La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Current contamination of Common Terns Sterna hirundo with environmental chemicals in Central Europe
Auteurs :	Peter H. Becker, Auteur ; Ute Sommer, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (119(3-5) 1998)
Article en page(s) :	243-249
Résumé :	We studied concentrations of environmental chemicals in Common Tern eggs collected in 1995 at 11 marine and freshwater sites in Central Europe (Warta, Poland: 1990). For all substances studied significant between-site differences were found: highest concentrations of industrial chemicals were recorded in the western colonies (mercury, HCB: Elbe estuary; PCBs: Lower Rhine and Weser), insecticide contamination was highest at the Warta river, Poland (DDE, HCH). Pollutant concentrations were higher in eggs laid at rivers than in those laid at Wadden Sea islands. Temporal trends of pollutant concentrations in eggs from the Elbe river mouth were significantly negative from 1981 to 1996 except for DDE. PCBs at the Rhine, DDE at the Warta and mercury at the Elbe reached levels known to potentially affect reproductive success.

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