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Habitat filtering by landscape and local forest composition in native and exotic New Zealand birds : Habitat filtering in New Zealand birds

Barnagaud, Jean-Yves and Barbaro, Luc and Papaix, Julien and Deconchat, Marc and Brockerhoff, Eckehard G. Habitat filtering by landscape and local forest composition in native and exotic New Zealand birds : Habitat filtering in New Zealand birds. (2014) Ecology, 95 (1). 78-87. ISSN 0012-9658

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Official URL: http://dx.doi.org/10.1890/13-0791.1

Abstract

Untangling the relative influences of environmental filtering and biotic interactions on species coexistence at various spatial scales is a long-held issue in community ecology. Separating these processes is especially important to understand the influences of introduced exotic species on the composition of native communities. For this aim, we investigated coexistence patterns in New Zealand exotic and native birds along multiple-scale habitat gradients. We built a Bayesian hierarchical model, contrasting the abundance variations of 10 native and exotic species in 501 point counts spread along landscape and local-scale gradients of forest structure and composition. Although native and exotic species both occurred in a wide range of habitats, they were separated by landscape-level variables. Exotic species were most abundant in exotic conifer plantations embedded in farmland matrices, while native birds predominated in areas dominated by continuous native forest. In exotic plantation forests, and to a lesser extent in native forests, locally co-occurring exotic and native species were segregated along a gradient of vegetation height. These results support the prediction that exotic and native bird species are segregated along gradients related to anthropogenic disturbance and habitat availability. In addition, native and exotic species overlapped little in a multivariate functional space based on 10 life history traits associated with habitat selection. Hence, habitat segregation patterns were probably mediated more by environmental filtering processes than by competition at landscape and local scales.

Item Type:Article
Additional Information:Thanks to Ecological Society of America editor. The definitive version is available at http://onlinelibrary.wiley.com/ The original PDF of the article can be found at Ecology website : http://esajournals.onlinelibrary.wiley.com/hub/journal/10.1002/(ISSN)1939-9170/
ProdINRA Id:195044
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > AgroParisTech (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Aarhus Universitet (DENMARK)
Other partners > New Zealand Forest Research Institute - SCION (NEW ZEALAND)
Other partners > Université de Bordeaux (FRANCE)
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Deposited By: INRA INRA
Deposited On:24 Oct 2016 14:39

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