From: Ecological character displacement in the face of gene flow: Evidence from two species of nightingales
latitude
longitude
species
region
species × region
F
p
PC1
128.57
<0.001
6.64
0.011
55.44
0.14
0.713
0.30
0.585
PC3
0.83
0.364
9.10
0.003
12.52
6.55
5.53
0.020