Figure 3

Effect of food characteristics on the relative abundance and density of Hooded Cranes within the Shengjin and Caizi lakes wetlands. a and d show a positive and significant linear relationship of both the relative abundance and density with food abundance (r > 0.5, p < 0.05); b, c, e and f show that the negative but not significant linear relationship both of the relative abundance and density with the food depth and sediment penetrability (r < 0.5, p > 0.05).