The Story of a Hitchhiker: Population Genetic Patterns in the Invasive Barnacle Balanus (Amphibalanus) improvisus Darwin 1854

Type Article
Date 2016-01
Language English
Author(s) Wrange Anna-Lisa1, Charrier Gregory2, Thonig Anne3, Rosenblad Magnus Alm4, Blomberg AndersORCID4, Havenhand Jonathan N.1, Jonsson Per R.1, Andre Carl1
Affiliation(s) 1 : Univ Gothenburg, Dept Marine Sci, Tjarno, Sweden.
2 : IUEM, Technopole Brest Iroise, Plouzane, France.
3 : Roskilde Univ, Dept Environm Social & Spatial Change, Roskilde, Denmark.
4 : Univ Gothenburg, Dept Chem & Mol Biol, Gothenburg, Sweden.
Source Plos One (1932-6203) (Public Library Science), 2016-01 , Vol. 11 , N. 1 , P. e0147082 (28p.)
DOI 10.1371/journal.pone.0147082
WOS© Times Cited 19

Understanding the ecological and evolutionary forces that determine the genetic structure and spread of invasive species is a key component of invasion biology. The bay barnacle, Balanus improvisus (= Amphibalanus improvisus), is one of the most successful aquatic invaders worldwide, and is characterised by broad environmental tolerance. Although the species can spread through natural larval dispersal, human-mediated transport through (primarily) shipping has almost certainly contributed to the current global distribution of this species. Despite its worldwide distribution, little is known about the phylogeography of this species. Here, we characterize the population genetic structure and model dispersal dynamics of the barnacle B. improvisus, and describe how human-mediated spreading via shipping as well as natural larval dispersal may have contributed to observed genetic variation. We used both mitochondrial DNA (cytochrome c oxidase subunit I: COI) and nuclear microsatellites to characterize the genetic structure in 14 populations of B. improvisus on a global and regional scale (Baltic Sea). Genetic diversity was high in most populations, and many haplotypes were shared among populations on a global scale, indicating that longdistance dispersal (presumably through shipping and other anthropogenic activities) has played an important role in shaping the population genetic structure of this cosmopolitan species. We could not clearly confirm prior claims that B. improvisus originates from the western margins of the Atlantic coasts; although there were indications that Argentina could be part of a native region. In addition to dispersal via shipping, we show that natural larval dispersal may play an important role for further colonisation following initial introduction.

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Publisher's official version 28 2 MB Open access
S1 Fig. Schematic figures of modeled scenarios of introductory history for Balanus improvisus. 2 MB Open access
S1 Table. Information about the spatial and temporal sampling of DNA from Balanus improvisus. 2 MB Open access
S2 Fig. PCA on summary statistics from the simulated datasets of the four global scenarios and the observed data (yellow) based on; (a) COI sequences and (b) microsatellite loci. 2 MB Open access
S2 Table. Microsatellite primer information. 2 MB Open access
S3 Fig. Maximum likelihood phylogenetic tree based on all B. improvisus individuals in the study. 1 136 KB Open access
S3 Table. Haplotype list with haplotype frequencies (based on COI) for all B. improvisus populations. 2 130 KB Open access
S4 Fig. Multi-dimensional scaling plot (MDS) based on pairwise FST (not corrected for null alleles) for the different microsatellite loci. 2 MB Open access
S4 Table. Summary of microsatellite loci results for each population tested. 2 MB Open access
S5 Fig. Posterior probability of the four ABC modeling scenarios for invasion of B. improvisus on a global scale. 2 MB Open access
S5 Table. Estimated null allele frequencies for microsatellites. 2 MB Open access
S6 Fig. Posterior probability of the two scenarios for introduction of B. improvisus into the Baltic Sea. 2 MB Open access
S6 Table. Pairwise FST between B. improvisus populations based on four microsatellite loci. 2 MB Open access
S7 Table. Analysis of molecular variance (AMOVA) results on B. improvisus 2 MB Open access
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How to cite 

Wrange Anna-Lisa, Charrier Gregory, Thonig Anne, Rosenblad Magnus Alm, Blomberg Anders, Havenhand Jonathan N., Jonsson Per R., Andre Carl (2016). The Story of a Hitchhiker: Population Genetic Patterns in the Invasive Barnacle Balanus (Amphibalanus) improvisus Darwin 1854. Plos One, 11(1), e0147082 (28p.). Publisher's official version : , Open Access version :