Marine Science Program, University of South Carolina, Columbia, SC 29208, USA.
Mar Pollut Bull. 2013 Mar 15;68(1-2):8-12. doi: 10.1016/j.marpolbul.2013.01.006. Epub 2013 Feb 8.
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.
制药厂是从废水和污水处理厂排放的污水中进入河口的常见化学污染物。本研究的目的是研究底栖微藻（BMA）群落对替米考星（一种常见且在环境中持久存在的抗生素）亚致死暴露的反应。使用 0.011-218 μmol 替米考星 l(-1)的浓度，在南卡罗来纳州北入口河口的潮间带泥泞沉积物上进行了生物测定。替米考星暴露导致总 BMA 生物量和初级生产力降低。此外，暴露似乎会减缓硅藻的生长，而对蓝藻生物量的影响最小。接收痕量替米考星和其他抗生素慢性输入的河口系统可能会经历 BMA 生物量和初级生产力的显著减少。鉴于 BMA 在河口营养动态中的作用已得到充分记录，这些影响可能会在更高的营养水平上表现出来，并可能损害这些敏感系统的结构和功能。
