La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Increase of species diversity at line transects in Southwest Germany
Auteurs :	Siegfried Schuster, Auteur ; Arne Brall, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (128(2) 2007)
Article en page(s) :	85-91
Résumé :	The breeding birds in three line transects at Lake Constance were censused between 1968 and 2001 (2004). After a strong decrease of species diversity at the beginning of the study, a constant or even increasing trend was observed since 1985. An analysis of further eight line transects at Lake Constance and 40 km north of it in the region of Rottweil showed similar patterns. In seven out of eight transects the number of species increased. It is assumed that the observed positive trend was supported by climate change, because a number of species may benefit from climate change: increased temperature can lead to advanced breeding dates resulting in higher clutch size, more replacement clutches, secondary clutches and, finally, a higher breeding success.

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