The Role of Forest Age, Habitat Quality, Food Resources and Weather Conditions for Tawny Owl Strix aluco Populations
Jarosław Wiącek1, Marcin Polak1, Grzegorz Grzywaczewski2
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1Department of Nature Conservation, Maria Curie-Skłodowska University,
Akademicka 19, 20-033 Lublin, Poland,
2Department of Zoology, University of Life Sciences in Lublin,
Akademicka 13, 20-950 Lublin, Poland
Pol. J. Environ. Stud. 2010;19(5):1039–1043
The main goal of this study was to determine the reason for the significant increase of the tawny owl Strix aluco population in Kozłówka Forest near Lubartów (51°30' N, 22°35' E) in eastern Poland. Since 1990, this forest complex has been part of Kozłowiecki Landscape Park. Our research was conducted using standard playback method on a sample plot covering 50 km2. Each year in March and April 1990-91 and 2007-09, three counts with vocal stimulation were performed on the study plot. Between 1991 and 2009, a significant increase in the density of the tawny owl population was observed from 2.4 pairs/10 km2 to 4.6 pairs/10 km2. We discuss how habitat quality, food availability, and weather conditions can explain this phenomenon.