Article (Scientific journals)
Seasonal variations of phytoplankton community in relation to environmental factors in a protected meso-oligotrophic southern Mediterranean marine ecosystem (Mellah lagoon, Algeria) with an emphasis of HAB species
Draredja, Mohamed Anis; Frihi, Hocine; Chahinaise, Boualleg et al.
2019In Environmental Monitoring and Assessment, 191 (603)
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Keywords :
Phytoplankton monitoring; Environmental conditions; Diversity; HAB species; Mediterranean lagoon
Abstract :
[en] The spatial and temporal variation of phytoplankton communities including HAB species in relation to the environmental characteristics was investigated in the protected meso-oligotrophic Mellah lagoon located in the South Western Mediterranean. During 2016, a biweekly monitoring of phytoplankton assemblages and the main abiotic factors were realized at three representative stations. Taxonomic composition, abundance, and diversity index were determined. In total, 227 phytoplankton species (160 diatoms and 53 dinoflagellates) were inventoried. There was a clear dominance of diatoms (62.9%) compared with dinoflagellates (36.8%). Diatoms dominated in spring and dinoflagellates developed in summer and early autumn in Mellah showing a marked seasonal trend. Data showed that the dynamic of the phytoplankton taxa evolving in the lagoon was mainly driven by temperature and salinity. For the first time, a number of potentially toxic species have been identified, including 2 diatoms (Pseudo-nitzschia group delicatissima, Pseudo-nitzschia group seriata) and 5 dinoflagellates (Alexandrium minutum, Alexandrium tamarense/catenella, Dinophysis acuminata, Dinophysis sacculus, Prorocentrum lima). These harmful species could threat the functioning of the Mellah lagoon and human health and require the establishment of a monitoring network. Finally, our study suggests that the observed decrease of the phytoplankton diversity between 2001 and 2016 could result from the reduction in water exchanges between the lagoon and the adjacent coast following the gradual clogging of the channel.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Draredja, Mohamed Anis;  Laboratory of Aquatic and Terrestrial Ecosystems > Faculty of Sciences of Nature and Life > M.C Messaadia University, Souk Ahras, Algeria
Frihi, Hocine;  Marine Bioresources Laboratory, > Faculty of Science > Badji Mokhtar University > Annaba, Algeria
Chahinaise, Boualleg;  Laboratory of Aquatic and Terrestrial Ecosystems > Faculty of Sciences of Nature and Life > M.C Messaadia University, Souk Ahras, Algeria
Goffart, Anne  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Abadie, Eric;  Center for Marine Biodiversity, Exploitation and Conservation (MARBEC) > IRD, Ifremer, CNRS, Université de Montpellier > Montpellier CEDEX 5 France
Laabir, Mohamed;  Center for Marine Biodiversity, Exploitation and Conservation (MARBEC) > IRD, Ifremer, CNRS, Université de Montpellier > Montpellier CEDEX 5 France
Language :
English
Title :
Seasonal variations of phytoplankton community in relation to environmental factors in a protected meso-oligotrophic southern Mediterranean marine ecosystem (Mellah lagoon, Algeria) with an emphasis of HAB species
Publication date :
September 2019
Journal title :
Environmental Monitoring and Assessment
ISSN :
0167-6369
eISSN :
1573-2959
Publisher :
Kluwer Academic Publishers, Netherlands
Volume :
191
Issue :
603
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
LAGUNOTOX research project
Funders :
TOTAL Foundation
Algerian Minestry of High Education and Scientific Research
Montpellier University. MARBEC laboratory
IRD - Institut de Recherche pour le Développement [FR]
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