Changes in the spatial relationships of selected birds in the Danubian area influenced by the Gabcikovo dam

Bohus, Mirko and Ač, Peter (1997) Changes in the spatial relationships of selected birds in the Danubian area influenced by the Gabcikovo dam. MAGYAR VÍZIVAD KÖZLEMÉNYEK, 3. pp. 177-183. ISSN 1416-1389

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Abstract

The aim of the study is to analyse the spatial relationship of selected bird species in the Danubian region (the inundation area of the Danube and the channel of Gabcikovo’s dam) influenced by the Gabcikovo dam operation. Data was obtained by the line method on the transects along an artifical channel of the dam, the main flow of the Danube and in the branch system Data was used which has been obtained in the same way every year from 1985 to 1993 for comparison with the year 1994 (the year after the start of the dam operation). The occurrence and spatial relationships of water birds in the inundation area directly depends on the water regime and its dynamics. Changes in the regime since the start of the dam operation have manifested themselves in the presence of some bird species and their preference of habitats (respective sites). Significant differences were noted in the preference of sites during seasonal cycles. In the sites with increased human contact some species reacted by limiting their flight distances.

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