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Title of Journal: Conserv Genet

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Abbravation: Conservation Genetics

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Springer Netherlands

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DOI

10.1007/978-3-642-02454-2_29

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1572-9737

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Landscapelevel comparison of genetic diversity an

Authors: Niko Balkenhol Renata Pardini Cintia Cornelius Fabiano Fernandes Simone Sommer
Publish Date: 2013/02/08
Volume: 14, Issue: 2, Pages: 355-367
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Abstract

Habitat loss and fragmentation can have detrimental effects on all levels of biodiversity including genetic variation Most studies that investigate genetic effects of habitat loss and fragmentation focus on analysing genetic data from a single landscape However our understanding of habitat loss effects on landscapewide patterns of biodiversity would benefit from studies that are based on quantitative comparisons among multiple study landscapes Here we use such a landscapelevel study design to compare genetic variation in the forestspecialist marsupial Marmosops incanus from four 10000hectare Atlantic forest landscapes which differ in the amount of their remaining native forest cover 86 49 31 11  Additionally we used a model selection framework to evaluate the influence of patch characteristics on genetic variation within each landscape We genotyped 529 individuals with 12 microsatellites to statistically compare estimates of genetic diversity and genetic differentiation in populations inhabiting different forest patches within the landscapes Our study indicates that before the extinction of the specialist species here in the 11  landscape genetic diversity is significantly reduced in the 31  landscape while genetic differentiation is significantly higher in the 49 and 31  landscapes compared to the 86  landscape Results further provide evidence for nonproportional responses of genetic diversity and differentiation to increasing habitat loss and suggest that local patch isolation impacts gene flow and genetic connectivity only in the 31  landscape These results have high relevance for analysing landscape genetic relationships and emphasize the importance of landscapelevel study designs for understanding habitat loss effects on all levels of biodiversityThis study is part of the GermanBrazilian research project BIOCAPSP ‘Biodiversity conservation in fragmented landscapes on the Atlantic Plateau of São Paulo’ and was funded by the German Federal Ministry of Education and Research BMBF 01 LB 0202 01 LB 0202B PI Simone Sommer the National Council for Scientific and Technological Development CNPq 690144/016 and São Paulo Research Foundation FAPESP 05/565554 We are grateful to Jean Paul Metzger Christoph Knogge and Klaus Henle for logistic support We would like to thank Anke Schmidt and Ramona Taubert for assistance in the genetic laboratory analyses and Adriana A Bueno Thomas Püttker Fabiana Umetsu Bruno T Pinotti and field assistants for helping with field work The comments and suggestions of the associate editor Craig Primmer and two anonymous referees considerably improved the manuscript

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