Rückgang von Bestand und Verbreitung des Auerhuhns Tetrao urogallus im Schwarzwald

Coppes, Joy; Ehrlacher, Judith; Müller, Gerrit; Roth, Klaus; Schroth, Karl-Eugen; Braunisch, Veronika; Suchant, Rudi (2016). Rückgang von Bestand und Verbreitung des Auerhuhns Tetrao urogallus im Schwarzwald. Der Ornithologische Beobachter, 113(3), pp. 235-248. Ala, Schweizerische Gesellschaft für Vogelkunde und Vogelschutz

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Conservation Biology

UniBE Contributor:

Braunisch, Veronika

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)

ISSN:

0030-5707

Publisher:

Ala, Schweizerische Gesellschaft für Vogelkunde und Vogelschutz

Language:

German

Submitter:

Olivier Roth

Date Deposited:

21 Jun 2017 10:02

Last Modified:

21 Jun 2017 10:02

BORIS DOI:

10.7892/boris.93729

URI:

https://boris.unibe.ch/id/eprint/93729

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