Hybridization as a conservation management tool

• Main Authors: Wing Yan Chan, Ary A. Hoffmann, Madeleine J. H. vanOppen
• Format: Article
• Language: English
• Published: Wiley 2019-09-01
• Series: Conservation Letters
• Subjects: adaptive potential; conservation policy; genetic rescue; hybridization; inbreeding depression
• Online Access: https://doi.org/10.1111/conl.12652

Abstract The recent extensive loss of biodiversity raises the question of whether organisms will adapt in time to survive the current era of rapid environmental change, and whether today's conservation practices and policies are appropriate. We review the benefits and risks of inter‐ and intraspecific hybridization as a conservation management tool aimed at enhancing adaptive potential and survival, with particular reference to coral reefs. We conclude that hybridization is underutilized and that many of its perceived risks are possibly overstated; the few applications of hybridization in conservation to date have already shown positive outcomes. Moreover, perceptions of potential risk change significantly when the focus of conservation is on preserving the adaptive potential of a species/population, instead of preserving the species in its original state. Further, we suggest that the uncertain legal status of hybrids as entities of protection can be costly to society and ecosystems, and that a legislative revision of hybrids and hybridization is overdue. We present a decision tree to help assess when and where hybridization can be a suitable conservation tool, and whether inter‐ or intraspecific hybridization is the preferred option.