Research Papers

Effects of 17-α-estradiol on a free-living marine nematode community: a microcosm experiment

Published in: African Journal of Aquatic Science
Volume 38, issue 3, 2013 , pages: 305–311
DOI: 10.2989/16085914.2013.832652
Author(s): N EssidLaboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia, F BoufahjaLaboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia, H BeyremLaboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia, P AïssaLaboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia, E MahmoudiLaboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Tunisia

Abstract

A microcosm experiment was used to examine the effects of 17-α-estradiol on a nematode community. Four 17-α-estradiol concentrations (0.15, 0.31, 0.62 and 1.24 ppm) were tested, and effects were examined after 30 days. Significant differences were noted between nematode assemblages from the control and those from 17-α-estradiol treatments. Total nematode abundance, Shannon–Wiener index and evenness were affected by 17-α-estradiol contamination, but species richness was unaffected. Chromadorina metulata and Ascolaimus elongatus were eliminated at all doses tested and seemed to be intolerant to estradiol. Kraspedonema octogoniata decreased at all doses and could be categorised as sensitive to estradiol contamination. Spirinia gerlachi increased at all doses tested and seemed to be an opportunistic species at the doses tested.

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