Diminishing influence of negative relationship between species richness and evenness on the modeling of grassland α-diversity metrics

Frontiers in Ecology and Evolution, Journal Year: 2023, Volume and Issue: 11

Published: March 3, 2023

Species richness and evenness have been widely used to investigate the spatiotemporal variation of α-diversity. However, some studies indicated that a negative relationship exists between species evenness. The question is how differing sensitivity α-diversity metrics interactive behavior affect modeling variation. Here, we explored response diversity, represented by three Hill numbers (i.e., richness, exponential Shannon index – expShannon, inverse Simpson invSimpson) focusing on abundance rare common species, Pielou underlining community, through structural equation (SEM). model scheme integrated categories variables, spectral hypothesis (SVH), community pattern, vertical structure, along precipitation gradient spanning steppes, including meadow steppe, typical desert steppe. Our results showed there were large differences in across with v-shaped patterns emerging (low-point steppe). Differences steppes diminished expShannon or invSimpson indices, though persisted. opposite peak Accordingly, was found steppes. concurrent increases annual number dominant variations led relationship. As result, SEM fitness indices over region substantially Overall, pattern better explained indices. performance SVH differed among due collinearity variables structure. This study emphasizes variability environmental change. Particularly, distinguishing asynchronous behaviors paramount account for heterogeneous ecosystems.

Language: Английский

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Alien flora causes biotic homogenization in the biodiversity hotspot regions of India

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 884, P. 163856 - 163856

Published: May 3, 2023

Language: Английский

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Critical role of multidimensional biodiversity in contributing to ecosystem sustainability under global change

Geography and sustainability, Journal Year: 2023, Volume and Issue: 4(3), P. 232 - 243

Published: May 13, 2023

The 21st century has seen an acceleration of global change, including climate elevated carbon dioxide, nitrogen deposition, and land-use intensification, which poses a significant threat to ecosystem functioning. Nevertheless, studies on the relationship between biodiversity functioning (BEF) have consistently demonstrated that enhances its stability, even in variable environmental conditions. These findings potentially indicate critical role promoting sustainable provisioning under change. Our paper provides comprehensive review current BEF research response multiple change factors. We demonstrate (1) assessing effects requires consideration dimensions diversity, such as diversity across trophic levels (plants, animals, microbes), facets (taxonomy, functional traits, phylogeny), spatial scales (local, regional, landscape scales). (2) interaction factors may lead greater reduction than single factor. (3) Multidimensional regulates factors, indicating high multidimensional can mitigate negative impacts Overall, we emphasize recognizing importance is for sustaining Therefore, prioritizing conservation efforts maintain enhance all essential address challenges future

Language: Английский

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Diversity–stability relationships across organism groups and ecosystem types become decoupled across spatial scales

Ecology, Journal Year: 2023, Volume and Issue: 104(9)

Published: July 4, 2023

The relationship between biodiversity and stability, or its inverse, temporal variability, is multidimensional complex. Temporal variability in aggregate properties, like total biomass abundance, typically lower communities with higher species diversity (i.e., the diversity-stability [DSR]). At broader spatial extents, regional-scale also regional (in plant systems) synchrony. However, focusing exclusively on properties of may overlook potentially destabilizing compositional shifts. It not yet clear how related to different components across scales, nor whether DSRs emerge a broad range organisms ecosystem types. To test these questions, we compiled large collection long-term metacommunity data spanning wide taxonomic groups (e.g., birds, fish, plants, invertebrates) types deserts, forests, oceans). We applied newly developed quantitative framework for jointly analyzing scales. quantified composition local metacommunities. scale, more diverse were less variable, but this effect was stronger than properties. found no stabilizing γ-diversity β-diversity played strong role reducing synchrony, which reduced variability. Spatial synchrony differed among taxa, suggesting differences stabilization by processes. strongly driven Across our results suggest that high does consistently stabilize at scales without sufficient reduce

Language: Английский

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Scale-dependent changes in ecosystem temporal stability over six decades of succession

Science Advances, Journal Year: 2023, Volume and Issue: 9(40)

Published: Oct. 6, 2023

A widely assumed, but largely untested, tenet in ecology is that ecosystem stability tends to increase over succession. We rigorously test this idea using 60-year continuous data of old field succession across 480 plots nested within 10 fields. found temporal increased at the larger scale (γ stability) not local plot (α stability). Increased spatial asynchrony among fields γ stability, while increases species and decreases offset each other, resulting no α scale. Furthermore, we a notable positive diversity-stability relationship scale, with associated increasing functional diversity later Our results emphasize importance assessing time how it relates biodiversity.

Language: Английский

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