Ordination biplot of redundancy analysis (RDA) for zooplankton communities (species) and hydrochemical data (environmental variables). Vectors pointing in the same direction indicate a positive correlation, vectors crossing at right angles indicate a near zero correlation, while vectors pointing in opposite direction show a high negative correlation. Abbreviations used in the figures: Asc_ova, Ascomorpha ovalis; Asp_pri, Asplanchna priodonta; Bos_lon, Bosmina longirosrtis; Bra_ang, Brachionus angularis; Bra_cal, Brachionus calyciflorus; cop, copepodite of cyclopoids; Dap_cuc, Daphnia cucullata; Fil_lon, Filinia longiseta; Hex_mir, Hexarthra mira; Ker_coc, Keratella cochlearis; Ker_tec, Keratella tecta; Ker_qua, Keratella quadrata; Ker_val, Keratella valga; nau, nauplii of cyclopoids; Not_acu, Notholca acuminata; Not_sqa, Notholca squamula; Pol_lon, Polyarthra longiremis; Pol_vul, Polyarthra vulgaris; Pom_sul, Pompholyx sulcata; Syn_spp., Synchaeta spp.; Tes_pat, Testudinella patina; The_cra, Thermocyclops crassus, Tri_sim, Trichocerca similis.