Oceanographic Conditions Limit the Spread of a Marine Invader along Southern African Shores
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{"title"=>"Oceanographic conditions limit the spread of a marine invader along southern African shores", "type"=>"journal", "authors"=>[{"first_name"=>"Jorge", "last_name"=>"Assis", "scopus_author_id"=>"53463298700"}, {"first_name"=>"Mirta", "last_name"=>"Zupan", "scopus_author_id"=>"57198078744"}, {"first_name"=>"Katy R.", "last_name"=>"Nicastro", "scopus_author_id"=>"12646675100"}, {"first_name"=>"Gerardo I.", "last_name"=>"Zardi", "scopus_author_id"=>"12647766300"}, {"first_name"=>"Christopher D.", "last_name"=>"McQuaid", "scopus_author_id"=>"7005808952"}, {"first_name"=>"Ester A.", "last_name"=>"Serrão", "scopus_author_id"=>"7004093604"}], "year"=>2015, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-84938390065", "sgr"=>"84938390065", "issn"=>"19326203", "arxiv"=>"2798", "doi"=>"10.1371/journal.pone.0128124", "pmid"=>"26114766", "pui"=>"605407787"}, "id"=>"973ad23f-f83b-36e1-a394-e98f27b5af87", "abstract"=>"Invasive species can affect the function and structure of natural ecological communities, hence understanding and predicting their potential for spreading is a major ecological challenge. Once established in a new region, the spread of invasive species is largely controlled by their dispersal capacity, local environmental conditions and species interactions. The mussel Mytilus galloprovincialis is native to the Mediterranean and is the most successful marine invader in southern Africa. Its distribution there has expanded rapidly and extensively since the 1970s, however, over the last decade its spread has ceased. In this study, we coupled broad scale field surveys, Ecological Niche Modelling (ENM) and Lagrangian Particle Simulations (LPS) to assess the current invaded distribution of M. galloprovincialis in southern Africa and to evaluate what prevents further spread of this species. Results showed that all environmentally suitable habitats in southern Africa have been occupied by the species. This includes rocky shores between Rocky Point in Namibia and East London in South Africa (approx. 2800 km) and these limits coincide with the steep transitions between cool-temperate and subtropical-warmer climates, on both west and southeast African coasts. On the west coast, simulations of drifting larvae almost entirely followed the northward and offshore direction of the Benguela current, creating a clear dispersal barrier by advecting larvae away from the coast. On the southeast coast, nearshore currents give larvae the potential to move eastwards, against the prevalent Agulhas current and beyond the present distributional limit, however environmental conditions prevent the establishment of the species. The transition between the cooler and warmer water regimes is therefore the main factor limiting the northern spread on the southeast coast; however, biotic interactions with native fauna may also play an important role.", "link"=>"http://www.mendeley.com/research/oceanographic-conditions-limit-spread-marine-invader-along-southern-african-shores", "reader_count"=>38, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>2, "Researcher"=>10, "Student > Ph. D. Student"=>10, "Student > Postgraduate"=>1, "Student > Master"=>8, "Other"=>1, "Student > Bachelor"=>2, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>2, "Researcher"=>10, "Student > Ph. D. Student"=>10, "Student > Postgraduate"=>1, "Student > Master"=>8, "Other"=>1, "Student > Bachelor"=>2, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Environmental Science"=>4, "Biochemistry, Genetics and Molecular Biology"=>1, "Agricultural and Biological Sciences"=>28, "Computer Science"=>1, "Earth and Planetary Sciences"=>2}, "reader_count_by_subdiscipline"=>{"Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>28}, "Computer Science"=>{"Computer Science"=>1}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>2}, "Environmental Science"=>{"Environmental Science"=>4}}, "reader_count_by_country"=>{"United States"=>1, "Denmark"=>1, "Brazil"=>1, "United Kingdom"=>1}, "group_count"=>5}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/2152139"], "description"=>"<p>(a) Records of occurrence for <i>M</i>. <i>galloprovincialis</i> throughout the southern African coast (Red dots for presence and blue dots for absence). (b) Reclassified ensemble showing the occurrence of <i>M</i>. <i>galloprovincialis</i> for the present (2000–2010). Numbers show Regions Of Interest: ROI 1. Rocky Point, ROI 2. Walvis Bay, ROI 3. Sossusvlei, ROI 4. Elizabeth Bay, ROI 5. Cape Town, ROI 6. Port Elizabeth, ROI 7. East London, ROI 8. Durban. The dashed squares indicate those regions where the Lagrangian Particle Simulations where performed: the west coast, from Capulo to Walvis Bay, and the southeast coast, from St Francis Bay to Beira. Credits for the background of both maps: General Bathymetric Chart of the Oceans (GEBCO).</p>", "links"=>[], "tags"=>["mussel Mytilus galloprovincialis", "2800 km", "spread", "lps", "move eastwards", "dispersal barrier", "Rocky Point", "Ecological Niche Modelling", "water regimes", "west Coast", "enm", "scale field surveys", "nearshore currents", "distributional limit", "oceanographic conditions", "advecting larvae", "Shores Invasive species", "African coasts", "East London", "Lagrangian Particle Simulations", "biotic interactions", "dispersal capacity", "Marine Invader", "Species interactions"], "article_id"=>1465646, "categories"=>["Uncategorised"], "users"=>["Jorge Assis", "Mirta Zupan", "Katy R. Nicastro", "Gerardo I. Zardi", "Christopher D. McQuaid", "Ester A. Serrão"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0128124.g001", "stats"=>{"downloads"=>0, "page_views"=>13, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Oceanographic_Conditions_Limit_the_Spread_of_a_Marine_Invader_along_Southern_African_Shores_Fig_1_/1465646", "title"=>"Oceanographic Conditions Limit the Spread of a Marine Invader along Southern African Shores - Fig 1", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-26 03:34:34"}
  • {"files"=>["https://ndownloader.figshare.com/files/2152163", "https://ndownloader.figshare.com/files/2152164", "https://ndownloader.figshare.com/files/2152165"], "description"=>"<div><p>Invasive species can affect the function and structure of natural ecological communities, hence understanding and predicting their potential for spreading is a major ecological challenge. Once established in a new region, the spread of invasive species is largely controlled by their dispersal capacity, local environmental conditions and species interactions. The mussel <i>Mytilus galloprovincialis</i> is native to the Mediterranean and is the most successful marine invader in southern Africa. Its distribution there has expanded rapidly and extensively since the 1970s, however, over the last decade its spread has ceased. In this study, we coupled broad scale field surveys, Ecological Niche Modelling (ENM) and Lagrangian Particle Simulations (LPS) to assess the current invaded distribution of <i>M</i>. <i>galloprovincialis</i> in southern Africa and to evaluate what prevents further spread of this species. Results showed that all environmentally suitable habitats in southern Africa have been occupied by the species. This includes rocky shores between Rocky Point in Namibia and East London in South Africa (approx. 2800 km) and these limits coincide with the steep transitions between cool-temperate and subtropical-warmer climates, on both west and southeast African coasts. On the west coast, simulations of drifting larvae almost entirely followed the northward and offshore direction of the Benguela current, creating a clear dispersal barrier by advecting larvae away from the coast. On the southeast coast, nearshore currents give larvae the potential to move eastwards, against the prevalent Agulhas current and beyond the present distributional limit, however environmental conditions prevent the establishment of the species. The transition between the cooler and warmer water regimes is therefore the main factor limiting the northern spread on the southeast coast; however, biotic interactions with native fauna may also play an important role.</p></div>", "links"=>[], "tags"=>["mussel Mytilus galloprovincialis", "2800 km", "spread", "lps", "move eastwards", "dispersal barrier", "Rocky Point", "Ecological Niche Modelling", "water regimes", "west Coast", "enm", "scale field surveys", "nearshore currents", "distributional limit", "oceanographic conditions", "advecting larvae", "Shores Invasive species", "African coasts", "East London", "Lagrangian Particle Simulations", "biotic interactions", "dispersal capacity", "Marine Invader", "Species interactions"], "article_id"=>1465667, "categories"=>["Uncategorised"], "users"=>["Jorge Assis", "Mirta Zupan", "Katy R. Nicastro", "Gerardo I. Zardi", "Christopher D. McQuaid", "Ester A. Serrão"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0128124.s001", "https://dx.doi.org/10.1371/journal.pone.0128124.s002", "https://dx.doi.org/10.1371/journal.pone.0128124.s003"], "stats"=>{"downloads"=>1, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Oceanographic_Conditions_Limit_the_Spread_of_a_Marine_Invader_along_Southern_African_Shores_/1465667", "title"=>"Oceanographic Conditions Limit the Spread of a Marine Invader along Southern African Shores", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2015-06-26 03:34:34"}
  • {"files"=>["https://ndownloader.figshare.com/files/2152156"], "description"=>"<p>Black circles show locations where <i>M</i>. <i>galloprovincialis</i> occurs, while the open red circles show where the niche models predicted northern edges.</p>", "links"=>[], "tags"=>["mussel Mytilus galloprovincialis", "2800 km", "spread", "lps", "move eastwards", "dispersal barrier", "Rocky Point", "Ecological Niche Modelling", "water regimes", "west Coast", "enm", "scale field surveys", "nearshore currents", "distributional limit", "oceanographic conditions", "advecting larvae", "Shores Invasive species", "African coasts", "East London", "Lagrangian Particle Simulations", "biotic interactions", "dispersal capacity", "Marine Invader", "Species interactions"], "article_id"=>1465660, "categories"=>["Uncategorised"], "users"=>["Jorge Assis", "Mirta Zupan", "Katy R. Nicastro", "Gerardo I. Zardi", "Christopher D. McQuaid", "Ester A. Serrão"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0128124.g004", "stats"=>{"downloads"=>0, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Potential_connectivity_matrices_for_the_Lagrangian_Particle_Simulations_performed_on_the_a_west_and_b_southeast_coasts_of_southern_Africa_using_a_PLD_of_30_days_/1465660", "title"=>"Potential connectivity matrices for the Lagrangian Particle Simulations performed on the (a) west and (b) southeast coasts of southern Africa using a PLD of 30 days.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-26 03:34:34"}
  • {"files"=>["https://ndownloader.figshare.com/files/2152142"], "description"=>"<p>Asterisks show the predictors included in the final ensemble.</p>", "links"=>[], "tags"=>["mussel Mytilus galloprovincialis", "2800 km", "spread", "lps", "move eastwards", "dispersal barrier", "Rocky Point", "Ecological Niche Modelling", "water regimes", "west Coast", "enm", "scale field surveys", "nearshore currents", "distributional limit", "oceanographic conditions", "advecting larvae", "Shores Invasive species", "African coasts", "East London", "Lagrangian Particle Simulations", "biotic interactions", "dispersal capacity", "Marine Invader", "Species interactions"], "article_id"=>1465649, "categories"=>["Uncategorised"], "users"=>["Jorge Assis", "Mirta Zupan", "Katy R. Nicastro", "Gerardo I. Zardi", "Christopher D. McQuaid", "Ester A. Serrão"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0128124.g002", "stats"=>{"downloads"=>0, "page_views"=>16, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Environmental_predictors_used_in_niche_modelling_as_Long_Term_Averages_LTA_type_of_data_M_8212_Modelled_RS_8212_Remote_sensing_DO_8212_Direct_observation_units_and_relative_importance_on_cross_validation_TSS_8212_True_Skill_Statistics_/1465649", "title"=>"Environmental predictors used in niche modelling as Long Term Averages (LTA), type of data (M—Modelled; RS—Remote sensing; DO—Direct observation), units and relative importance on cross-validation (TSS—True Skill Statistics).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-26 03:34:34"}
  • {"files"=>["https://ndownloader.figshare.com/files/2152151"], "description"=>"<p>The grey polygon indicates the overall environmental space of the species. The significance levels of the permutational multivariate ANOVA (PERMANOVA) and permutational analysis of multivariate dispersion (PERMDISP) to test for niche divergence between native and non-native ranges are shown.</p>", "links"=>[], "tags"=>["mussel Mytilus galloprovincialis", "2800 km", "spread", "lps", "move eastwards", "dispersal barrier", "Rocky Point", "Ecological Niche Modelling", "water regimes", "west Coast", "enm", "scale field surveys", "nearshore currents", "distributional limit", "oceanographic conditions", "advecting larvae", "Shores Invasive species", "African coasts", "East London", "Lagrangian Particle Simulations", "biotic interactions", "dispersal capacity", "Marine Invader", "Species interactions"], "article_id"=>1465658, "categories"=>["Uncategorised"], "users"=>["Jorge Assis", "Mirta Zupan", "Katy R. Nicastro", "Gerardo I. Zardi", "Christopher D. McQuaid", "Ester A. Serrão"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0128124.g003", "stats"=>{"downloads"=>2, "page_views"=>30, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Principal_Component_Analysis_PCA_of_the_environmental_space_used_by_native_grey_circles_and_non_native_red_circles_occurrences_of_M_galloprovincialis_/1465658", "title"=>"Principal Component Analysis (PCA) of the environmental space used by native (grey circles) and non-native (red circles) occurrences of <i>M. galloprovincialis</i>.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-26 03:34:34"}

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Relative Metric

{"start_date"=>"2015-01-01T00:00:00Z", "end_date"=>"2015-12-31T00:00:00Z", "subject_areas"=>[]}
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