La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Climate change affects breeding of reed warblers Acrocephalus scirpaceus
Auteurs :	Lucyna Halupka, Auteur ; Andrzej Dyrcz, Auteur ; Marta Borowiec, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (39(1) JAN 2008)
Article en page(s) :	95-100
Langues:	Anglais
Résumé :	Between 1970 and 2006 reed warblers Acrocephalus scirpaceus started breeding progressively earlier; both the initiation of breeding (the earliest first egg dates) and peak of breeding (median first egg dates) advanced. Median first egg dates correlated significantly with increasing May-July mean temperatures. However, in contrast to other studies showing the advancement in laying dates, the end of the season did not shift. As a result, the breeding season is now longer increasing re-nesting opportunities. Individuals are able to re-nest 4-5 times, which might have important implications for the species. It was also found that in warmer seasons the population suffered fewer nest losses. Both factors, higher re-nesting potential and a trend toward fewer losses, should lead to increased fitness of individuals in the studied population.

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