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Modelling the invasion history of Sinanodonta woodiana in Europe: tracking the routes of a sedentary aquatic invader with mobile parasitic larvae

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Adam Konečný, Oana Popa, Veronika Bartáková, Karel Douda, Josef Bryja, Carl Hendrik Smith, Luis Popa, Martin Reichard

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Abstract

Understanding the invasive potential of species outside their native range is one of the most pressing questions in applied evolutionary and ecological research. Admixture of genotypes of invasive species from multiple sources has been implicated in successful invasions, by generating novel genetic combinations that facilitate rapid adaptation to new environments. Alternatively, adaptive evolution on standing genetic variation, exposed by phenotypic plasticity and selected by genetic accommodation, can facilitate invasion success. We investigated the population genetic structure of an Asian freshwater mussel with a parasitic dispersal stage, Sinanodonta woodiana, that has been present in Europe since 1979 but which has expanded rapidly in the last decade. Data from a mitochondrial marker and nuclear microsatellites have suggested that all European populations of S. woodiana originate from the River Yangtze basin in China. Only a single haplotype was detected in Europe, in contrast to substantial mitochondrial diversity in native Asian populations. Analysis of microsatellite markers indicated intensive gene flow and confirmed a lower genetic diversity of European populations compared to those from the Yangtze basin, though that difference was not large. Using an Approximate Bayesian Modelling approach, we identified two areas as the probable source of the spread of S. woodiana in Europe, which matched historical records for its establishment. Their populations originated from a single colonization event. Our data do not support alternative explanations for the rapid recent spread of S. woodiana; recent arrival of a novel (cold‐tolerant) genotype or continuous propagule pressure. Instead, in situ adaptation, facilitated by repeated admixture, appears to drive the ongoing expansion of S. woodiana. We discuss management consequences of our results.
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Original languageEnglish
Pages (from-to)1975-1989
Number of pages15
JournalEvolutionary Applications
Volume11
Issue number10
Early online date20 Oct 2018
DOIs
Publication statusPublished - Dec 2018

    Research areas

  • Anodonta woodiana, Approximate Bayesian computation, Biological invasion, Introduction history, Invasion genetics, Population genetics, Unionid mussel

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