Hybridization as a facilitator of species range expansion.
Explaining the evolution of species geographical ranges is fundamental to understanding how biodiversity is distributed and maintained. The solution to this classic problem in ecology and evolution remains elusive: we still do not fully know how species geographical ranges evolve and what factors fuel range expansions. Resolving this problem is now more crucial than ever with increasing biodiversity loss, global change and movement of species by humans. Here, we describe and evaluate the hypothesis that hybridization between species can contribute to species range expansion. We discuss how such a process can occur and the empirical data that are needed to test this hypothesis. We also examine how species can expand into new environments via hybridization with a resident species, and yet remain distinct species. Generally, hybridization may play an underappreciated role in influencing the evolution of species ranges. Whether-and to what extent-hybridization has such an effect requires further study across more diverse taxa.
Department of Biology, University of North Carolina, Chapel Hill, NC 27599-3280, USA kpfennig@unc.edu.
Karin S
0000-0002-0852-287X
KS
Pfennig
Department of Biology, University of North Carolina, Chapel Hill, NC 27599-3280, USA.
Audrey L
0000-0003-1783-7678
AL
Kelly
Department of Biology, University of North Carolina, Chapel Hill, NC 27599-3280, USA.
Amanda A
0000-0001-9507-0009
AA
Pierce
D063147:Animal Distribution; D000818:Animals; D005075:Biological Evolution; D006824:Hybridization, Genetic; D063148:Plant Dispersal
adaptation; admixture; hybridization; introgression; invasive species; range expansion
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