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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Matrix and habitat quality in a montane cloud-forest landscape: amphibians in coffee plantations in central Veracruz, Mexico
Auteurs :	Rene Murrieta-Galindo, Auteur ; Fabiola Lopez-Barrera, Auteur ; Alberto Gonzalez-Romero, Auteur ; Gabriela Parra-Olea, Auteur
Type de document :	Article
Dans :	Wildlife Research (40(1) 2013)
Article en page(s) :	25-35
Langues:	Anglais
Résumé :	Context. The processes of fragmentation, habitat loss, degradation and their combined effects are formidable threats to amphibian populations. Aims. We evaluate the effect of three land use-type variables and nine landscape matrix quality factors on amphibian presence in four coffee agro-ecosystems and two cloud-forest fragments in central Veracruz, Mexico. Methods. Each site was thoroughly searched using the visual-encounter survey technique along different trails in the most feasible microhabitats for detecting amphibians during four rainy seasons (2005, 2006, 2008 and 2009). Centred on the location where each amphibian species was first recorded, we established what we refer to as a buffer area within a radius of 1.5 km. A Co-Inertia mathematical model was used to determine which of the explanatory variables contributed to maintaining amphibian diversity. The landscape variables were landscape-quality index, open areas, canopy cover (low, intermediate, dense) at the matrix level, river, road and human population density and site size. Local variables were elevation, plant-structure and biological-impact indices. Key results. During the study we recorded 1078 amphibians belonging to

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