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How do bat, rodent, and marsupial communities respond to spatial and environmental gradients? Insights from a deconstruction of mammal beta diversity from the Atlantic Forest of South America

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Abstract

Space and environment are fundamental in influencing the community structure. However, their relative influences vary according to species’ biological characteristics. Here we test whether differences in life-history traits mainly linked to dispersal abilities influence bat, rodent and marsupial beta diversity along spatial and environmental gradients. We expect bat beta diversity to be weakly related with space in comparison to dispersal-limited rodents and marsupials. Using data from communities distributed along the Atlantic Forest of South America, we calculated the total beta diversity and its turnover and nestedness components for each group. We estimated the strength of correlation of beta diversity and its components along spatial and environmental gradients, comparing their importance within and between groups. Space had the higher influence on rodent and marsupial beta diversity. For bats, both gradients influenced similarly their community composition. Between taxa, the influence of these gradients did not differ for rodents and marsupials, while bats presented a stronger relationship with environment compared to non-volant small mammals. Also, all groups presented a similar influence of the spatial gradients on their community structure, despite their differences in dispersal abilities. Our results suggest that differences in biological characteristics partially influence the community structure of these mammals, with their responses along space likely reflecting similar biogeographical dynamics affecting their distribution. Overall, our results improve the understanding of the processes structuring these communities, highlighting the benefits of comparative analyses within a beta diversity perspective to better understand the influence of multiple processes on the community assembly along geographical gradients.

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Acknowledgements

We thank Sidney F. Gouveia for suggestions on an early version of this manuscript. We extend our most sincere acknowledgements to all researchers that collected data on these mammal assemblages in the field, and to all researchers that jointed efforts to make these data available as part of the “Atlantic-datasets: beyond distribution maps” project.

Funding

LHV and CSL received scholarships from the Brazilian Coordination for the Improvement of Higher Education Personnel (CAPES). MOM (309154/2014-6) and FCP (307303/2017-9) received support from the Brazilian National Council for Scientific and Technological Development (CNPq).

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LHV, MOM and FCP conceived the ideas. LHV and CSL collected the data. LHV performed statistical analysis. LHV led the writing with substantial contribution from all authors.

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Correspondence to Luiz H. Varzinczak.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors. For this type of study formal consent is not required.

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Communicated by Mathew Samuel Crowther.

Testing hypotheses with community data in a macroecological context and based on solid theory is essential to understand the factors underlying the community structure along geographical gradients.

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Varzinczak, L.H., Moura, M.O., Lima, C.S. et al. How do bat, rodent, and marsupial communities respond to spatial and environmental gradients? Insights from a deconstruction of mammal beta diversity from the Atlantic Forest of South America. Oecologia 189, 851–861 (2019). https://doi.org/10.1007/s00442-018-4288-y

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  • DOI: https://doi.org/10.1007/s00442-018-4288-y

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