ArticleProceedings of the National Academy of Sciences of the United States of America2007
Hybrid vigor between native and introduced salamanders raises new challenges for conservation.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.
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Who cites it
36 citing papers in PubMed, 155 citations in OpenAlex.
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- Building genomically-informed demographic models to guide management of invasive hybrids.Ecological applications : a publication of the Ecological Society of America · 2025Article
- Genomic and Morphological Evidence Support Contemporary Three-Way Interspecific Hybridization in Ranid Frogs.Ecology and evolution · 2025Article
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- A novel genetic strategy to enable rapid detection of rare non-native alleles.Scientific reports · 2024Article
- Hybrids of two destructive subterranean termites established in the field, revealing a potential for gene flow between species.Heredity · 2024Article
- Hybridization and adaptive introgression in a marine invasive species in native habitats.iScience · 2023Article
- Identification of hybrids between the Japanese giant salamander (Ecology and evolution · 2023Article
- Age- and dose-dependent susceptibility of axolotls (Ambystoma mexicanum) by bath exposure to Ambystoma tigrinum virus (ATV).Virology · 2023Article
- Ecological outcomes of hybridization vary extensively in Catostomus fishes.Evolution; international journal of organic evolution · 2022Article
- Southern introgression increases adaptive immune gene variability in northern range margin populations of Fire-bellied toad.Ecology and evolution · 2021Article
- ×Sorbaronia mitschurinii: from an artificially created species to an invasion in Europe: repeating the fate of invasive Amelanchier ×spicata, a review.Journal of plant research · 2021Review
- Recombining Your Way Out of Trouble: The Genetic Architecture of Hybrid Fitness under Environmental Stress.Molecular biology and evolution · 2020Article
- Variable hybridization outcomes in trout are predicted by historical fish stocking and environmental context.Molecular ecology · 2019Article
- High Genetic Diversity With Weak Phylogeographic Structure of the InvasiveFrontiers in plant science · 2019Article
- Demographic consequences of reproductive interference in multi-species communities.BMC ecology · 2018Article
- Interspecies introgressive hybridization in spiny frogsEcology and evolution · 2018Article
- Inconsistent reproductive isolation revealed by interactions betweenEvolution letters · 2017Article
- Hybridization and polyploidy enable genomic plasticity without sex in the most devastating plant-parasitic nematodes.PLoS genetics · 2017Article
- Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Ecology and evolution · 2017Article
Corrections and comments
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hybridization between differentiated lineages can have many different consequences depending on fitness variation among hybrid offspring. When introduced organisms hybridize with natives, the ensuing evolutionary dynamics may substantially complicate conservation decisions. Understanding the fitness consequences of hybridization is an important first step in predicting its evolutionary outcome and conservation impact. Here, we measured natural selection caused by differential viability of hybrid larvae in wild populations where native California Tiger Salamanders (Ambystoma californiense) and introduced Barred Tiger Salamanders (Ambystoma tigrinum mavortium) have been hybridizing for 50-60 years. We found strong evidence of hybrid vigor; mixed-ancestry genotypes had higher survival rates than genotypes containing mostly native or mostly introduced alleles. Hybrid vigor may be caused by heterozygote advantage (overdominance) or recombinant hybrid vigor (due to epistasis or complementation). These genetic mechanisms are not mutually exclusive, and we find statistical support for both overdominant and recombinant contributions to hybrid vigor in larval tiger salamanders. Because recombinant homozygous genotypes can breed true, a single highly fit genotype with a mosaic of native and introduced alleles may eventually replace the historically pure California Tiger Salamander (listed as Threatened under the U.S. Endangered Species Act). The management implications of this outcome are complex: Genetically pure populations may not persist into the future, but average fitness and population viability of admixed California Tiger Salamanders may be enhanced. The ecological consequences for other native species are unknown.
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