Effects of river network position on benthic macroinvertebrate diversity and community assembly in the Chishui River

Journal of Lake Sciences, Journal Year: 2025, Volume and Issue: 37(2), P. 578 - 589

Published: Jan. 1, 2025

Language: Английский

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Coupling Environmental Factors and Climate Change: Impacts on Plants and Vegetation Growth Patterns in Ecologically Sensitive Regions

Published: Jan. 1, 2024

Language: Английский

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Defining, estimating, and understanding the fundamental niches of complex animals in heterogeneous environments

Ecological Monographs, Journal Year: 2022, Volume and Issue: 92(4)

Published: July 8, 2022

Abstract During the past century, fundamental niche, complete set of environments that allow an individual, population, or species to persist, has shaped ecological thinking. It is a crucial concept connecting population dynamics, spatial ecology, and evolutionary theory, prerequisite for predictive models at time rapid environmental change. Yet, its properties have eluded quantification, particularly mobile, cognitively complex organisms. These difficulties are mainly result separation between niche theory field data, dichotomy geographical spaces. Here, I combine recent mathematical statistical results linking habitats growth, achieve quantitative intuitive understanding niches animals. trace development ideas from early steps ecology their use in modern conservation practice. examine how animal mobility behavior may blur division space. discuss central lead concise equation animals demonstrate fitness parameters can be understood directly estimated by fitting this model simultaneously data on growth distributions. first illustrate these concepts theoretically territorial species. then fit house sparrow colonies quantify selective increase heterogeneous environments. This work confirms had been anticipated historical literature. Specifically, within traditionally defined spaces, habitat heterogeneity behavioral plasticity make more malleable than was historically envisaged. However, once examined higher‐dimensional accounting heterogeneity, predictable recently suspected. re‐evaluation quantifies organisms might buffer themselves change bending boundaries viable space offers framework designing optimal interventions protect biodiversity obstruct invasive therefore promotes as key responses changing tool management.

Language: Английский

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Distinct mechanisms shape prokaryotic community assembly across different land-use intensification

Water Research, Journal Year: 2023, Volume and Issue: 245, P. 120601 - 120601

Published: Sept. 9, 2023

Language: Английский

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Partitioning the temporal changes in abundance‐based beta diversity into loss and gain components

Methods in Ecology and Evolution, Journal Year: 2022, Volume and Issue: 13(9), P. 2042 - 2048

Published: June 18, 2022

Abstract Ecologists have long recognized that the losses and gains in local species abundances can either decrease or increase spatial beta diversity, phenomena often referred to as biotic homogenization differentiation, respectively. However, quantifying such dynamic impacts of on diversity has remained a methodological challenge. Here, we develop numerical method additively partition temporal changes into distinct components reflect abundances. Our is based Ružička Bray–Curtis indices normalized abundance‐based Whittaker's diversity. The these measures are partitioned represent differentiation driven by abundance at both community levels. Application Swedish fish dataset revealed decreases between 1990 2018. communities was explained gains, but not losses, across sites. Species‐level partitioning further showed largely caused increased population sizes particular sites where it already present. results highlight our effectively identifies processes embedded regional biodiversity patterns. We believe explicit analyses should bring deeper insights dynamics

Language: Английский

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Long‐term subtropical grassland plots take a long time to change: Replacement is more important than richness differences for beta diversity

Ecology and Evolution, Journal Year: 2023, Volume and Issue: 13(6)

Published: June 1, 2023

We studied β diversity of grasses in a subtropical grassland over 60 years South Africa. examined the effects burning and mowing on 132 large plots. sought to determine mowing, frequency, replacement species richness. conducted study at Ukulinga, research farm University KwaZulu-Natal, Pietermaritzburg, Africa (29°24'E, 30°24'S) from 1950-2010. Plots were burned annually, biennially, triennially, control (unburned). mowed spring, late summer, spring plus (unmowed). calculated diversity, with focus richness differences. also used distance-based redundancy analyses examine relative differences burning. beta regressions test for effect soil depth its interactions There was no significant change grass until 1995. Thereafter, there changes that demonstrated primary summer frequency. but strong post-1995. interaction between frequency one analyses. Changes composition took long time manifest themselves unapparent prior 1988. However, sampling strategy 1988, point hits nearest plants, may have influenced rates Using β-diversity indices, we found more important than unimportant,

Language: Английский

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Environmental heterogeneity determines beta diversity and species turnover for woody plants along an elevation gradient in subtropical forests of China

Forestry Research, Journal Year: 2023, Volume and Issue: 3(1), P. 0 - 0

Published: Jan. 1, 2023

To understand how diversity change with environmental gradients is a fundamental aim for clarifying biodiversity pattern and underlying mechanisms. Here, we studied the characteristics of beta its partitioning components woody plant communities along an elevation gradient in subtropical forests China, thus explored effects environment space on diversity. By using Classification Method, divided species Daiyun Mountain into four groups, namely generalists, high-elevation specialists, low-elevation specialists rare species. We then calculated diversity, partitioned it turnover nestedness. Method dbRDA was conducted to analyze impact spatial distance components. Beta comprised two components: Species larger contributor total tend increase as changes. This can be attributed heterogeneity, resulting differentiation specialized Environmental factors, specifically air temperature slope, played significant role explaining variation However, variables did not have influence these patterns. The maintenance mainly governed by filtering. Future conservation efforts should focus strengthening protection high areas.

Language: Английский

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A mismatch between community assembly and abundance‐based diversity indices

Ecography, Journal Year: 2024, Volume and Issue: 2024(4)

Published: Jan. 3, 2024

Long‐term ecological studies have consistently reported slower than expected changes in biodiversity over time. One explanation for this phenomenon is that commonly used diversity measurements such as species richness are too coarse to detect mechanisms shaping community assembly. Theory suggests similar phenomena may occur abundance‐based measurements, but the extent of problem currently unclear. We confront theoretical prediction with field data by studying temporal indices across 3341 observations from 880 plots 15 long‐term vegetation plot studies. then partition change into interest ecologists: selection, drift, and immigration. show these resulting relative abundances often produce non‐linear diversity. These non‐linearities lead counterintuitive effects easy miss when directly analysing To resolve we explicit partitioning leads one further, less‐studied partition: ‘rarity shifts'. Rarity shifts measure how an individual's contributions rarity responsible counter‐intuitive effects, example radical composition negligible found important component many Furthermore, tend oppose drift Therefore, explain why abundance do not result measurements. Ultimately, using can a more accurate understanding rate nature ecology conservation.

Language: Английский

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Are plant traits drivers of endophytic communities in seasonally flooded tropical forests?

American Journal of Botany, Journal Year: 2024, Volume and Issue: unknown

Published: July 16, 2024

Abstract Premise In the Amazon basin, seasonally flooded (SF) forests offer varying water constraints, providing an excellent way to investigate role of habitat selection on microbial communities within plants. However, variations in community among host plants cannot solely be attributed environmental factors, and how plant traits contribute assemblages remains open question. Methods We described leaf‐ root‐associated using ITS2 16 S high‐throughput sequencing investigated stochastic‐deterministic balance shaping these assemblies two null models. Plant ecophysiological functioning was evaluated by focusing 10 leaf root 72 seedlings, belonging seven tropical SF tree species French Guiana. then analyzed drove assembly endophytic communities. Results While both stochastic deterministic processes governed endophyte leaves roots, stochasticity prevailed. Discrepancies were found between fungi bacteria, highlighting that microorganisms have distinct ecological strategies Traits, especially traits, spatial predictors better explained diversity than composition, but they modest overall. Conclusions This study widens our knowledge about forests, a sensitive climate change, through combined analyses their associated with functional traits. emphasize need other disentangle drivers relationship seedlings microbiomes, ultimately enhancing adaptive capacities change.

Language: Английский

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Continent‐wide analysis of moss diversity in Antarctica

Ecography, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Mosses play a key role in Antarctic ecosystems. Understanding of moss diversity and its likely drivers across Antarctica is, however, limited, as is the extent to which Specially Protected Areas (ASPAs) represent this diversity. Both are important given changing climates direct human impacts region. Here we investigate variation diversity, frequency distribution their range sizes, continent‐wide conservation. Richness positively related temperature, but negatively latitude, distance from bird colonies geothermal sites; terrain roughness showed weak, yet positive, effects. Beta‐diversity similar that found for assemblages separated by long distances, dominated species turnover. Multi‐site turnover (zeta diversity) suggests niche‐related mechanisms more responsible patterns than neutral mechanisms, despite significant wind‐driven dispersal thought structuring biodiversity patterns. The sizes mosses was right skewed, indicating several have very small while few larger ranges. Where ASPAs include mosses, richness varies between 1 41 species, with 65.1% (71 species) 109 known continent included ASPA network. Twenty‐four lie within 25 km 2 radius an ASPA, 14 beyond could be considered relatively difficult protect. These findings lend support proposal temperatures expanding ice‐free areas will substantially increase Antarctica's Nonetheless, reasonably well represented network, contrasting other taxa.

Language: Английский

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