Fig. 3.

Principal component analysis (PCA) ordination diagram (two first axes) of studied plant species and associated arbuscular mycorrhizal fungi (AMF), dark septate endophytes (DSE) and Olpidium spp. colonization parameters. Mycorrhizal frequency (F_AMF), relative mycorrhizal root length (M), the frequency of occurrence of AMF vesicles (F_VES), the frequency of occurrence of dark septate endophytes (F_DSE), the frequency of Olpidium occurrence (F_OLP). AMF species richness (AMFsp.rich). The size of the circles indicates the invasion status of plant species (small – weed, medium – not harmful, large – transformer). Particular colors of the circles correspond to different plant life forms. The abbreviation of species names are explained in Table 1