Correlates of different facets and components of beta diversity in stream organisms
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2019
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Recently, community ecology has emphasized the multi-facetted aspects of biological diversity by linking species traits and
the environment. Here, we explored environmental correlates of taxonomically-based and traits-based compositional distances
using a comprehensive data set of diatom and macroinvertebrate communities. We also explored the responses of diferent
beta diversity components (i.e., overall beta diversity, turnover, and nestedness) of beta diversity facets (i.e., taxonomically
and traits-based beta diversity) to environmental distances. Partial Mantel tests were used to test the relationships between
beta diversity and environmental distance (while controlling for spatial distances). Taxonomically-based beta diversity
varied much more than traits-based beta diversity, indicating strong functional convergence. We found that taxonomicallybased beta diversity was largely driven by the turnover component. However, the nestedness component contributed more
to overall traits-based beta diversity than the turnover component. Taxonomically-based beta diversity was signifcantly
correlated with environmental distances for both diatoms and macroinvertebrates. Thus, we found support for the role of
environmental fltering as a driver of community dissimilarities of rather diferent biological groups. However, the strength
of these relationships between beta diversity and environmental distances varied depending on the biological group, facet,
component, and the way which the environmental variables were selected to calculate the explanatory (distance) matrix.
Our results indicated that both taxonomically and traits-based approaches are still needed to better understand patterns and
mechanisms afecting the organization of biological communities in streams. This is because diferent facets of biological
communities may be driven by diferent mechanisms.
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Beta diversity, Traits, Biodiversity facets, Taxonomy, Taxonomy, Environmental gradients
Citação
ROCHA, Mariana Perez et al. Correlates of different facets and components of beta diversity in stream organisms. Oecologia, Berlim, v. 191, p. 919-929, 2019. DOI: 10.1007/s00442-019-04535-5. Disponível em: https://link.springer.com/article/10.1007/s00442-019-04535-5. Acesso em: 5 jul. 2023.