Distribution of potentially toxic epiphytic dinoflagellates in Saint Martin Island (Caribbean Sea, Lesser Antilles)

• Published in: Cryptogamie, Algologie
• Main Authors: Boisnoir, Aurélie, Pascal, Pierre Yves, Chomérat, Nicolas, Lemee, Rodolphe
• Other Authors: Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: Dinoflagellates; Caribbean Sea; Ostreopsis; Gambierdiscus; Prorocentrum; Ciguatera Fish Poisoning (CFP); [SDE.BE]Environmental Sciences/Biodiversity and Ecology; [SDE.ES]Environmental Sciences/Environmental and Society; [SDE.MCG]Environmental Sciences/Global Changes; Martin Island
• Online Access: https://hal.science/hal-03720287; https://hal.science/hal-03720287/document; https://hal.science/hal-03720287/file/CryptoAlg.pdf; https://doi.org/10.5252/cryptogamie-algologie2020v41a7

International audience For the first time, distribution of epiphytic dinoflagellates was studied in Saint Martin Island (Lesser Antilles) during the cyclonic season (between September 1 st and 3 rd 2015). The present study provides a semi-quantitative analysis because the fresh weight of each macrophyte was estimated around 10 g. The identified genera were: Ostreopsis, Prorocentrum, Coolia, Amphidinium, and Gambierdiscus in order of decreasing abundance. Highest average abundance values of the genera Ostreopsis and Amphidinium were hosted by macrophytes of the Phaeophyceae group with ca. 15,000 and 60 cells g-1 respectively. Epiphytic Coolia cells were mainly observed on seagrasses with the highest average abundance value of ca. 1000 cells g-1 whereas the genera Gambierdiscus and Prorocentrum were principally associated with Florideophyceae with the highest average abundances of ca. 70 and 1500 cells g FW-1 respectively. This preliminary study indicates the most relevant locations to survey the biodiversity of potentially toxic epiphytic dinoflagellates in Saint Martin Island.