Ecological drivers shaping mainstem and tributary fish communities in the upper Jinsha River, southeastern Qinghai-Tibet Plateau

Ecological Processes, Journal Year: 2025, Volume and Issue: 14(1)

Published: Jan. 2, 2025

Abstract Background Elucidating spatial variation in ecological communities and the mechanisms of community assembly is crucial for biodiversity conservation river ecosystems. The upper Jinsha River located eastern part Qinghai-Tibet Plateau, experiencing intensified human activities, such as hydropower development. In this study, fish surveys were conducted at 38 sites, including 15 mainstem sites 23 tributary River, China, to analyze patterns drivers communities. Results NMDS PERMANOVA analysis revealed significant disparities between tributaries. Schizothorax dolichonema Schizopygopsis malacanthus dominated mainstem, whereas , wangchiachii Triplophysa stenura Fish beta diversity exhibited substantial turnover across tributaries, entire basin. Both environmental factors (e.g., altitude proportion cobble substrate) variables significantly correlated with diversity, but their relative importance differed Specifically, emerged primary drivers. contrast, assumed a predominant role Conclusions results suggested that filtering predominantly drove dispersal limitation exerted had greater influence on These contribute our understanding formation assemblages tributaries high-altitude rivers, River. context development findings offer insights into management diversity.

Language: Английский

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Patterns and assembly processes of planktonic and sedimentary bacterial community differ along a trophic gradient in freshwater lakes

Ecological Indicators, Journal Year: 2019, Volume and Issue: 106, P. 105491 - 105491

Published: June 21, 2019

Language: Английский

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Temporal β diversity—A macroecological perspective

Global Ecology and Biogeography, Journal Year: 2019, Volume and Issue: 28(12), P. 1949 - 1960

Published: Nov. 10, 2019

Abstract Issue Biodiversity change, that is how the taxonomic identities and abundances of species in ecological systems are changing over time, has two facets: temporal α diversity β diversity. To date, received most attention even though compositional shifts assemblages exceed expectations based on theory. Growing concern about state world’s biodiversity highlights need for better understanding extent, consequences, reorganization systems. Challenges Most methods measuring have been developed a spatial context. We discuss additional challenges involved assessment summarize existing methodological approaches, highlight importance establishing relevant baselines, identify appropriate null models Given considerable potential research macroecology we suggest future directions challenges. Conclusions Although data availability remains main impediment to improved quantification at macroecological scales, there substantial opportunities methodology Taxonomic attention, but other dimensions diversity, including functional phylogenetic, should be part integrated assessments change. Future approaches ecologically meaningful interpretable as well statistically robust.

Language: Английский

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Species richness and beta diversity patterns of multiple taxa along an elevational gradient in pastured grasslands in the European Alps

Scientific Reports, Journal Year: 2020, Volume and Issue: 10(1)

Published: July 27, 2020

Abstract To understand how diversity is distributed in space a fundamental aim for optimizing future species and community conservation. We examined parallel richness beta components of nine taxonomic groups along finite space, represented by pastured grasslands an elevational gradient. Beta diversity, which assumed to bridge local alpha regional gamma was partitioned into the two turnover nestedness analyzed at levels: from lowest elevation all other elevations, between neighboring elevations. Species vascular plants, butterflies, beetles, spiders earthworms showed hump-shaped relationship with increasing elevation, while it decreased linearly grasshoppers ants, but increased lichens bryophytes. For most groups, distance gradient decreased. With regard step-wise rates or did not change notably steps majority groups. Our results support assumption that communities occupying same habitat significantly however transition seems happen continuously detectable steps. findings, rather than delineating levels major losses, indicate conservation actions targeting preventive protection their environment mountainous regions require consideration entire spatial settings.

Language: Английский

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Divergent biodiversity change within ecosystems

Proceedings of the National Academy of Sciences, Journal Year: 2018, Volume and Issue: 115(8), P. 1843 - 1847

Published: Feb. 12, 2018

The Earth’s ecosystems are under unprecedented pressure, yet the nature of contemporary biodiversity change is not well understood. Growing evidence that community size regulated highlights need for improved understanding dynamics. As stability in could be underpinned by marked temporal turnover, a key question extent to which changes both dimensions (temporal α- and β-diversity) covary within among assemblages comprise natural communities. Here, we draw on multiassemblage dataset (encompassing vertebrates, invertebrates, unicellular plants) from tropical freshwater ecosystem employ cyclic shift randomization assess whether any directional α-diversity β-diversity exceeds baseline levels. In majority cases, remains stable over 5-y time frame our analysis, with little systematic at level. contrast, more prevalent, two diversity decoupled within- among-assemblage Consequently, pressing research challenge establish how turnover supports regulation when elevated jeopardizes integrity.

Language: Английский

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Prokaryotic Diversity in Mangrove Sediments across Southeastern China Fundamentally Differs from That in Other Biomes

mSystems, Journal Year: 2019, Volume and Issue: 4(5)

Published: Sept. 9, 2019

Understanding the underlying mechanisms of microbial community assembly patterns is a vital issue in ecology. Mangroves, as an important and special ecosystem, provide unique environment for examining relative importance stochastic deterministic processes. We made first global-scale comparison found that diversity was significantly different mangrove sediments compared to other biomes. Furthermore, our results suggest process more shaping mangroves.

Language: Английский

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Temperature shapes opposing latitudinal gradients of plant taxonomic and phylogenetic β diversity

Ecology Letters, Journal Year: 2019, Volume and Issue: 22(7), P. 1126 - 1135

Published: May 7, 2019

Latitudinal and elevational richness gradients have received much attention from ecologists but there is little consensus on underlying causes. One possible proximate cause increased levels of species turnover, or β diversity, in the tropics compared to temperate regions. Here, we leverage a large botanical dataset map taxonomic phylogenetic as mean turnover between neighboring 100 × km cells, across Americas determine key climatic drivers. We find tip-weighted diversity higher tropics, that basal-weighted highest Supporting Janzen's 'mountain passes' hypothesis, tropical mountainous regions had than for metrics. The strongest predictors were average temperature seasonality. Taken together, these results suggest coupled latitudinal major driver plant community composition change.

Language: Английский

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Plant diversity in hedgerows and road verges across Europe

Journal of Applied Ecology, Journal Year: 2020, Volume and Issue: 57(7), P. 1244 - 1257

Published: March 19, 2020

Abstract Linear landscape elements such as hedgerows and road verges have the potential to mitigate adverse effects of habitat fragmentation climate change on species, for instance, by serving a refuge or improving functional connectivity across landscape. However, so far this hypothesis has not been evaluated at large spatial scales, preventing us from making generalized conclusions about their efficacy implementation in conservation policies. Here, we assessed plant diversity patterns 336 vegetation plots distributed along verges, spanning macro‐environmental gradient temperate Europe. We compared herb‐layer species richness composition these linear with respective seed‐source (core) habitats, that is, semi‐natural forests grasslands. Next, how differences related several environmental drivers acting either locally, level studied macro‐ecological gradient. Across all regions, 55% were shared between hedgerows, 52% grasslands verges. Habitat‐specialist was 11% lower habitats than core while generalist 14% higher. The difference floristic both types mainly due turnover, nestedness. Most notably, forest‐specialist responded positively tree cover, height proportion surrounding landscape, negatively affected buffering effect trees subcanopy temperatures. Grassland verge influenced soil properties, positive basic cation levels number specialists those bioavailable phosphorus diversity. Synthesis applications . demonstrate provide Europe, including slow‐colonizing specialists. Additionally, our results stress possibility land managers modify local features (e.g. canopy structure, microclimate, mowing regime) through management practices enhance colonization success habitats. These findings underpin needed better conserving biodiversity agricultural landscapes broad geographical scales.

Language: Английский

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Vertical diversity and association pattern of total, abundant and rare microbial communities in deep‐sea sediments

Molecular Ecology, Journal Year: 2021, Volume and Issue: 30(12), P. 2800 - 2816

Published: May 8, 2021

Microbial abundance and community composition in marine sediments have been widely explored. However, high-resolution vertical changes of benthic microbial diversity co-occurrence patterns are poorly described. The ecological contributions abundant rare species also remain largely unknown. Here, by analysing populations at 14 depth layers 10 subseafloor sediment cores (water 1,250-3,530 m) obtained the South China Sea, we provided profiles β-diversity influenced subcommunities different abundance. These 134 samples were clustered into four groups according to (1-2, 6-10, 30-90 190-790 cm) with obvious shifts compositions. succession microorganisms was consistent redox zonation terrestrial inputs. Partitioning showed extremely high replacement between deep surface layer, indicating selection-induced loss dispersal dormant cells spores. By contrast, for horizontal β-diversity, richness became increasingly significant sediments. Accompanying this profile clear association pattern, being less connected deeper layers, probably reflecting reduced syntrophic interactions. Rare accounted an indispensable proportion network, tended form complex "small worlds." subcommunity responded differently various environmental factors compared subcommunity. Our findings expand current knowledge on their patterns, emphasizing potential roles species.

Language: Английский

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Soil microbial distribution and assembly are related to vegetation biomass in the alpine permafrost regions of the Qinghai-Tibet Plateau

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 834, P. 155259 - 155259

Published: April 19, 2022

Language: Английский

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