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Résumé :
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In Berlin-Kreuzberg, an old city quarter with rather desolate buildings, the breeding bird community was studied on a 91 ha plot first in 1979 and again in 1991 after nearly half of the buildings had been restored or rebuilt. The results of both surveys were compared to assess the influence of restoration on the breeding avifauna. Bird species breeding on buildings have decreased drastically, e.g. Feral Pigeon Columba livia f. domestica (decrease of 75 %), House Sparrow Passer domesticus (-64 %), Starling Sturnus vulgaris (-60 %), Swift Apus apus (-25 %), and Jackdaw Corvus monedula (-20 %). On the other hand, tree-breeding species like Wood Pigeon Columba palumbus, Magpie Pica pica, and Hooded Crow Corvus corone cornix have increased. Out of a total of 23 breeding bird species on the whole plot, ten species have decreased and 13 species have increased. Five species disappeared from the plot, three species newly colonised the area. The total abundance decreased froma comparatively high level for Central Europe (239 bp/10 ha, in a section of 22,3 ha even 380.7 bp/10 ha) to an abundance which is typical for quarters with new blocks of flats (120.5 bp/10 ha). The number of species remained about the same. The restoration measures at the house fronts and the new small green courts behind the houses are evaluated from a bird conservation point of view. Finally, some protection measures for bird species breeding on buildings are proposed.
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