La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Large-scale development of Marsh Harrier Circus aeruginosus population and influencing factors in the Feldberger Seenlandschaft in north-eastern Germany
Auteurs :	Markus Lange, Auteur ; Peter Wernicke, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (135(3) 2015)
Article en page(s) :	95-108
Résumé :	The results of a survey of Marsh Harriers in an area of about 309 km(2) in central Mecklenburg-Western Pomerania in 2011, their variation in comparison to an earlier survey in the mid 1990s, and the influencing factors are presented. The population was still at a very high level. Especially in reed beds of lakes the birds used occupied territories over many years. In small water bodies there have been more changes of nest-sites. Variation in reed structure and water level where important parameters for occupation or abandonment of breeding sites.There were a lot of changes in agricultural use in the study area between the two survey periods. Especially grassland strongly decreased, mainly caused by the abolishment of set-asides. On the other hand, there was an increase of arable land, especially maize and cereal. But there was no correlation to the usage of breeding sites by Marsh Harriers.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...