Remote Sensing: A Systematic Literature Review

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

This document presents a systematic literature review on the assessment of forest plant diversity using remote sensing techniques. Forest plays crucial role in maintaining ecosystem stability and providing essential services. However, human activities pose significant threats to biodiversity, necessitating effective monitoring conservation efforts. biodiversity provides evidence-based data for programs decision-making. Traditional methods have limitations terms cost, time, spatial coverage. Remote data, other hand, offers flexible cost-effective approach monitor species diversity, explore diversity-productivity relationships, identify hotspots. paper highlights various approaches assess with focus The benefits drawbacks are discussed, along use Earth Observation satellite images, LiDAR unmanned aerial vehicles (UAVs) mapping vegetation biodiversity. case studies showcasing parameters across different ecosystems sensing. It analyzes temporal trend publications, publishers, authors this field, analysis study regions. Furthermore, discusses challenges identifies research areas improving its accuracy. Overall, comprehensive overview based emphasizes importance efforts, advancements technology, future directions enhance accuracy effectiveness monitoring.

Language: Английский

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Evolution of Indian monsoon precipitation and vegetation dynamics in the Bay of Bengal region since the last glacial period

Quaternary Science Reviews, Journal Year: 2025, Volume and Issue: 356, P. 109314 - 109314

Published: March 27, 2025

Language: Английский

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