How does forest species specialization affect the application of the island biogeography theory in fragmented landscapes
作者： Olivia Dondina , Valerio Orioli , Pamela D'Occhio , Massimiliano Luppi , Luciano Bani
DOI: 10.1111/JBI.12827
关键词:
摘要: Aim Overall species richness in habitat remnants is seldom explained by the island biogeography theory (IBT). In this study, we tested effectiveness of IBT explaining forest birds with or without considering effect different specialization (generalist, edge and interior; community analysis). We also identified single groups that could serve as indicators fragmentation degrees (indicator analysis). Location Broadleaved forests western Lombardy (northern Italy). Methods We evaluated bird 344 fragments. Fragment area (FA), distance from nearest source (> 1000 ha) (DSA) number neighbouring fragments (NF) were calculated for each fragment. Using Poisson generalized linear models, compared a model relationships between fragment covariates to considered on relationship. Moreover, investigated association particular conditions calculating IndVal index. Results The application performed significantly better if took into account when evaluating covariates. particular, positive effects FA NF negative DSA stronger interior rather than generalist species. index six three strongly associated specific degrees. Main conclusions The results showed strong influence their distribution fragmented landscapes. Interior best candidates proxy effects. However, indicator analyses revealed not all same sensitivity
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