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Spatial sorting promotes the spread of maladaptive hybridization

August 1, 2015

Invasive hybridization is causing loss of biodiversity worldwide. The spread of such introgression can occur even when hybrids have reduced Darwinian fitness, which decreases the frequency of hybrids due to low survival or reproduction through time. This paradox can be partially explained by spatial sorting, where genotypes associated with dispersal increase in frequency at the edge of expansion, fueling further expansion and allowing invasive hybrids to increase in frequency through space rather than time. Furthermore, because all progeny of a hybrid will be hybrids (i.e., will possess genes from both parental taxa), nonnative admixture in invaded populations can increase even when most hybrid progeny do not survive. Broader understanding of spatial sorting is needed to protect native biodiversity.

Citation Information

Publication Year 2015
Title Spatial sorting promotes the spread of maladaptive hybridization
DOI 10.1016/j.tree.2015.05.008
Authors Winsor H. Lowe, Clint C. Muhlfeld, Fred W. Allendorf
Publication Type Article
Publication Subtype Journal Article
Series Title Trends in Ecology and Evolution
Index ID 70157413
Record Source USGS Publications Warehouse
USGS Organization Northern Rocky Mountain Science Center