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Gewählte Master / Diploma Thesis:

Frederik Sachser (2014): "KLEINRÄUMIGE HABITATNUTZUNGSANALYSE DES BIRKHUHNS Tetrao tetrix IM BEREICH DES ÖSTLICHEN VERBREITUNGSRANDES DER ALPENPOPULATION AM SÜDHANG DER GLEINALM (STEIERMARK)".
Master / Diploma Thesis - Institut für Wildbiologie und Jagdwirtschaft (IWJ), BOKU-Universität für Bodenkultur, pp 54. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The present paper focuses on habitat use of black grouse, which is a characteristic species along the tree line. In order to reduce disturbance during fieldwork the presence of black grouse is represented by indirect signs of presence such as feathers or droppings. Besides analysing the most important habitat parameters at the southeastern geographic range boundary using logistic regression the results were compared with already existing habitat models. The following parameters are of special importance for black grouse at the southeastern geographic range boundary: 1 dwarf shrub height 2 dwarf shrub cover 3 patchiness 4 canopy cover >5 m 5 forest canopy gaps >10 m As a result of the comparison with similar studies of Immitzer (2011) and Schweiger (2010) the first four parameters seem to be relevant for occurence probability of black grouse at different study sites. Additionally the results were used to examine the validity of an existing HSI model for black grouse (Immitzer, 2011). Considering the variable selection and the calibration of SI values this kind of evaluation procedure provides a first attempt to enhance the generality of HSI models. Based on the collected data certain suggestions can be made to adjust the HSI model but should be particularly reviewed in further studies. The results indicate that mechanistic as well as statistic models basically could be transferred on different alpine black grouse populations.

Beurteilende(r): Hackländer Klaus
1.Mitwirkender: Nopp-Mayr Ursula

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