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Coppes, J., J. Ehrlacher, G. Müller, K. Roth, K.-E. Schroth, V. Brau­nisch & R. Suchant

Rückgang von Bestand und Verbreitung des Auerhuhns Tetrao urogallus im Schwarzwald.

2016

113

235–248

Key words
(von 1994 bis 2006 vergeben)

Bestandsentwicklung, Bestandstrend, Balzplatz-Monitoring, Verbreitungsgebiet, Brutgebiet, Schutzmassnahmen

Schlagwort_Vogelart
(wissenschaftlich)

Tetrao urogallus

Schlagwort_Vogelart
(deutsch)

Auerhuhn

Schwarzwald, Baden-Württemberg, Deutschland

deutsch

Abhandlung

Decline in Capercaillie Tetrao urogallus numbers and distribution area in the Black Forest. – Even though Capercaillie are still present in large parts of its original range, its numbers have decreased in many parts of the Western and Central European range and in several cases, local populations have gone extinct. The Capercaillie population in the Black Forest, South-Western Germany, has undergone drastic declines in the past decades. In 1971 the number of male Capercaillie displaying at lekking sites throughout the Black Forest was counted for the first time, and since 1983 counts have been performed on a yearly basis. From 1993 onwards, all sightings and signs of Capercaillie presence have been documented and combined to create a distribution map, which is updated every five years. The lek-counts show fluctuations in the number of displaying males, but with a strong decline becoming evident over the entire study period: whereas roughly 450 males were counted between 1983 and 1994, the last count in 2016 revealed only 206 males. The decline was paralleled by a decline in range from 607 km2 in 1993 to 457 km2 in 2013. This 25 % decline is not evenly distributed in the Black Forest but is largest in the Southern and Eastern Black Forest («Süd-Schwarzwald» and «Baar-Schwarzwald») compared to the subpopulations in the Northern and Central parts of the study area. Possible causes include: habitat loss and deterioration, climate change, anthropogenic disturbance and increasing numbers of predators, most likely several of these operating in conjunction.