La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Recent increase in waterbirds in Picardy (West France) (2010)
Auteurs :	F Sueur, Auteur
Type de document :	Article
Dans :	Alauda (78(2) juin, 2010)
Article en page(s) :	315-320
Résumé :	Old and recent studies on breeding waterbirds in Picardy enable to present a history of these birds from the 19th onwards to the beginning of the 21 st century. A strong increase in species numbers is observed between 1 800-1950 (48 species) and 1950-2010 (78-81 species). A similar increase is noted elsewhere at regional (Camargue, Burgundy), national and European scales. The new breeding birds are those linked to large open waterbodies or generalists with large territories whereas those linked to shallow wetlands (meadows and reedbeds) tend to decrease. I hese changes are clearly linked to the creation of large and relatively stable waterbodies (gravel pits, reservoirs), better species protection, general eutrophication of wetlands and global warming. This phenomenon also occurred in other taxa (plants, invertebrates, fishes and amphibians). The increase of local diversity is mainly the result of invasive species and the erosion that of loss of specialized species.

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