Sublethal effects of the antibiotic tylosin on estuarine benthic microalgal communities |
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| Institution: | 1. Marine Science Program, University of South Carolina, Columbia, SC 29208, USA;2. Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA;1. Yokohama Field Station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, Yokohama, Japan;2. Hamanako Branch, Shizuoka Prefectural Research Institute of Fishery and Ocean, Hamamatsu, Japan;3. Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Yokohama, Japan;4. Nikko Field Station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, Nikko, Japan;1. Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, PR China;2. Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Environmental Factors (Wuxi), Ministry of Agriculture, PR China;3. Key Open Laboratory of Ecological Environment and Resources of Inland Fisheries, Chinese Academy of Fishery Sciences, PR China;4. Wuxi Fisheries College of Nanjing Agricultural University, PR China |
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| Abstract: | Pharmaceuticals are common chemical contaminants in estuaries receiving effluent from wastewater and sewage treatment facilities. The purpose of this research was to examine benthic microalgal (BMA) community responses to sublethal exposures to tylosin, a common and environmentally persistent antibiotic. Bioassays, using concentrations of 0.011–218 μmol tylosin l?1, were performed on intertidal muddy sediments from North Inlet Estuary, SC. Exposure to tylosin resulted in a reduction in total BMA biomass and primary productivity. Furthermore, exposure seemed to retard diatom growth while having a minimal effect on cyanobacteria biomass. Estuarine systems receiving chronic inputs of trace concentrations of tylosin, as well as other antibiotics, may experience significant reductions in BMA biomass and primary productivity. Given the well-documented role of BMA in the trophodynamics of estuaries, these impacts will likely be manifested in higher trophic levels with possible impairments of the structure and function of these sensitive systems. |
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