Ecological succession of pico- and nanophytoplankton in a coastal bay of NW Mediterranean sea
| Type | Article | ||||||||||||||||
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| Date | 2023-03 | ||||||||||||||||
| Language | English | ||||||||||||||||
| Author(s) | Pavaux Anne-Sophie1, Drouet Flora1, Jamet Jean-Louis1, Ginoux Jean-Marc2, Brach-Papa Christophe 3, Sindt-Baret Yanis1, Lenoble Veronique4, Jamet Dominique1 |
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| Affiliation(s) | 1 : Université de Toulon, Mediterranean Institute of Oceanology (MIO), UM 110, CNRS/INSU/IRD, Equipe EMBIO, CS 60584, 83041, Toulon Cedex 9, France 2 : Université de Toulon, Centre de Physique Théorique (CPT), UMR 7332, CNRS, CS 60584, 83041, Toulon Cedex 9, France 3 : Laboratoire Environnement Ressources Provence-Azur-Corse, Ifremer, Centre Méditerranée, Zone Portuaire de Brégaillon, CS20 330, 83507, La Seyne-sur-Mer, Cedex, France 4 : Université de Toulon, Mediterranean Institute of Oceanology (MIO), UM 110, CNRS/INSU/IRD, Equipe CEM, CS 60584, 83041, Toulon Cedex 9, France |
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| Source | Continental Shelf Research (0278-4343) (Elsevier), 2023-03 , Vol. 256 , P. 104948 (10p.) | ||||||||||||||||
| DOI | 10.1016/j.csr.2023.104948 | ||||||||||||||||
| Keyword(s) | Ecological succession, Diversity, Pico-and nanophytoplankton, Mediterranean sea, Rank frequency diagram | ||||||||||||||||
| Abstract | The long-term evolution of pico- and nanophytoplanktonic communities in two coastal contrasting sites from the bay of Toulon was studied using monthly flow cytometry analyses during a seven-year period. Results highlighted higher abundance of both pico- and nanophytoplanktonic communities in the more eutrophic site (i. e. the Little Bay). Moreover, even if both sites were widely dominated by Synechococcus spp. population, it represented more than 90% of the population during summer in the Large Bay. Using diversity indices and rank frequency diagrams to study ecological successions in both sites, communities from the Little Bay (the most polluted site) appeared, paradoxically, as more diversified and more mature than that from the Large Bay. Communities from the Large Bay appeared as less diversified and juvenile linked to the dominance of Synechococcus spp. The complementarity of diversity indices and rank frequency diagram was revealed in this present work. |
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