Results
A total of 4847 specimens of 105 chafer species belonging to Rutelinae, Melolonthinae, and Dynastinae were recorded (Table S2). Species richness estimators suggested >89% of total species inventory had been captured. While 82% of the individual locality assemblages showed more than 84% of sampling completeness (in terms of species composition), in two cases sampling completeness was, with less than 50%, quite low (L9, L14) (Table S3). Species accumulation curves for individual localities showed that about 80% of its species have been captured in less than half of the total trapping events (before 34th trapping event) (Figure S2). Similarly, species accumulation curves for individual traps showed that about 80% or slightly more of the expected species has been captured before half of the total trapping events.
Melolonthinae was the most speciose subfamily (n=79), with the highest number of recorded individuals (n=2504). Dynastinae had the lowest number of species (n=8) and individuals (n=38). For Rutelinae we recorded 18 species in 531 exemplars. Among the Melolonthinae, Sericini was the most speciose tribe accounting 44.7% of all species (Figure 1). Many species were geographically restricted, 67 species out of 105 (64% of total assemblage) were found exclusively at just one site. L3 showed the highest alpha diversity and L13 the lowest (Table S3). These patterns are also reflected by the results of the two-way cluster analysis, one for the species occurring in different localities, and another for the different localities in which certain species are present (Figure 2) which linked faunal similarity with similar species occurrence patterns.