Ábrahám Levente (szerk.): Válogatott tanulmányok VII. - Natura Somogyiensis 22. (Kaposvár, 2012)

Winkler D. - Erdő Á.: A comparative study of breeding bird communities in representative habitats of the Sárosfő Nature Reserve area

Winkler D. & Erdő A.: Breeding bird communities

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tropical migrants

■ short-distance migrants

■ sedentary species

rcedbed meadow afforestation 03 ^ forest ash-alder forest pine forest

Fig. 5: Classification of bird communities according to the species' migratory habits

The analysis of bird communities according to the migratory habits of the species showed interesting results (Fig. 5). The observed trend is true for both the species richness and density.

The proportion of sedentary species is higher primarily in the forest habitats (reaching its peak in the turkey oak-pedunculate oak forest) while, similarly to other studies (Herrera 1978, Helle & Fuller 1978), the cumulated proportion of migrant species (both short-distant and tropical migrants) was higher rather in the open habitats. A probable explanation of this phenomenon might be that the surveyed open habitats (e.g. young afforestations) are showing certain similarities with the wintering areas of the actual species: the open savannas and semi-deserts (Blicke 1984).

Taking into account the results of the breeding bird survey, the following remark can be drawn as a conclusion. This relatively small area around the artificial lakes has a rich mosaic habitat structure which is optimal not only for waterfowl linked to the fishponds but also for passerine bird communities.

Acknowledgements

We would like to thank Gergő Nagy and László Peer (Bakonyerdő Forestry and Forest-Products Private Corporation) for their kind help.