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<title lang=en>Fish community structure in relation to environmental variation in coastal volcanic habitats</title>
<creator>Pinault, Mathieu</creator>
<creator>Bissery, Claire</creator>
<creator>Gassiole, Gilles</creator>
<creator>Magalon, Hélène</creator>
<creator>Quod, Jean-Pascal</creator>
<creator>Galzin, René</creator>
<contributor>Laboratoire d'Ecologie Marine (ECOMAR) ; Université de la Réunion (UR)</contributor>
<contributor>Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) ; Université de Perpignan Via Domitia (UPVD) - École pratique des hautes études (EPHE) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Chercheur Indépendant</contributor>
<contributor>Ecosystèmes aquatiques et changements globaux (UR EABX) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)</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>Agence pour la Recherche et la Valorisation Marines - ARVAM (Ste Clotilde, La réunion-France) ; Agence pour la Recherche et la Valorisation Marines - ARVAM (Ste Clotilde, La réunion-France)</contributor>
<description>International audience</description>
<source>ISSN: 0022-0981</source>
<source>Journal of Experimental Marine Biology and Ecology</source>
<publisher>Elsevier</publisher>
<identifier>hal-01253768</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01253768</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01253768/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01253768/file/Pinault%20et%20al.%20-%202014%20-%20Fish%20community%20structure%20in%20relation%20to%20environmen_hal.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01253768</source>
<source>Journal of Experimental Marine Biology and Ecology, Elsevier, 2014, 460, 〈10.1016/j.jembe.2014.06.005〉</source>
<identifier>DOI : 10.1016/j.jembe.2014.06.005</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jembe.2014.06.005</relation>
<language>en</language>
<subject>[SDE.BE] Environmental Sciences/Biodiversity and Ecology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>This study constitutes one of the few works conducted on the colonization of recent lava flows by fish communities in coral reef environment. It attempted to describe the mechanisms of colonization and environmental variables infuencing the structure of communities on the lava flows of the Piton de la Fournaise volcano at Reunion Island. It also proposed some hypotheses on the mechanisms of selection and speciation of endemic species of thesouthwestern Indian Ocean region, particularly diversified on the most recent lava flows of the Piton de la Fournaise, and provided a model of distribution of environmental and fish assemblage variables in four homogeneous patterns of colonization (landscapes) retained within the study area. The results showed fish community structure strongly related to measured environmental variables, of which depth, width of the island shelf, age of the lava flow and distance to the most recent lava flow were the most influential. It also appeared that the maximum endemic species richness was measured on the shallower stations, with narrow insular shelf, located on recent lava flows, near the lava flow from the eruption of 2007 (latest volcanic event). These characteristics define a harsh environment, to which endemic species seem well-adapted due in particular to their strong demographic and dietary flexibility. Finally, the patterns of colonization were characterized by significantly different environmental variables. The four homogeneous areas, defined by two geomorphological features, basalt blocks and drop-offs, nested within two locations, inside and outside the volcanic enclosure (current caldera), hosted fish communities whose dominant diets mainly depend on the nature, the abundance and the accessibility of available food resources. Overall, the study highlights that during early stages of ecological succession, site selection by fish communities is highly dependent on environmental constraints, specially of volcanic origin, but the physical habitat selection (geomorphology, substrate rugosity, percentage of soft substrate) seems to have littleimportance, while at least on the trophic structure and the distribution of endemic species. </description>
<date>2014-11</date>
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