Beta diversity or latitudinal variation of Chilean millipede species composition. The curves in the kernel density plot show the distribution of observed values for beta diversity (βSOR, solid curve) and its two additive components, spatial turnover (βSIM, segmented curve) and nestedness (βSNE, dotted curve). According to this analysis, millipede beta diversity is mainly modulated by species turnover between latitudinal bands. Therefore, species composition changes latitudinally following the north-south climatic gradient that characterizes Chile.