Invasive hybridization in a threatened species is accelerated by climate change

Muhlfeld, Clint C.; Kovach, Ryan P.; Jones, Leslie; Al‐Chokhachy, Robert; Boyer, Matthew; Leary, Robb F.; Lowe, Winsor H.; Luikart, Gordon; Allendorf, Fred W.

doi:10.1038/nclimate2252

Cited by 242 publications

(241 citation statements)

References 30 publications

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“…In both historical and contemporary samples, the overall proportion of RBT admixture in Abbot Creek was more than 90%, and included individuals ranging from highly backcrossed hybrids to pure RBT. In the early 1980s, hybridization was rare or absent in WCT populations located upstream from Abbot Creek, but RBT invasion and subsequent RBT Â WCT hybridization spread rapidly upstream during the subsequent decades (see [29] for a description). (table 1).…”

Section: Materials and Methods (A) Study Populationsmentioning

confidence: 99%

Dispersal and selection mediate hybridization between a native and invasive species

et al. 2015

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Hybridization between native and non-native species has serious biological consequences, but our understanding of how dispersal and selection interact to influence invasive hybridization is limited. Here, we document the spread of genetic introgression between a native (Oncorhynchus clarkii) and invasive (Oncorhynchus mykiss) trout, and identify the mechanisms influencing genetic admixture. In two populations inhabiting contrasting environments, non-native admixture increased rapidly from 1984 to 2007 and was driven by surprisingly consistent processes. Individual admixture was related to two phenotypic traits associated with fitness: size at spawning and age of juvenile emigration. Fish with higher non-native admixture were larger and tended to emigrate at a younger age-relationships that are expected to confer fitness advantages to hybrid individuals. However, strong selection against non-native admixture was evident across streams and cohorts (mean selection coefficient against genotypes with non-native alleles (s) ¼ 0.60; s.e. ¼ 0.10). Nevertheless, hybridization was promoted in both streams by the continuous immigration of individuals with high levels of non-native admixture from other hybrid source populations. Thus, antagonistic relationships between dispersal and selection are mediating invasive hybridization between these fish, emphasizing that data on dispersal and natural selection are needed to fully understand the dynamics of introgression between native and non-native species.

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Section: Materials and Methods (A) Study Populationsmentioning

confidence: 99%

Dispersal and selection mediate hybridization between a native and invasive species

et al. 2015

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“…Specifically, hybridization can lead to replacement of the resident species by the invading species or the breakdown of species boundaries [44,45]; both outcomes result in biodiversity loss. These issues are especially pressing, as climate change is associated with changes in community composition and spatial shifts in geographical distribution [46 -48], and hybridization events will likely become more common [49,50]. Thus, studies are needed to evaluate the role of hybridization in the evolution of species ranges across diverse taxa.…”

Section: Introductionmentioning

confidence: 99%

Hybridization as a facilitator of species range expansion

Pfennig¹,

Kelly²,

Pierce³

2016

Proc. R. Soc. B.

150

152

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Explaining the evolution of species geographical ranges is fundamental to understanding how biodiversity is distributed and maintained. The solution to this classic problem in ecology and evolution remains elusive: we still do not fully know how species geographical ranges evolve and what factors fuel range expansions. Resolving this problem is now more crucial than ever with increasing biodiversity loss, global change and movement of species by humans. Here, we describe and evaluate the hypothesis that hybridization between species can contribute to species range expansion. We discuss how such a process can occur and the empirical data that are needed to test this hypothesis. We also examine how species can expand into new environments via hybridization with a resident species, and yet remain distinct species. Generally, hybridization may play an underappreciated role in influencing the evolution of species ranges. Whether-and to what extent-hybridization has such an effect requires further study across more diverse taxa.

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“…First, evidence is growing that climate change is increasing rates of hybridization, as species that were previously geographically isolated come into contact with each other (Garroway et al 2010;Muhlfeld et al 2014). Second, evidence from genomic studies is revealing that genes associated with climate change adaptation can be of hybrid origin (Becker et al 2013;De La Torre et al 2014).…”

Section: Colonization and Establishment: Hybridization And Polyploidymentioning

confidence: 99%

Biological Invasions, Climate Change, and Genomics

Chown¹,

Hodgins²,

Griffin³

et al. 2016

Crop Breeding

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The rate of biological invasions is expected to increase as the effects of climate change on biological communities become widespread. Climate change enhances habitat disturbance which facilitates the establishment of invasive species, which in turn provides opportunities for hybridization and introgression. These effects influence local biodiversity that can be tracked through genetic and genomic approaches. Metabarcoding and metagenomic approaches provide a way of monitoring some types of communities under climate change for the appearance of invasives. Introgression and hybridization can be followed by the analysis of entire genomes so that rapidly changing areas of the genome are identified and instances of genetic pollution monitored. Genomic markers enable accurate tracking of invasive species' geographic origin well beyond what was previously possible. New genomic tools are promoting fresh insights into classic questions about invading organisms under climate change, such as the role of genetic variation, local adaptation and climate pre-adaptation in successful invasions. These tools are providing managers with often more effective means to identify potential threats, improve surveillance and assess impacts on communities. We provide a framework for the application of genomic techniques within a management context and also indicate some important limitations in what can be achieved.

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Invasive hybridization in a threatened species is accelerated by climate change

Cited by 242 publications

References 30 publications

Dispersal and selection mediate hybridization between a native and invasive species

Dispersal and selection mediate hybridization between a native and invasive species

Hybridization as a facilitator of species range expansion

Biological Invasions, Climate Change, and Genomics

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