Fig. 2a-c: Ant species richness per habitat. For each of the four sampled habitat types (OG = old grassland; NG = new grassland; CN = cereal field near NG; CF = cereal field far from NG) the (a) ant species identity, the (b) ant species richness and the (c) turnover (βSIM) and nestedness (βSNE) components, and their relative contribution to the observed Sørensen dissimilarity (βSOR) is shown. Different letters in (b) indicate significant differences (p < 0.05) between habitats and were calculated using a Monte-Carlo randomization test (Manly 1997).