Extended Data Fig. 2: Results from the gradient forest analysis of 500,000 loci and 11 contemporary populations across the breeding range of the southwestern willow flycatcher.
From: Historical DNA reveals climate adaptation in an endangered songbird
(A) PCA of the top three climate variables associated with genomic variation. The arrows indicate the loadings of the top-ranking environmental variables. Colours are based on the predicted genomic composition from the top climate variables at 100,000 random points. (B) Gradient forest-transformed environmental variables from the PCA mapped across the breeding range of the southwestern willow flycatcher. Sampling locations are indicated with black circles.
