Value of an urban habitat for the native Mediterranean avifauna |
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Authors: | Sabina Amparo Caula Clélia Sirami Pascal Marty Jean-Louis Martin |
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Institution: | 1.Centre d’écologie fonctionnelle et évolutive U.M.R. 5175–CNRS,Montpellier Cedex,France;2.Instituto Venezolano de Investigaciones Científicas (IVIC),Miranda,Venezuela;3.Climate Change and BioAdaptation Division,South African National Biodiversity Institute,Cape Town,South Africa;4.Centre Fran?ais de Recherches en Sciences Sociales, USR 3138 CNRS-MAEE,Prague 2,Czech Republic |
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Abstract: | Mediterranean landscapes resulted from complex land uses that produced a mosaic of extensive crops, grasslands, scrublands
and scattered woodlands. During the twentieth century the decrease in traditional agriculture triggered a decrease in open
habitats and an increase in forests. In the meantime urban centres grew dramatically. Both spread of forest and urban areas
have been suspected to participate in the decline of typical Mediterranean bird species and, in general, to cause faunal loss.
However, modern cities offer a variety of landscape types and, in the Mediterranean, their value for native bird species has
been little assessed. We compared the bird communities from an urban landscape, including built up and natural or semi natural
units within the limits of the city of Montpellier, to the bird communities from non-urban habitats (cropland, grassland and
woodland) located nearby but away from direct urban influence. Fifty four percent of the bird species recorded in the non-urban
habitats also occurred in the urban landscape. On average, estimated species richness in the urban landscape was similar to
values obtained for non-urban habitats. Within the urban landscape species richness was lowest in the dense historical centre
and highest in the residential areas. The residential areas and urban woods were suitable habitats for most generalist species
but also for several more specialized species recorded in the non-urban habitats. Some species actually reached their highest
observation frequency in the urban landscape. Urban landscape was least favourable to the same farmland and open-habitat specialists
that have been negatively affected by agricultural abandonment in the region. Finally, five of the species common in the urban
landscape had an unfavorable conservation status in 2004 in the EU. This study emphasizes that Mediterranean urban areas have
the potential to host a diverse native bird community. Finding ways to improve their carrying capacity for the local avifauna
might be a worthwhile objective for animal conservation. |
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