Community richness and stability in agricultural landscapes: The importance of surrounding habitats |
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Authors: | Vincent Devictor Frederic Jiguet |
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Institution: | aCentre de Recherches sur la Biologie des Populations d’Oiseaux, UMR 5173 ‘Conservation des Espèces, Restauration et Suivi des Populations’, Muséum National d’Histoire Naturelle, 55 rue Buffon, 75005 Paris, France |
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Abstract: | In this paper, the role played by habitat diversity in the landscape on species richness and on the stability of farmland bird communities was investigated. Species richness was estimated on 374 samples monitored in farmland by the French breeding bird survey during the 2001–2005 period. A capture–recapture approach was used to estimate species richness accounting for the variation in detection probability among species of the 100 most common species detected in farmland. Landscape structure and composition were measured both in farmland and in adjacent habitats. The independent effect of each variable on community richness and stability was further assessed using hierarchical variance partitioning and taking spatial autocorrelation into account. A strong matrix effect was detected: non-cropped land deeply influenced richness and stability of bird assemblages. |
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Keywords: | Agricultural landscape Bird Breeding bird survey Community dynamics Detectability Matrix effect Spatial analysis Mixed models |
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