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      Genetic structure provides insights into the geographic origins and temporal change in the invasive charru mussel (Sururu) in the southeastern United States

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          Abstract

          In 2004, Mytella charruana (d'Orbigny, 1842) (Mollusca: Bivalvia: Mytilidae) became established along the coast of the southeastern United States (SE-US). Using mitochondrial DNA sequencing (cytochrome c oxidase subunit I), we compared genetic variation throughout its native range in South America to its invasive range in the SE-US. Samples from the SE-US were collected in 2006 and 2010 enabling a temporal comparison to evaluate possible genetic changes of the invasive population. We addressed two questions. First, what are the potential source populations (or geographic regions) for the SE-US invasion? Second, how has genetic diversity changed between the two sampling periods within the SE-US? We identified a total of 72 haplotypes, 64 of which were isolated to geographic sites and only 8 were shared among sites. The highly structured native range provides insight into the origin of invasive populations where our results suggest that the introduced SE-US population originated from multiple source populations with the Panama region as the primary source. Additionally, our results indicate that genetic composition of the non-native populations was unchanged between the two sampling periods. Mytella charruana exhibit a significant pattern of genetic structure among natural populations, owing to biogeographic barriers that limit natural dispersal, and an ability to persist in novel habitats, owing to a suite of life-history characters that favor survival under variable conditions. Overall, this study explains why M. charruana may become an increasing threat to locations founded by anthropogenic transportation.

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          Molecular Cloning : A Laboratory Manual

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            The evolutionary impact of invasive species.

            Since the Age of Exploration began, there has been a drastic breaching of biogeographic barriers that previously had isolated the continental biotas for millions of years. We explore the nature of these recent biotic exchanges and their consequences on evolutionary processes. The direct evidence of evolutionary consequences of the biotic rearrangements is of variable quality, but the results of trajectories are becoming clear as the number of studies increases. There are examples of invasive species altering the evolutionary pathway of native species by competitive exclusion, niche displacement, hybridization, introgression, predation, and ultimately extinction. Invaders themselves evolve in response to their interactions with natives, as well as in response to the new abiotic environment. Flexibility in behavior, and mutualistic interactions, can aid in the success of invaders in their new environment.
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              A cladistic analysis of phenotypic associations with haplotypes inferred from restriction endonuclease mapping and DNA sequence data. III. Cladogram estimation.

              We previously developed a cladistic approach to identify subsets of haplotypes defined by restriction endonuclease mapping or DNA sequencing that are associated with significant phenotypic deviations. Our approach was limited to segments of DNA in which little recombination occurs. In such cases, a cladogram can be constructed from the restriction site or sequence data that represents the evolutionary steps that interrelate the observed haplotypes. The cladogram is used to define a nested statistical design to identify mutational steps associated with significant phenotypic deviations. The central assumption behind this strategy is that any undetected mutation causing a phenotypic effect is embedded within the same evolutionary history that is represented by the cladogram. The power of this approach depends upon the confidence one has in the particular cladogram used to draw inferences. In this paper, we present a strategy for estimating the set of cladograms that are consistent with a particular sample of either restriction site or nucleotide sequence data and that includes the possibility of recombination. We first evaluate the limits of parsimony in constructing cladograms. Once these limits have been determined, we construct the set of parsimonious and nonparsimonious cladograms that is consistent with these limits. Our estimation procedure also identifies haplotypes that are candidates for being products of recombination. If recombination is extensive, our algorithm subdivides the DNA region into two or more subsections, each having little or no internal recombination. We apply this estimation procedure to three data sets to illustrate varying degrees of cladogram ambiguity and recombination.
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                Author and article information

                Contributors
                Role: ConceptualizationRole: Data curationRole: Formal analysisRole: InvestigationRole: MethodologyRole: Project administrationRole: VisualizationRole: Writing – original draftRole: Writing – review & editing
                Role: ConceptualizationRole: Funding acquisitionRole: ResourcesRole: Writing – review & editing
                Role: ConceptualizationRole: ResourcesRole: Writing – review & editing
                Role: ConceptualizationRole: Writing – review & editing
                Role: ConceptualizationRole: Data curationRole: Funding acquisitionRole: InvestigationRole: MethodologyRole: Project administrationRole: ResourcesRole: SupervisionRole: ValidationRole: Writing – review & editing
                Role: Editor
                Journal
                PLoS One
                PLoS ONE
                plos
                plosone
                PLoS ONE
                Public Library of Science (San Francisco, CA USA )
                1932-6203
                7 July 2017
                2017
                : 12
                : 7
                : e0180619
                Affiliations
                [1 ]Department de Biologia Marinha, Universidade Federal Fluminense - UFF, Niterói, Rio de Janeiro, Brazil
                [2 ]Department de Oceanography, Instituto de Estudos do Mar Almirante Paulo Moreira - IEAPM, Arraial do Cabo, Rio de Janeiro, Brazil
                [3 ]Department of Biology, University of Central Florida, Orlando, Florida, United States of America
                National Cheng Kung University, TAIWAN
                Author notes

                Competing Interests: The authors have declared that no competing interests exist.

                Author information
                http://orcid.org/0000-0002-2725-9202
                http://orcid.org/0000-0002-2432-3619
                Article
                PONE-D-17-04238
                10.1371/journal.pone.0180619
                5501563
                28686694
                80f39ef1-6c45-4429-9da7-7644b941131f
                © 2017 Calazans C et al

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 1 February 2017
                : 19 June 2017
                Page count
                Figures: 5, Tables: 1, Pages: 19
                Funding
                Funded by: US Fullbright program
                Funded by: USDA NIFA
                Award ID: 2008-32320-04574
                Award Recipient :
                Funded by: Bolsas no Exterior - Ciência sem Fronteiras / Doutorado Sanduíche
                Award ID: SWE (CsF) Número do Processo: 245894/2012-8
                Funded by: the Indian River Lagoon National Estuary Program
                Funded by: University of Central Florida (US)
                Funded by: Universidade Federal Fluminense
                Funded by: Instituto de Estudos do Mar Almirante Paulo Moreira
                Thanks for Brazilian CAPES – National Council for Scientific and Technological Development for the Ph.D. fellowship support to SHCC, and the Brazilian grant program - Bolsas no Exterior - Ciência sem Fronteiras / Doutorado Sanduíche - SWE (CsF) Número do Processo: 245894/2012-8, and the US Fulbright program. This research was also supported by USDA NIFA Award No. 2008-32320-04574, the Indian River Lagoon National Estuary Program, the University of Central Florida, the Universidade Federal Fluminense and the Instituto de Estudos do Mar Almirante Paulo Moreira. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
                Categories
                Research Article
                Biology and Life Sciences
                Evolutionary Biology
                Population Genetics
                Biology and Life Sciences
                Genetics
                Population Genetics
                Biology and Life Sciences
                Population Biology
                Population Genetics
                Biology and Life Sciences
                Genetics
                Heredity
                Genetic Mapping
                Haplotypes
                Ecology and Environmental Sciences
                Species Colonization
                Invasive Species
                Biology and Life Sciences
                Biogeography
                Phylogeography
                Ecology and Environmental Sciences
                Biogeography
                Phylogeography
                Earth Sciences
                Geography
                Biogeography
                Phylogeography
                Biology and Life Sciences
                Evolutionary Biology
                Population Genetics
                Phylogeography
                Biology and Life Sciences
                Genetics
                Population Genetics
                Phylogeography
                Biology and Life Sciences
                Population Biology
                Population Genetics
                Phylogeography
                Biology and life sciences
                Genetics
                DNA
                Forms of DNA
                Mitochondrial DNA
                Biology and life sciences
                Biochemistry
                Nucleic acids
                DNA
                Forms of DNA
                Mitochondrial DNA
                People and places
                Geographical locations
                South America
                Brazil
                Biology and Life Sciences
                Organisms
                Animals
                Invertebrates
                Molluscs
                Bivalves
                Mussels
                People and places
                Geographical locations
                North America
                Central America
                Panama
                Custom metadata
                Data are available on GeneBank (accession numbers MF074963 - MF075128).

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