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Effects of landscape heterogeneity on population genetic structure and demography of Amazonian phyllostomid bats

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Abstract

Anthropogenic landscape changes resulting in habitat degradation, loss and fragmentation might decrease connectivity and effective sizes of wild populations, threatening local biodiversity. Assumed large distributions of both species and habitats have probably discouraged studies correlating altered landscapes’ structure and composition to patterns of genetic diversity in the Neotropics. Yet, considering the increasingly high rates of deforestation and habitat conversion in Amazonia, investigating local and regional-scale effects of habitat conversion on Amazonian mammals is of paramount importance. Here, we use widespread, non-threatened, phyllostomid bats to understand how current forest dynamics are influencing genetic diversity patterns and functional connectivity of eastern Amazonian volant mammals. Four frugivorous species, Carollia perspicillata, Rhinophylla pumilio, Dermanura gnoma and Artibeus obscurus, were sampled across a heterogeneously fragmented region. Twelve more or less isolated rainforest remnants surrounded by urban areas, pastures, crops, secondary forests and other land uses comprise the studied landscapes, and are compared using a landscape genetics approach applied to mitochondrial DNA loci. Here, we report species-specific consequences of habitat fragmentation. Although the overall levels of genetic diversity were high, our data show that (i) population structure is heterogeneous across the altered landscapes; (ii) landscapes with higher habitat availability harbour populations with higher genetic diversity; and (iii) the populations assessed might be demographically declining.

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Acknowledgements

We thank the staff of the Laboratory of Molecular Biology of Museu Paraense Emílio Goeldi (MPEG) and MPEG for laboratory support through resources from the FINEP grant “Parque analítico do MPEG: Análise das transformações da Amazônia e seus reflexos na sociobiodiversidade e na paisagem” (grant no. 0118003100). We also acknowledge Bat Conservation International for funding laboratory procedures. Fieldwork was financed by the project “Programa Institutos Nacionais de Ciência e Tecnologia - Uso da Terra e Biodiversidade na Amazônia” (grant no. 384368/2009-3). We appreciate the comments and suggestions of the editor and anonymous reviewers who helped to improve this manuscript. SMS was funded by a Programa Nacional de Pós-Doutorado/Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (PNPD/CAPES) fellowship at Programa de Pós-Graduação em Zoologia/MPEG – Federal University of Pará and a Pós-Doutorado Júnior/Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) fellowship (no. 150657/2017-0) at MPEG. LCT was awarded a PhD studentship by CAPES.

Funding

Bat Conservation International; Programa Institutos Nacionais de Ciência e Tecnologia - Uso da Terra e Biodiversidade na Amazonia (grant no. 384368/2009-3); Programa Nacional de Pós-Doutorado/Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; Conselho Nacional de Desenvolvimento Científico e Tecnológico; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.

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Correspondence to Sofia Marques Silva or Leonardo Carreira Trevelin.

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The authors declare that they have no conflict of interest.

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Communicated by: Jeremy Herman

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Silva, S.M., Ferreira, G., Pamplona, H. et al. Effects of landscape heterogeneity on population genetic structure and demography of Amazonian phyllostomid bats. Mamm Res 66, 217–225 (2021). https://doi.org/10.1007/s13364-020-00546-3

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  • DOI: https://doi.org/10.1007/s13364-020-00546-3

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