Az Alpokalja természeti képe közlemények 4. (Praenorica - Folia historico-naturalia. Szombathely, 2001)

Czigány Boglárka–Ábrahám Levente: Nappali lepkék diverzitásának vizsgálata három jellegzetes göcseji élőhelyen (Lepidoptera: Rophalocera)

CZIGÁNY В. — ÁBRAHÁM L. : Nappali lepkék diveratásának vizsgálata három göcseji élőhelyen there was no high abundant species in the semi dry meadow but there were lots of almost equal abundant species. Pieris napi (27%) was the most abundant species in the both areas, the wet meadow and the agricultural field. Besides the subdominant species were Pieris rapae (18%) and Coenonympha pamphilus (14%). In the agricultural field the subdominant species were Coenonympha pamphilus (19%), Maniola jurtina (15%) and Pieris rapae (13%). By studying the dominance diversity curves of the different assemblages it is shown that the curve of the assemblage in the semi dry meadow fits theoretical lognormal curve best. SHANNON-WIENER formula was chosen to describe the diversity changes in time. The only broken part in the curve of the assemblage in the semi dry meadow could be found in 24 April 1999, and a similar curve of the assemblage in wet meadow was also found. Besides, the diversity in the wet meadow was low enough on 12 June 1999 as well, when Alsó-Válicka brook flooded the sampling transect line. However, this assemblage seemed to regenerate quickly as shown by the value of the diversity curve in 20 June 1999. Certainly, diversity changes in the agricultural field was measured at that time, the lowest diversity values were in 10 April 1999, 8 May 1999 and 22 May 1999. This butterfly assemblage reorganized slowly in June then its diversity decreased at the end of August again, in the end its diversity was increasing until the end of vegetation period. The lowest value of evenness among the studied butterfly assemblages could be found in the agricultural field. Due to the sensitivities of the different diversity indexes the sampling materials were also compared by RÉNYi-formula, which show the diversity profile in the values of different scale parameters. The assemblage in the semi dry meadow among the three different habitats shows the highest diversity, while the lowest values belong to the butterfly assemblage in the agricultural field. Comparing the diversities by t-test (p = 0,05) at 2 0-scale parameter, the value of the quadratic diversity it is shown that no significant differences between the assemblages of the wet meadow and agricultural field were found In conclusion, the rich flora in semi dry meadow shows a correlation with the diversity of assemblage of butterfly. The characteristic butterfly assemblage in the wet meadow shows lower diversity and species richness than the assemblage in the semi dry meadow and this habitat was disturbed by human activities for ages, so this assemblage with several protected species Can adapt to the disturbances If the continuous disturbance, the mowing stopped, thé assemblage in the wet meadow would change in species richness and diversity as well. The assemblage in the agricultural field has the lowest species richness and diversity. The reason of this was probably the monoculture and continuous disturbance (spraying, harvesting etc.). In the agricultural field only a guild, not a wellorganised assemblage could form. 108