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7 results for “species β-diversity”
Data from: Species-environment sorting explains latitudinal patterns in spatiotemporal β-diversity for freshwater macroinvertebrates
<p>Understanding how and why β-diversity varies along latitude is a long-standing challenge in community ecology and rarely addressed in both space and time. We aimed to explore the spatiotemporal variations in macroinvertebrate β-diversity and their underlying drivers in eight biogeographic regions covering a substantial latitudinal gradient of more than 40 degrees. By combining β-diversity partitioning and distance decay of community similarity analyses, we found that subtropical β-diversity varies more in space relative to in time compared with temperate β-diversity, as we predicted. This is probably because subtropical β-diversity is shaped by species-environment sorting (SS), caused by habitat heterogeneity and species specialization, more strongly in space relative to in time than temperate β-diversity. Our study highlights the importance of SS in shaping latitudinal gradients of β-diversity in space and time.</p>
Data from: Species-environment sorting explains latitudinal patterns in spatiotemporal β-diversity for freshwater macroinvertebrates
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The proportion of low abundance species is a key predictor of plant β-diversity across the latitudinal gradient
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Data from: A phylogenetic perspective on species diversity, β-diversity, and biogeography for the microbial world
There is an increasing interest to combine phylogenetic data with distributional and ecological records to assess how natural communities arrange under an evolutionary perspective. In the microbial world there is also a need to go beyond the problematic species definition to deeply explore ecological patterns using genetic data. We explored links between evolution/phylogeny and community ecology using bacterial 16S rRNA gene information from a high altitude lakes district dataset to describe phylogenetic community composition, spatial distribution, and β-diversity and biogeographical patterns applying evolutionary relatedness without relying on any particular operational taxonomic unit definition. High altitude lakes districts usually contain a large mosaic of highly diverse small water bodies and conform a fine biogeographical model of spatially close but environmentally heterogeneous ecosystems. We sampled eighteen lakes in the Pyrenees with a selection criteria focused on capturing the maximum environmental variation within a small geographical area. The results showed highly diverse communities non-randomly distributed with phylogenetic β-diversity patterns mainly shaped by the environment and not by the spatial distance. Community similarity based on both bacterial taxonomic composition and phylogenetic β-diversity approach shared similar patterns and were primarily structured by similar environmental drivers. We observed a positive relationship between lake area and phylogenetic diversity with a slope consistent with highly dispersive planktonic organisms. The phylogenetic approach incorporated patterns of common ancestry into bacterial community analysis and emerged as a very convenient analytical tool for direct inter- and intrabiome biodiversity comparisons and sorting out microbial habitats with potential application in conservation studies for microorganisms.
Data from: Species pool functional diversity plays a hidden role in generating β-diversity
Functional trait diversity is used as a way to infer mechanistic processes that drive community assembly. While functional diversity within communities is often viewed as a response variable, here we present and test a framework for how functional diversity among taxa in the regional species pool drive the assembly of communities among habitats. We predicted that species pool functional diversity should work with environmental heterogeneity to drive β-diversity. We tested these predictions by modeling empirical patterns in invertebrate communities from 570 streams in 52 watersheds. Our analysis of the field data provided strong support for the inclusion of both functional diversity and environmental heterogeneity in the models, and our predictions were supported when the community was analyzed all together. However, analyses within individual functional feeding guilds revealed strong context dependency in the relative importance of functional diversity, γ-richness, and environmental heterogeneity on β-diversity. We interpret the results to mean that functional diversity can play an important role in driving β-diversity; however, within guilds the nature of interspecific interactions and species pool size complicate the relationship. Future research should test this conceptual model across different ecosystems and in experimental settings using metacommunity mecocosms to enhance our understanding the role that functional variation plays in generating spatial biodiversity patterns.
Data from: Species pool functional diversity plays a hidden role in generating β-diversity
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Data from: A phylogenetic perspective on species diversity, β-diversity, and biogeography for the microbial world
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