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<publisher>HAL CCSD</publisher>
<title lang=en>Population differentiation or species formation across the Indian and the Pacific Oceans? An example from the brooding marine hydrozoan Macrorhynchia phoenicea</title>
<creator>Postaire, Bautisse</creator>
<creator>Gelin, Pauline</creator>
<creator>Bruggemann, J. Henrich</creator>
<creator>Pratlong, Marine</creator>
<creator>Magalon, Hélène</creator>
<contributor>Ecologie marine tropicale dans les Océans Pacifique et Indien (ENTROPIE [Réunion]) ; Institut de Recherche pour le Développement (IRD) - Université de la Réunion (UR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire d'Excellence CORAIL (LabEX CORAIL) ; Institut de Recherche pour le Développement (IRD) - Université des Antilles et de la Guyane (UAG) - École des hautes études en sciences sociales (EHESS) - École pratique des hautes études (EPHE) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Université de la Réunion (UR) - Université de la Polynésie Française (UPF) - Université de Nouvelle Calédonie - Institut d'écologie et environnement</contributor>
<contributor>Institut de Mathématiques de Marseille (I2M) ; Aix Marseille Université (AMU) - Ecole Centrale de Marseille (ECM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 2045-7758</source>
<source>Ecology and Evolution</source>
<publisher>Wiley Open Access</publisher>
<identifier>hal-01681593</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01681593</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01681593</source>
<source>Ecology and Evolution, Wiley Open Access, 2017, 7 (20), pp.8170-8186. 〈10.1002/ece3.3236〉</source>
<identifier>DOI : 10.1002/ece3.3236</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.3236</relation>
<language>en</language>
<subject>[SDE] Environmental Sciences</subject>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</subject>
<subject>[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Assessing population connectivity is necessary to construct effective marine protected areas. This connectivity depends, among other parameters, inherently on species dispersal capacities. Isolation by distance (IBD) is one of the main modes of differentiation in marine species, above all in species presenting low dispersal abilities. This study reports the genetic structuring in the tropical hydrozoan Macrorhynchia phoenicea (sensu Postaire et al., 2016a), a brooding species, from 30 sampling sites in the Western Indian Ocean and the Tropical Southwestern Pacific, using 15 microsatellite loci. At the local scale, genet dispersal relied on asexual propagation at short distance, which was not found at larger scales. Considering one representative per clone, significant positive F-IS values (from -0.327*** to 0.411***) were found within almost all sites. Gene flow was extremely low at all spatial scales, among sites within islands (<10km distance) and among islands (100 to >11,000km distance), with significant pairwise F-ST values (from 0.035*** to 0.645***). A general pattern of IBD was found at the Indo-Pacific scale, but also within ecoregions in the Western Indian Ocean province. Clustering and network analyses identified each island as a potential independent population, while analysis of molecular variance indicated that population genetic differentiation was significant at small (within island) and intermediate (among islands within province) spatial scales. As shown by this species, a brooding life cycle might be corollary of the high population differentiation found in some coastal marine species, thwarting regular dispersal at distances more than a few kilometers and probably leading to high cryptic diversity, each island housing independent evolutionary lineages.</description>
<date>2017</date>
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