SDRP Journal of Earth Sciences & Environmental Studies

Spatial pattern of ciliates in relation to environmental factors at Sfax south coast (Gulf of Gabes, Tunisia)

Citation

Zohra, Spatial pattern of ciliates in relation to environmental factors at Sfax south coast (Gulf of Gabes, Tunisia)(2016)SDRP Journal of Earth Sciences & Environmental Studies 1(2)

Abstract

Data for ciliate abundance, biomass composition, with relevant physicochemical parameters, were studied in the south of Sfax from twenty stations during winter 2008. A total of 18 ciliate taxa representing 10 different genera were identified during the monitoring periods. The Tintinnida group is the most diversified (11 species) accounting for 77% and 92% of the total abundance and biomass, respectively, followed by Choreotrichida and Strombidiida. The ciliate assemblage is dominated by the medium-sized (from 30 µm to 60µm) species and T. beroidea, T. balechi and T. nana are the most abundant. High chlorophyll-a concentration, N/P ratio lower than the Redfield and low Shannon index of ciliate indicated that the water quality of the south coast of Sfax is degraded. So, the coupling of the chemical and biological parameters may serve as good tools to monitor the marine ecosystems.

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