Ábrahám Levente (szerk.): Válogatott tanulmányok VIII. - Natura Somogyiensis 23. (Kaposvár, 2013)
Horváth B.: Diversity comparison of nocturnal macrolepidoptera communities (Lepidoptera: Macroheterocera) in different forest stands
232 Natura Somogyiensis Results Throughout this study, a total of 349 Lepidoptera species and 8046 individuals were identified in 12 families. The highest number of species was detected in the mixed forest stand, followed by beech and oak forests. The number of individuals found in each forest Number of sample Fig. 2: Species accumulation curves (sample rarefaction) of nocturnal Lepidoptera species in the study sites did not correlate with the number of species. The highest number of registered specimens was in the beech forest stand, followed by mixed and oak forest stands (Table 1). The calculated diversity indices (Shannon and Simpson) do not show unambiguous results. The Shannon diversity index value was highest in the mixed forest, while the Simpson diversity index produced different results (Table 1). These data can be explained by the different sensitivity of the diversity formulas to dominant and rare species, and the equitability. The Shannon diversity formula calculates using the degree of evenness of species abundances, while the Simpson index is heavily weighted towards the most abundant species in the sample (Peet 1974). Table 1: Ecological structural characteristics of macromoth communities in the different forest stands Mixed forest stand Oak forest stand Beech forest stand No. of species 249 219 240 No. ofindividuals 2612 1975 3459 Shannon index 4.414 4.364 4.008 Simpson index 0.9722 0.9752 0.9604 Pielou's equitability index 0.8 0.8098 0.7314
