A restricted hybrid zone between native and introduced red fox (Vulpes vulpes) populations suggests reproductive barriers and competitive exclusion

  title={A restricted hybrid zone between native and introduced red fox (Vulpes vulpes) populations suggests reproductive barriers and competitive exclusion},
  author={Benjamin N. Sacks and Marcelle Moore and Mark J. Statham and Heiko U. Wittmer},
  journal={Molecular Ecology},
Introduced species can threaten native taxa in multiple ways, including competition and hybridization, which can reduce fitness, alter ecological niches or swamp native genomes. Encroachment and hybridization by introduced species also provide opportunities to study the dynamics of invasiveness and hybridization during early stages following contact. We used 33 microsatellites, 51 single nucleotide polymorphisms and a mtDNA marker to characterize the extent and spatial pattern of encroachment… 
Rapid genetic assimilation of native wall lizard populations (Podarcis muralis) through extensive hybridization with introduced lineages
The extent of introgression and the dominance of alien haplotypes in mixed populations indicate that introductions of non‐native lineages represent a serious threat to the genetic integrity of native populations due to the rapid creation of hybrid swarms.
The origin of recently established red fox populations in the United States: translocations or natural range expansions?
Abstract Red foxes (Vulpes vulpes) are native to boreal and western montane portions of North America but their origins are unknown in many lowland areas of the United States. Red foxes were
Landscape genetics of the nonnative red fox of California
The study illustrates the utility of a landscape‐genetic approach for understanding invasion dynamics and metapopulation structure of one of the world's most destructive invasive mammals, the red fox.
Genetic and spatial characterization of the red fox (Vulpes vulpes) population in the area stretching between the Eastern and Dinaric Alps and its relationship with rabies and canine distemper dynamics
This study genetically and spatially characterised the red fox population in the area stretching between the Eastern and Dinaric Alps, which has been affected by both distemper and rabies at different time intervals, and confirmed a weak genetic differentiation within the fox population using Bayesian clustering analyses.
Nuclear Genetic Analysis of the Red Fox Across its Trans-Pacific Range
It is hypothesized that North American red foxes either hybridized with Eurasian foxes in Beringia at the start of the last glaciation or merged with a Beringian population after the last Glaciation, and future work is needed to test between these scenarios and assess speciation.
Distribution of native and nonnative ancestry in red foxes along an elevational gradient in central Colorado
The red foxes (Vulpes vulpes) indigenous to the mountains of the western United States are high-elevation specialists that could face range reduction due to climatic warming, as well as potential
Genetic and morphometric evidence on a Galápagos Island exposes founder effects and diversification in the first‐known (truly) feral western dog population
DNA and morphometric data from 92 dogs tested the hypotheses that these dogs persisted independently of humans for up to a century and a half since descending from a handful of dogs introduced in the early 1800s, and genetic diversity patterns among the three island subpopulations were consistent with stepping‐stone founder effects.
Differentiation of North African foxes and population genetic dynamics in the desert—insights into the evolutionary history of two sister taxa, Vulpes rueppellii and Vulpes vulpes
Intriguing insights are unveiled on the genetic structure of carnivore species in North Africa, suggesting that further integrative research is needed.
Genetic Characteristics of Red Foxes In Northeastern Oregon
Findings show that both native and nonnative sources contributed to the Red Fox populations currently occupying this region, and Red Foxes in montane habitats of their former range in northeastern Oregon reflect predominantly native ancestry, whereas those in more lowland habitats outside the boundaries of theirFormer range represent a mix of native andnonnative ancestry.


Variable extent of hybridization between invasive sika (Cervus nippon) and native red deer (C. elaphus) in a small geographical area
It is argued that the pattern of differential introgression across the study area is primarily due to the rarity of hybridization events between the two species and the limited time the twospecies have been in contact, contrasts with the causes of classic mosaic hybrid zones.
Hybridization among Three Native North American Canis Species in a Region of Natural Sympatry
The results demonstrate that the factors driving introgressive hybridization in sympatric Texan Canis are multiple and complex, and density-dependent effects do not fully explain the observed pattern either.
Introduction history and habitat variation explain the landscape genetics of hybrid tiger salamanders.
  • B. Fitzpatrick, H. Shaffer
  • Biology, Environmental Science
    Ecological applications : a publication of the Ecological Society of America
  • 2007
The extent of introgression between native California tiger salamanders and introduced barred tigerSalamanders relative to habitat, distance from introduction sites, and watershed boundaries is described and management favoring natural habitat characteristics may substantially decrease the rate of spread of introduced 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.
Detecting hybridization between wild species and their domesticated relatives
Results indicate that introgressive hybridization can be locally pervasive, and that conservation plans should be implemented to preserve the integrity of the gene pools of wild populations, as well as evaluating risks of outbreeding depression.
Hybridization between escaped domestic and wild American mink (Neovison vison)
The overwhelming presence of domestic animals and their hybridization with mink in natural populations is of great concern for the future sustainability of wild mink populations.
The sequence divergence between kit and swift foxes is similar to that between these taxa and the arctic fox, a morphologically distinct species commonly placed in a separate genus, and this result presents a dilemma for species concepts, and it is concluded that kit and Swift foxes should be recognized as separate species.
Historical and ecological determinants of genetic structure in arctic canids
Results presented here suggest that, through its influence on sea ice, vegetation, prey dynamics and distribution, continued arctic climate change may have effects as dramatic as those of the Pleistocene on the genetic structure of arctic canid species.
North American montane red foxes: expansion, fragmentation, and the origin of the Sacramento Valley red fox
Findings along with previously reported body size distinctions between Sacramento Valley and montane red foxes argue for distinct subspecific status for the Sacramento Valley red fox, for which the designation V. v. patwin n.
Data indicate that probable hybridiza- tion is limited in extent with no evidence of introgressive hybridization in the zone of overlap in western Texas and two possible isolating mechanisms are considered: time of denning and ecological preference.