Fig. 4From: eDNA of zooplankton reveals the ecological community thresholds for key environmental factors in the Baiyangdian Lake aquatic ecosystemRDA analysis of sample–environment relationships a and species–environment relationships b between lakes and rivers. RDA analysis of sample–environment relationships c and species–environment relationships d between streams. P < 0.05 indicated that the variance was significantly indigenous, and each point represented a species. The larger the point was, the higher the corresponding species abundance was. The gray point represented the species with low abundanceBack to article page