Janus Pannonius Múzeum Évkönyve 28 (1983) (Pécs, 1984)

Természettudományok - Uherkovich, Ákos: Lepidoptera on birch and alder in South and West Transdanubia, Hungary

LEPIDOPTERA ON BIRCH AND ALDER 47 occur in every small alder-group. The alder wider distributed than the birch and its moths can be found on more points, too (Fig. 27). In earlier papers (Uherkovich 1981c, 1984) I wrote about some species which seem to be in expanding. The situation for expansion is favourable for these forest-dwelling species. The area of South Transdanubia is covered with large and old forests with original or close to original plant communities. They give optimum conditions of growing of the discussed species. During unfavourable periods of climate fluctuation their population can get contracted and survive these periods. If conditions improve, these small, contracted populations can grow and reach their original extension within some decaded. According to my own opinion, the trend of nowadays is of the expansion. The direction of recent climate changes - strenghtening of Atlantic effects - helps this process. Therefore many wetfavouring, forest-dwelling species begun to spread over twenty or twenty-five years ago, their populations have become strong and widespread, and the individuals have multiplied. The capturing of some new members of domestic moth fauna maybe the result of this trend. On the other hand, this climate changes cause the rarefying or vanishing of some moths and butterflies which do not favour „Atlantic" types of climate. They are on forest-dwellers but like aridity, and belong mostly to the Mediterranean types of distribution. Acknowle dgements I wish to thang Miss K. Leskó, Mr. A. Ambrus and Mr. B. Herczig for surrendering some distribution data and Dr. Z. Varga for supervising of my MS and completing of data. Balogh, I. (1978): A Mecsek hegység lepkefaunája. [The Lepidoptera Fauna of Mecsek Mountains]. (Lepidoptera) - Folia ent. Hung. 31: 53-78. Fazekas, I. (1979) : Untersuchungen über die Makrolepidopterenfauna des östlichen Teiles des MecsekGebirges (SW-Ungarn) III. Die Makrolepidopteren des Arboretums von Püspökszentlászló und seiner Umgebung. - J. Pannonius Múzeum Évk. 23 (1978) : 71-86. Forster, W.-Wohlfahrt, Th. A. (1960): Die Schmetterlinge Mitteleuropas, Band III. Spinner und Schwärmer. - Stuttgart. Forster, W.-Wohlfahrt, Th. A. (1970): Die Schmetterlinge Mitteleuropas, Band IV. Eulen. - Stuttgart. Forster, W.-Wohlfahrt, Th. A. (1973-1980): Die Schmetterlinge Mitteleuropas, 24-30. Lieferungen. Spanner. - Stuttgart. Fig. 27. The isohyets of 600 and 800 mm annual precipitation on the examined are (A) and the border of humid forests (2) and the oak-hornbeam zone (1) in South and West Transdanubia (B) 21. âbra. A 600 és 800 mm-es évi csapadékmennyiség görbéje (A), valamint a humid erdőterületek (2) és a gyertyános-tölgyes zóna határa (1) a Dél- és NyugatDunántúlon. Herczig, B.-Ronkay, L.-Szabóky, Cs. (1980): Data to the knowledge of the natural foodplants of Lepidopterous larvae in Hungary. - Folia ent. hung. 41 : 67-73. Hruby, К. (1960) : Prodromus Lepidopterorum Slovaciae. - Bratislava. Issekutz, L. (1956) : Neuheiten in der ungarischen Gross-Schmetterlingensfauna. - Folia ent. hung. 9: 173-186. Issekutz, L. (1971) : Die Schmetterlingsfauna des südlichen Burgenalndes. Teil I. Macrolepidoptera. Wiss. Arb. Burgenland 46: 1-165. Kovács, L. (1953) : Die Gross-Schmetterlinge Ungarns und ihre Verbreitung. - Folia ent. hung. 6: 75-164. Kovács, L. (1957): Die im Jahre 1956 neu festgestellten Gross-Schmetterlingen in Ungarn. - Folia ent. hung. 10: 125-132. REFERENCES