Distribution of dinoflagellate cyst assemblages in recent sediments from a southern Mediterranean lagoon (Mellah, Algeria) with emphasis on toxic species
Type | Article | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Date | 2020-07 | ||||||||||||||||||||
Language | English | ||||||||||||||||||||
Author(s) | Draredja Mohamed Anis1, 2, 5, Frihi Hocine4, Boualleg Chahinaise1, Abadie Eric![]() |
||||||||||||||||||||
Affiliation(s) | 1 : Laboratory of Aquatic and Terrestrial Ecosystems, Faculty of Sciences of Nature and Life, M.C Messaadia University, PB 1553, 41000 Souk Ahras, Algeria 2 : Marine Bioressources Laboratory, Faculty of Sciences, Badji Mokhtar University, PB 12, 23000 Annaba, Algeria 3 : Center for Marine Biodiversity, Exploitation and Conservation (MARBEC), University of Montpellier, IRD, Ifremer, CNRS, 34095 Montpellier Cedex 5, France 4 : Marine Bioressources Laboratory, Faculty of Sciences, Badji Mokhtar University, PB 12, 23000 Annaba, Algeria 5 : Center for Marine Biodiversity, Exploitation and Conservation (MARBEC), University of Montpellier, IRD, Ifremer, CNRS, 34095 Montpellier Cedex 5, France |
||||||||||||||||||||
Source | Environmental Science And Pollution Research (0944-1344) (Springer), 2020-07 , Vol. 27 , N. 20 , P. 25173-25185 | ||||||||||||||||||||
DOI | 10.1007/s11356-020-08830-0 | ||||||||||||||||||||
WOS© Times Cited | 4 | ||||||||||||||||||||
Keyword(s) | Dinoflagellate cysts, Environmental factors, Diversity, Toxic species, Spatial distribution, Mellah lagoon | ||||||||||||||||||||
Abstract | This is the first study on the dinoflagellate cysts inAlgerianwaters and in Mellah Lagoon (SouthWesternMediterranean), located within a protected reserve. In total, 42 species of dinocysts belonging to 7 orders, 12 families and 23 genera, were identified in the 26 superficial sediment samples from Mellah Lagoon. The distribution of dinocysts in the sediment of this lagoon is heteroge- neous. Indeed, their abundance oscillates between 1 and 315 cysts g−1 dry sediment (DS). Cyst morphotype assemblages were dominated by a few numbers of species: Alexandrium minutum (15.87%), Gonyaulax verior (9.81%), Protoperidinium spp. (7.74%), Alexandrium affine (7.05%), Scrippsiella trochoidea (6.67%), and Alexandrium pseudogonyaulax (6.19%). There is a positive correlation between the density of cysts and the depth (r = 0.61; p < 0.05), organic matter (r = 0.70; p < 0.05), water content (r = 0.71; p < 0.05), and the fine fraction of sediment (r = 0.74; p < 0.05). Surprisingly, although the Mellah Lagoon is almost semi-closed, it holds an important specific richness in dinocysts (42 species) higher than others observed in Mediterranean lagoons. However, cyst abundances are low compared to other lagoons in the Mediterranean Sea. Finally, the presence of dinocysts of Alexandrium catenella/tamarense, A. minutum, and Gymnodiniumcatenatum associated to paralytic shellfish toxins, A. pseudogonyaulax which produces goniodomin A, also Protoceratium reticulatum and Gonyaulax spinifera complex which produce yessotoxins, needs to implement a monitoring programto prevent a potential human intoxication due to the consumption of contaminated sea products by these potent neurotoxins. |
||||||||||||||||||||
Full Text |
|