What are the main environmental factors driving the development of the neurotoxic dinoflagellate Vulcanodinium rugosum in a Mediterranean ecosystem (Ingril lagoon, France)?

Type Article
Date 2018-05
Language English
Author(s) Abadie EricORCID1, Chiantella Claude1, Crottier Anais1, Rhodes Lesley2, Masseret Estelle3, Berteaux Tom1, Laabir Mohamed3
Affiliation(s) 1 : Univ Montpellier, IFREMER, Lab Environm Ressources Languedoc Roussillon,IRD, Ctr Marine Biodivers Exploitat & Conservat MARBEC, CS30171, Sete 03, France.
2 : Cawthron Inst, 98 Halifax St East,Private Bag 2, Nelson 7042, New Zealand.
3 : Univ Montpellier, Ctr Marine Biodivers Exploitat & Conservat MARBEC, CNRS, IRD,Ifremer, Pl E Bataillon,CC93, F-34095 Montpellier 5, France.
Source Harmful Algae (1568-9883) (Elsevier Science Bv), 2018-05 , Vol. 75 , P. 75-86
DOI 10.1016/j.hal.2018.03.012
WOS© Times Cited 7
Keyword(s) Vulcanodinium rugosum, Neurotoxins, Ingril lagoon, Environmental factors, Development dynamic
Abstract

Vulcanodinium rugosum, a dinoflagellate developing in Ingril Lagoon (Mediterranean, France) is responsible for shellfish intoxications due to the neurotoxin pinnatoxin G. A one year survey (March 2012–April 2013) was conducted in this oligotrophic shallow lagoon and key environmental parameters were recorded (temperature, salinity and nutrients). The spatio-temporal distribution of V. rugosum in water column and on macrophytes was also determined. Planktonic cells of V. rugosum were observed at all sampling stations, but in relatively low concentrations (maximum of 1000 cell/L). The highest abundances were observed from June to September 2012. There was a positive correlation between cell densities and both temperature and salinity. Non-motile cells were detected on macrophytes, with a maximum concentration of 6300 cells/g wet weight. Nitrite and ammonium were negatively related to V. rugosum abundance whereas total nitrogen, total phosphorus and phosphates showed a positive correlation. Altogether, in situ results suggest that V. rugosum is rather thermophilic and that organic nutrients should be considered when studying the nutrition requirements for this noxious expanding dinoflagellate.

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Abadie Eric, Chiantella Claude, Crottier Anais, Rhodes Lesley, Masseret Estelle, Berteaux Tom, Laabir Mohamed (2018). What are the main environmental factors driving the development of the neurotoxic dinoflagellate Vulcanodinium rugosum in a Mediterranean ecosystem (Ingril lagoon, France)? Harmful Algae, 75, 75-86. Publisher's official version : https://doi.org/10.1016/j.hal.2018.03.012 , Open Access version : https://archimer.ifremer.fr/doc/00437/54862/