La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	[The development of a local population of the Common Sandpiper Actitis hypoleucos on the Upper Main River after river restoration: The impact of flooding processes.]
Auteurs :	Juergen Metzner, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (41(1) April, 2002)
Article en page(s) :	41-49
Résumé :	Since 1992, numerous sections of the Main river and its tributary, the Rodach in Upper Franconia (Germany) have been restored by removing large stones which stabilized the banks. Since these measures were taken, areas are only influenced by flooding processes and the river now changes its channel irregularly. The results are a significant enhancement in structural diversity and a highly dynamic occurrence of habitat patches. The re-establishment of a primary habitat for Common Sandpiper demonstrates new perspectives for population development of this highly threatened species. In 2001, surveys on Upper Main and Rodach revealed 3 breeding pairs and 4 presumed breeding pairs in restored areas. Altogether 4 restored areas have served as breeding areas within the past three years. Another 4 areas seem highly likely to be breeding areas. In 2001, no successful broods were recorded in regulated river sections, e.g. downstream of bulwarks. In future, the number of suitable habitats for the Common Sandpiper along the Upper Main river may further increase. A challenge in the protection of this species will be the handling of anthropogenic disturbances.

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