La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Long-term population trends of common breeding birds in the city of Hamburg, Northern Germany
Auteurs :	Alexander Mitschke, Auteur ; Stefan Garthe, Auteur ; Ronald Mulsow, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (121(2-3) 2000)
Article en page(s) :	155-164
Résumé :	Studies of the long-term population development of common breeding birds in the urban environment are scarce. We studied 15 census plots in the city of Hamburg in the 1990s, all of which had been investigated for the first time in the 1960s or 1970s. Main emphasis was put on the plots near the centre of the town and in parks. The strongest population increase based on the density medians over all census plots were found in Magpie Pica pica and Jay Garrulus glandarius (10-fold increase). Coal Tit Parus ater populations showed an 8-fold increase, those of Wren Troglodytes troglodytes, Robin Erithacus rubecula, European Nuthatch Sitta europaea and Great Spotted Woodpecker Dendrocopos major 4- to 5-fold increases. Populations of Chiffchaff Phylloscopus collybita, Blackcap Sylvia atricapilla, Carrion Crow Corvus c. corone, and Blue Tit Parus caeruleus increased about 2- to 2,5-fold. Of the group of the most common bird species, the Blackbird Turdus merula population increased by

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