Hybridization and endangered species protection in the molecular era

  title={Hybridization and endangered species protection in the molecular era},
  author={Robert K. Wayne and H. Bradley Shaffer},
  journal={Molecular Ecology},
After decades of discussion, there is little consensus on the extent to which hybrids between endangered and nonendangered species should be protected by US law. [] Key Result We developed a decision-tree framework for evaluating hybrid protection, including both the processes that produced hybrids (human-mediated or natural) and the ecological impact of hybrids on natural ecosystems.
Harmonizing hybridization dissonance in conservation
A novel view of conservation guidelines is proposed, in which human-induced hybridization may also be a tool to enhance the likelihood of adaptation to changing environmental conditions or to increase the genetic diversity of taxa affected by inbreeding depression.
Hybridization as a conservation management tool
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
Genetic Rescue and the Plight of Ponui Hybrids
New understanding from genome science challenges the sufficiency of population genetic models to inform decision making and suggests instead that the contrasting outcomes of hybridization, “outbreeding depression” and “heterosis,” require understanding additional factors that modulate gene and protein expression and how these factors are influenced by the environment.
Is the Red Wolf a Listable Unit Under the US Endangered Species Act?
A case study of the red wolf from the southeastern United States concludes that under any proposed evolutionary scenario red wolves meet both criteria to be considered a DPS: they are Discrete compared with other conspecific populations, and they are Significant to the taxon to which they belong.
Hybridization as a facilitator of species range expansion
The hypothesis that hybridization between species can contribute to species range expansion is described and evaluated and how such a process can occur and the empirical data that are needed to test this hypothesis are discussed.
Perspective Is the Red Wolf a Listable Unit Under the US Endangered Species Act ?
Defining units that can be afforded legal protection is a crucial, albeit challenging, step in conservation planning. As we illustrate with a case study of the red wolf (Canis rufus) from the
Redefining the Role of Admixture and Genomics in Species Conservation
A conceptual framework under which Hybridization, even extensive hybridization, no longer disqualifies a species from protection is promoted; instead, customized case‐by‐case management is encouraged to protect evolutionary potential and maintain processes that sustain ecosystems.
A multi-disciplinary evaluation of the hybrid anemonefish Amphiprion leucokranos: behaviour shaping evolutionary outcomes of hybridization
How ecology and behaviour contribute to maintenance and persistence of the Amphiprion leucokranos hybrid zone is addressed, revealing that the relative frequency and size disparities of parent species drive regional ecological patterns and gene flow among taxa, where species integrity is maintained despite extensive mixed species group cohabitation and back-crossing.
Conservation of biodiversity in the genomics era
How genome-scale data can inform species delineation in the face of admixture, facilitate evolution through the identification of adaptive alleles, and enhance evolutionary rescue based on genomic patterns of inbreeding are discussed.


Ecological equivalency as a tool for endangered species management.
It is found that pure CTS and superinvasive larvae were ecologically equivalent, because their positions in the multivariate community space were statistically indistinguishable and they did not differ significantly along any univariate community axes.
Perspectives on the conservation of wild hybrids
Rapid spread of invasive genes into a threatened native species
Using computer simulations, it is found that the spread of a few introduced genes 90 km into a threatened native species in 60 years is unlikely to emerge by chance among selectively neutral markers, and implies that natural selection has favored both the movement and fixation of these exceptional invasive alleles.
Invasive hybrid tiger salamander genotypes impact native amphibians
The results suggest that both genetic and ecological factors are likely to influence the dynamics of admixture, and that tiger salamander hybridization might constitute a threat to additional pond-breeding species of concern in the region.
Characteristics for evaluating the conservation value of species hybrids
This work analyzed 62 hybrids of potential conservation concern in Canada and the United States to identify cases where opportunities for hybrid conservation are being overlooked in policy and suggest opportunities for hybrids conservation based on relevant hybrid characteristics.
Hybridization and the species problem in conservation
A brief perspective on hybridiza- tion and the species problem in conservation is offered and it is emphasized that the goals and premises of legislative classification are not identical to those of scientific classification.
Dynamics of Hybridization and Introgression in Red Wolves and Coyotes
  • R. Fredrickson, P. Hedrick
  • Environmental Science
    Conservation biology : the journal of the Society for Conservation Biology
  • 2006
The results suggest sterilization can be an effective short-term strategy to reduce the likelihood of extirpation in colonizing populations of red wolves and whether red wolf numbers are increased by sterilization depends on the level of sterilization effort and the acting reproductive barriers.
Genetics and wolf conservation in the American West: lessons and challenges
Wolf conservation in the American West is discussed in relation to critical genetic factors that affect restoration, recovery and conservation, and a synthesis of problems and solutions in the large-scale recovery of wolves is discussed.
Mitochondrial DNA analysis implying extensive hybridization of the endangered red wolf Canis rufus
Phylogenetic analysis indicates that red wolves have either a grey wolf or coyote mtDNA genotype, demonstrating hybridization among these species, and does not argue against the continued protection of the red wolf.