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Copepod assemblages as a bioindicator of environmental quality in three coastal areas under contrasted anthropogenic inputs (Gulf of Gabes, Tunisia)

Published online by Cambridge University Press:  11 September 2017

Zaher Drira*
Affiliation:
Department of Life Sciences, Sfax Faculty of Sciences, Biodiversity and Aquatic Ecosystems UR/11ES72 Research Unit, University of Sfax, Soukra Road Km 3.5. BP 1171 – PO Box 3000 Sfax, Tunisia
Salma Kmiha-Megdiche
Affiliation:
Department of Life Sciences, Sfax Faculty of Sciences, Biodiversity and Aquatic Ecosystems UR/11ES72 Research Unit, University of Sfax, Soukra Road Km 3.5. BP 1171 – PO Box 3000 Sfax, Tunisia
Houda Sahnoun
Affiliation:
Coastal and Urban Environment Unit, IPEIS, P.C. ‘3000’ Sfax, Tunisia
Marc Tedetti
Affiliation:
Aix Marseille University, CNRS/INSU, University of Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288 Marseille, France
Marc Pagano
Affiliation:
Aix Marseille University, CNRS/INSU, University of Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288 Marseille, France
Habib Ayadi
Affiliation:
Department of Life Sciences, Sfax Faculty of Sciences, Biodiversity and Aquatic Ecosystems UR/11ES72 Research Unit, University of Sfax, Soukra Road Km 3.5. BP 1171 – PO Box 3000 Sfax, Tunisia
*
Correspondence should be addressed to: Z. Drira Department of Life Sciences, Sfax Faculty of Sciences, Biodiversity and Aquatic Ecosystems UR/11ES72 Research Unit, University of Sfax, Soukra Road Km 3.5. BP 1171 – PO Box 3000 Sfax, Tunisia email: zaherdrira@yahoo.fr

Abstract

The study of copepod assemblages indicated the presence of 22 species and 12 families in the southern coast of Sfax, 20 species and 13 families in the northern coast and 14 species and 8 families in the Ghannouch area, with a dominance of Oithonidae (79, 51 and 43% in the southern, northern and Ghannouch coasts, respectively). The relative abundance and the richness diversity of Oithonidae were found to be the most relevant indicators of anthropogenic pollution. Oithona nana, Euterpina acutifrons and Acartia clausi differed significantly in abundance between these three areas under differing degrees of pollution. The study of the structure, composition and density of the copepod fauna showed that the southern coast was a pollution-resistant ecosystem (H′ = 1.49 ± 0.33 bits ind−1; 22 species; density = 51.375 ± 4.340 × 103 ind m−3) followed by Ghannouch area (H′ = 1.74 ± 0.28 bits ind−1; 15 species; density = 11.979 ± 5.651 × 103 ind m−3) and the northern coast, considered as a restored area (H′ = 1.95 ± 0.26 bits ind−1; 21 species; density = 6.516 ± 4.304 × 103 ind m−3). The three ecosystems can thus be classified according to their degree of resistance to the anthropogenic inputs based on the results of the physico-chemical parameters and the species diversity as follows: southern coast > Ghannouch area > northern coast.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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