The gut microbiome reflects ancestry despite dietary shifts across a hybrid zone

Danny Nielsen, Joshua Harrison, Nathan Byer, Trevor Faske, Thomas Parchman, W. Brian Simison & Marjorie Matocq
The microbiome is critical to an organism’s phenotype, and its composition is shaped by, and a driver of, eco-evolutionary interactions. We investigated how host ancestry, habitat, and diet shape gut microbial composition in a mammalian hybrid zone that occurs across an ecotone between distinct vegetation communities. We found that habitat is the primary determinant of diet, while host genotype is the primary determinant of the gut microbiome—a finding further supported by intermediate microbiome composition in...
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