Fig. 3

CCA ordination diagram of species distribution and environmental factors in Dianchi Lake. Black arrows represented the significant affected land-cover variables (p_MF = 0.025; p_DF = 0.006; p_LG = 0.031; p_WL = 0.007; p_SB = 0.058), while dotted arrows were the insignificant ones. Sample sits were represented by open circles, whereas species were meant by black diamonds. See abbreviation of land-cover variables in Table 1 and species code in Additional file 2: Table S2