Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic Sea
Genetic connectivity studies are essential to understand species diversity and genetic structure and to assess the role of potential factors affecting connectivity, thus enabling sound management and conservation strategies. Here, we analyzed the patterns of genetic variability in the marine snail G...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-03-01
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| Series: | Frontiers in Genetics |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fgene.2019.00177/full |
| _version_ | 1818308258209726464 |
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| author | Violeta López-Márquez José Templado David Buckley David Buckley David Buckley Ilaria Marino Elisa Boscari Dragos Micu Lorenzo Zane Lorenzo Zane Annie Machordom |
| author_facet | Violeta López-Márquez José Templado David Buckley David Buckley David Buckley Ilaria Marino Elisa Boscari Dragos Micu Lorenzo Zane Lorenzo Zane Annie Machordom |
| author_sort | Violeta López-Márquez |
| collection | DOAJ |
| description | Genetic connectivity studies are essential to understand species diversity and genetic structure and to assess the role of potential factors affecting connectivity, thus enabling sound management and conservation strategies. Here, we analyzed the patterns of genetic variability in the marine snail Gibbula divaricata from five coastal locations in the central-south Adriatic Sea (central Mediterranean) and one in the adjacent northern Ionian Sea, using 21 described polymorphic microsatellite loci. Observed and expected heterozygosity varied from 0.582 to 0.635 and 0.684 to 0.780, respectively. AMOVA analyses showed that 97% of genetic variation was observed within populations. Nevertheless, significant, although small, genetic differentiation was found among nearly all of the pairwise FST comparisons. Over a general pattern of panmixia, three groups of populations were identified: eastern Adriatic populations, western Adriatic populations, and a third group represented by the single northern Ionian Sea population. Nonetheless, migration and gene flow were significant between these groups. Gibbula divaricata is thought to have a limited dispersal capacity related to its lecithotrophic trochophore larval stage. Our results indicated high levels of self-recruitment and gene flow that is mainly driven through coastline dispersion, with populations separated by the lack of suitable habitats or deep waters. This stepping-stone mode of dispersion together with the high levels of self-recruitment could lead to higher levels of population structuring and differentiation along the Adriatic Sea. Large effective population sizes and episodic events of long-distance dispersal might be responsible for the weak differentiation observed in the analyzed populations. In summary, the circulation system operating in this region creates natural barriers for dispersion that, together with life-history traits and habitat requirements, certainly affect connectivity in G. divaricata. However, this scenario of potential differentiation seems to be overridden by sporadic events of long-distance dispersal across barriers and large effective population sizes. |
| first_indexed | 2024-12-13T07:11:25Z |
| format | Article |
| id | doaj.art-3a381580e065476ea6c42a2a0f768a19 |
| institution | Directory Open Access Journal |
| issn | 1664-8021 |
| language | English |
| last_indexed | 2024-12-13T07:11:25Z |
| publishDate | 2019-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Genetics |
| spelling | doaj.art-3a381580e065476ea6c42a2a0f768a192022-12-21T23:55:39ZengFrontiers Media S.A.Frontiers in Genetics1664-80212019-03-011010.3389/fgene.2019.00177416296Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic SeaVioleta López-Márquez0José Templado1David Buckley2David Buckley3David Buckley4Ilaria Marino5Elisa Boscari6Dragos Micu7Lorenzo Zane8Lorenzo Zane9Annie Machordom10Museo Nacional de Ciencias Naturales – Consejo Superior de Investigaciones Científicas, Madrid, SpainMuseo Nacional de Ciencias Naturales – Consejo Superior de Investigaciones Científicas, Madrid, SpainMuseo Nacional de Ciencias Naturales – Consejo Superior de Investigaciones Científicas, Madrid, SpainCentre D’Estudis Avançats de Blanes – Consejo Superior de Investigaciones Científicas, Girona, SpainDepartamento de Biología (Unidad de Genética), Universidad Autónoma de Madrid, Madrid, SpainDepartment of Biology, University of Padova, Padova, ItalyDepartment of Biology, University of Padova, Padova, ItalyNational Institute for Marine Research and Development “Grigore Antipa”, Constanta, RomaniaDepartment of Biology, University of Padova, Padova, ItalyConsorzio Nazionale Interuniversitario per le Scienze del Mare, Rome, ItalyMuseo Nacional de Ciencias Naturales – Consejo Superior de Investigaciones Científicas, Madrid, SpainGenetic connectivity studies are essential to understand species diversity and genetic structure and to assess the role of potential factors affecting connectivity, thus enabling sound management and conservation strategies. Here, we analyzed the patterns of genetic variability in the marine snail Gibbula divaricata from five coastal locations in the central-south Adriatic Sea (central Mediterranean) and one in the adjacent northern Ionian Sea, using 21 described polymorphic microsatellite loci. Observed and expected heterozygosity varied from 0.582 to 0.635 and 0.684 to 0.780, respectively. AMOVA analyses showed that 97% of genetic variation was observed within populations. Nevertheless, significant, although small, genetic differentiation was found among nearly all of the pairwise FST comparisons. Over a general pattern of panmixia, three groups of populations were identified: eastern Adriatic populations, western Adriatic populations, and a third group represented by the single northern Ionian Sea population. Nonetheless, migration and gene flow were significant between these groups. Gibbula divaricata is thought to have a limited dispersal capacity related to its lecithotrophic trochophore larval stage. Our results indicated high levels of self-recruitment and gene flow that is mainly driven through coastline dispersion, with populations separated by the lack of suitable habitats or deep waters. This stepping-stone mode of dispersion together with the high levels of self-recruitment could lead to higher levels of population structuring and differentiation along the Adriatic Sea. Large effective population sizes and episodic events of long-distance dispersal might be responsible for the weak differentiation observed in the analyzed populations. In summary, the circulation system operating in this region creates natural barriers for dispersion that, together with life-history traits and habitat requirements, certainly affect connectivity in G. divaricata. However, this scenario of potential differentiation seems to be overridden by sporadic events of long-distance dispersal across barriers and large effective population sizes.https://www.frontiersin.org/article/10.3389/fgene.2019.00177/fullAdriatic Seagenetic connectivityGibbula divaricatamicrosatellitesdispersal capacity |
| spellingShingle | Violeta López-Márquez José Templado David Buckley David Buckley David Buckley Ilaria Marino Elisa Boscari Dragos Micu Lorenzo Zane Lorenzo Zane Annie Machordom Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic Sea Frontiers in Genetics Adriatic Sea genetic connectivity Gibbula divaricata microsatellites dispersal capacity |
| title | Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic Sea |
| title_full | Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic Sea |
| title_fullStr | Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic Sea |
| title_full_unstemmed | Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic Sea |
| title_short | Connectivity Among Populations of the Top Shell Gibbula divaricata in the Adriatic Sea |
| title_sort | connectivity among populations of the top shell gibbula divaricata in the adriatic sea |
| topic | Adriatic Sea genetic connectivity Gibbula divaricata microsatellites dispersal capacity |
| url | https://www.frontiersin.org/article/10.3389/fgene.2019.00177/full |
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