Historical vs. ecological factors influencing global patterns of scarabaeine dung beetle diversity

摘要: There has been much debate concern- ing the relative influence on biodiversity of his- torical vs. current ecological factors. Although both are important, we suggest that historical influ- ences might be greater at higher taxonomic level, since one is looking further back into evolutionary history than lower level. unable to separate from effects in present global study scarabaeine dung beetles, able demonstrate differ- correlations between major environmental influences (climatic area, numbers types) and components diversity (taxon richness, taxon diversity, functional composition) different levels (tribe, genus, species). Current variation richness correlated strongly biogeographical area suitable climate all three levels. However, generic species most climatic combinations which include tropical warm summer rainfall types (I, II). In contrast, tribal temperate (II, VI, X). Regional vari- ation number available shows a strong positive correlation regional level but not Similarly, biogeo- graphical differences show negative dominance indices for (distribution tribes) none (species per genus). As diversification linked closely propor- tions ball-rolling genera also each region. conclusion, presence type correla- only may reflect diversifica- tion, whereas with effects.