Ecological displacement in a Rocky Mountain hybrid zone informs management of North American martens (Martes)

Parapatric sister species are ideal for tests of ecological interactions. Pacific (Martes caurina) and American pine (M. americana) martens are economically and culturally valuable furbearers that hybridize in the north-central Rocky Mountains. Despite preliminary evidence of biased introgression, the hybrid zone has been geographically stable for 70 years, but interspecific ecological interactions have yet to be examined in detail.