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From pastures to salt marshes - changes in the breeding bird community of the Leybucht caused by the abandonment of utilization Von der Hellerweide zur Salzwiese - Veraenderung der Brutvogelgemeinschaft in der Leybucht durch die Nutzungsaufgabe



From pastures to salt marshes - changes in the breeding bird community of the Leybucht caused by the abandonment of utilization Von der Hellerweide zur Salzwiese - Veraenderung der Brutvogelgemeinschaft in der Leybucht durch die Nutzungsaufgabe



Vogelkundliche Berichte aus Niedersachsen. Dezember; 352: 157-166



In the framework of the surveys accompanying the coastal protection measure "Leybucht" the data on breeding birds were analysed with respect to the alterations of utilisation between 1990 and 2002. Especially the songbirds Reed Bunting (Emberiza schoeniclus), Meadow Pipit (Anthus pratensis) and Wagtail (Motacilla flava flava) showed positive trends due to the reduction or abandonment of grazing. Among the waders the Redshank (Tringa totanus) profits from the abandonment of utilisation. However, the Black-tailed Godwit (Limosa limosa) and the Northern Lapwing (Vanellus vanellus) clearly had lower abundances in the non-utilized areas than in the grazed ones. Also Oyster-catcher (Haematopus ostralegus) showed a reduced abundance in the non-utilized areas. The disappearance of the formerly dominant breeding species Black-headed Gull (Larus ridibundus) and Avocet (Recurvirostra avosetta) seems not to be caused by the abandonment of the utilisation, but presumably by predators like Red Fox. Concerning the aim to re-establish the salt marshes in the Leybucht, an intermediate stage is reached by now, which could be called a "Hellerbrache" (fallow salt marsh pasture).

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