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
Horváth, B: Diversity comparison of nocturnal macrolepidoptera 233 A measure of equitability showed a trend similar to that of the Simpson diversity values. The value of Pielou’s index was lower in the beech forest stand than in the two other sites (Table 1). There were some differences in the proportions of dominant and rare species between the sampling sites. Most species were rare, as indicated by the step initial gradients in the rank abundance plots (Fig. 3a-c). The proportion of abundant and rare species was the most balanced in the oak forest, followed by the mixed and beech forests. Comparing the Shannon diversity values revealed significant differences between mixed and beech forest stands as well as between oak and beech forest stands (p=0.01). There was no significant difference between mixed and oak forest stands (Table 2). Table 2: Comparison of Shannon diversity values using Hutchenson’s t-test (‘significant difference - p=0,01) Mixed Beech Beech 10.2750* Oak____________13452 8.5763* Rényi’s diversity ordering found a significant difference between mixed and beech forests, but ranking of mixed and oak forests as well as oak and beech forests was not possible (Fig. 4). Species rank Species rank Fig. 3: Rank-abundance plots showing the number of captures of each species of macro moth in mixed (a), oak (b) and beech (c) forest stands