Spatial sorting promotes the spread of maladaptive hybridization

Lowe, Winsor H.; Muhlfeld, Clint C.; Allendorf, Fred W.

doi:10.1016/j.tree.2015.05.008

Cited by 47 publications

(44 citation statements)

References 65 publications

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“…Behaviours affecting dispersal determine the rates of spread and range of invasive species (Perkins, Phillips, Baskett, & Hastings, ), but the dispersal behaviour of hybrids compared to parental species can vary (Taylor & Mahon, ) and potentially lead to high within‐population behavioural plasticity. If hybrid individuals disperse at high rates, their dispersal could overcome selective forces against hybridisation, resulting in the continued presence of hybrids in a population (Kovach et al, ; Lowe et al, ). Hybrid bigheaded carps provide an important example of how hybrid dispersal and behaviour may differ from parental species and how hybrids may affect the spread of invasive species into new habitats.…”

Section: Discussionmentioning

confidence: 99%

Early generation hybrids may drive range expansion of two invasive fishes

Coulter

Brey

Lamer³

et al. 2019

Freshwater Biology

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Introgressive hybridisation between two invasive species has the potential to contribute to their invasion success and provide genetic resiliency to rapidly adapt to new environments. Additionally, differences in the behaviour of hybrids may lead to deleterious ecosystem effects that compound any negative impacts of the invading parental species. Invasive silver carp (Hypophthalmichthys molitrix) and bighead carp (Hypophthalmichthys nobilis) provide an opportunity to evaluate how hybridisation may influence the behaviour, dispersal, and spread of an invasive species introgressive complex. In order to investigate the role hybrids may have in the invasion ecology of bigheaded carps, we examined the distribution, movements, and environmental cues for movement of two invasive fishes and their hybrids in the Illinois River (U.S.A.). Early generation hybrids (e.g. F1,F2, and first‐generation backcross individuals) composed a greater proportion of the population at the invasion front where abundances of bigheaded carp were low. A greater proportion of early hybrids passed through dams upstream towards the invasion front than did other hybrids and parental species. The movements and environmental cues for movement of late‐generation backcrosses (more genetically similar to parental genotype) were not different from the parental species with which they shared the most alleles. Although the direction of the relationship between movement and environment was sometimes different for the parental species and associated advanced generation hybrids, these results indicate that management for parental species will also affect most hybrids. Although early generation hybrids are rare, our results indicate they may disperse towards low‐density population zones (i.e. invasion fronts) or are produced at greater frequency in low‐density areas. These rare hybrids have the potential to produce a variety of unique genetic combinations that could result in more rapid adaptation of a non‐native population to their invaded range potentially facilitating the establishment of invasive species.

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Section: Discussionmentioning

confidence: 99%

Early generation hybrids may drive range expansion of two invasive fishes

Coulter

Brey

Lamer³

et al. 2019

Freshwater Biology

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“…In situ IH is more likely to occur in modified environments ( e.g. introduced species in novel environments), especially if the introduced species' populations are small (Hubbs, ; Wilson & Bernatchez, ), as admixed offspring may still contribute to the species' persistence in the novel range (Lowe et al ., ). Thus, hybridization will assist in maintaining or increasing the genetic base of introduced populations, hence counteracting population extinction (Mallet, ; Pfennig et al ., ; Wilson & Bernatchez, ).…”

Section: Micropterus Dolomieu (Smb) and Micropterus Salmoides (Lmb) Imentioning

confidence: 99%

“…genetic rescue) or for new mutations to arise (Pfennig et al ., ). Such scenarios support the idea that IH may be correlated with the successful establishment and spread of alien invasive species (Lowe et al ., ; Pfennig et al ., ).…”

Section: Micropterus Dolomieu (Smb) and Micropterus Salmoides (Lmb) Imentioning

confidence: 99%

Sleeping with the enemy: introgressive hybridization in two invasive centrarchids

Diedericks

Henriques

Heyden

et al. 2018

Journal of Fish Biology

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Introgressive hybridization between Micropterus dolomieu and Micropterus salmoides was assessed in their invaded South African range using nine microsatellite markers and two mtDNA gene regions. Although M. dolomieu and M. salmoides are distantly related, indicated by the large uncorrected pairwise distances observed between the two species, mitochondrial introgression and unidirectional admixture was detected.

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“…; Lowe et al. ), conditions that may become increasingly common as species rapidly shift—or fail to shift—their spatiotemporal distributions in response to climate change (Kelly et al. ).…”

Section: Introductionmentioning

confidence: 99%