Figure 5: Data distribution obtained by NMDS.
From: Ecological factors drive natural selection pressure of avian aryl hydrocarbon receptor 1 genotypes
Ecological factors were marked with an initial (H: habitat, F: food, M: migration, N: nesting type). Each colored circle represents the clusters that each species belongs to. An open square represents the coordinate of each ecological factor in the NMDS graph. The distribution of avian species along two axes after the NMDS analysis was consistent with the results from the of two-way cluster analysis. Marine and wetland ecosystem factors separated species of cluster 1 from others, and terrestrial species were divided into 4 clusters according to 4 categories of ecological factors.
