La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Population size, distribution and protection of black terns Chlidonias niger breeding in Schleswig-Holstein, Germany.
Auteurs :	Wilfried Knief, Auteur ; Olaf Ekeloef, Auteur ; Claus Ivens, Auteur ; Walther Petersen-Andresen, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (126(3) 2005)
Article en page(s) :	195-201
Résumé :	Like in other parts of western central Europe populations of Black Terns breeding in Schleswig-Holstein decreased by 90% during the past 50 years, the present population being 100-120 pairs. The range of Black Terns in Schleswig-Holstein also decreased. At present, the remaining breeding sites can mainly be found in the marshes along the west coast. The higher central and eastern parts of Schleswig-Holstein are more or less vacated. The main reason for the decreases seems to be loss and degradation of habitats. In particular different types of small wetlands that are not inhabited by other water birds disappeared or were degraded. These wetlands had posed an amphibious character to the landscape. Transformation of grassland to arable land and intensification of agriculture on grasslands might also have played a role. Measures for developing suitable habitats and protection of Black Terns are proposed.

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