Fig. 4: Ordination plot showing the trait space covered by ant species occurring in three of the four habitat types (OG = old grassland; NG = new grassland; CN = cereal field near NG; differently coloured and shaped symbols and dashed lines respectively). CF samples (cereal field far from NG) are not shown due to low cumulative species richness. A principal component analysis (PCA) was conducted based on a species trait matrix. Each symbol indicates the position of one species occurring in the respective habitat. Names are only displayed for the most outer species (names for other species are hidden to reduce overlap). Arrows indicate the correlation of the respective traits with the species position in reduced ordination space. Used traits are as follows: vertical strata species is most likely to be found foraging (Strata_forage), percentage of animal diet among total food intake (Zoopha), percentage of trophobiosis-based diet of total food intake (Tropho), worker body length in mm (WS), colony size log transformed (CS), behavioural dominance (Dom), number of queens per nest (nQ), number of nests per colony (nN), colony foundation type (CFT), recruitment behaviour of workers (FS), percentage of microhabitats in soil and/or under stones contributing to total nest space (NMS), percentage of microhabitats in upper root felt contributing to total nest space (NMT), percentage of microhabitats in wood and bark contributing to total nest space (NMW), colony foundation through social parasitism (SP). Values on PCA axes refer to the percentage of explained variance (eigenvalues).