Density-dependent cladogenesis in birds.

The correlation of clade size with γ was highly significant, r = −0.58, p < 0.001 ( Figure 2 A).

also in 132,142 other papers

When variation in clade size was accounted for using multiple regression, there was a marginally nonsignificant positive correlation between clade age and γ ( Table 2 ).

also in 448 other papers