Table 1.

Results obtained from the Mantel tests for all the distance matrices. Altitude refers to the altitude‐based least‐cost path

Distances compared	Basin	Correlation	p‐Value
Euclidean vs. Phylogenetic	All	.32	.0002
Altitude vs. Phylogenetic	All	.48	.0002
River vs. Phylogenetic	All	−.06	.0533
Euclidean vs. Phylogenetic	Duero	.11	.0568
Altitude vs. Phylogenetic	Duero	.16	.0290
River vs. Phylogenetic	Duero	.02	.2578
Euclidean vs. Phylogenetic	Miño	.40	.0002
Altitude vs. Phylogenetic	Miño	.41	.0002
River vs. Phylogenetic	Miño	.38	.0002