La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Creating new foraging opportunities for dark-bellied brent Branta bernicla and barnacle geese Branta leucopsis in spring insights from a large-scale experiment
Auteurs :	D. Bos, Auteur ; J. Stahl, Auteur
Type de document :	Article
Dans :	Ardea (91(2) FAL 2003)
Article en page(s) :	153-165
Résumé :	The implementation of a new non-disturbance policy on Schiermonnikoog (Dutch Wadden Sea islands) provided an experiment to test ideas concerning the switch between habitats by spring-staging Dark-bellied Brent Geese Branta bernicla and Barnacle Geese B. leucopsis. In the experimental years (2000 and 2001) the farmers desisted from all scaring activities in the enclosed pasture area (290 ha) with grasslands intensively managed for dairy farms. The adjoining salt marsh (1635 ha) already was afforded complete protection, and traditionally provided the main goose feeding area in spring. A traditional habitat switch to the marsh coincides with the spring increase of forage production in the marsh habitat, suggesting that forage availability on the marsh is limiting in early spring. Compared to three control years (1997, 98 and

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