王作铭;陈军;陈静;徐汉杰;

• 1:上海师范大学生命与环境科学学院

摘要(Abstract)：

针对上海地区地表水中混合并持久残留的抗生素对水生态的危害,测试了3种主要被使用的抗生素(磺胺甲恶唑,SMZ;土霉素,OTC;氟苯尼考,FF)对4个不同营养级的水生生物代表种(蛋白核小球藻、费氏弧菌、大型蚤和斑马鱼胚胎)的单一毒性和联合毒性,并进一步对生态风险进行评估来探究抗生素对水生态系统的综合作用。研究表明:水生生物对单一抗生素暴露的毒性敏感顺序为:蛋白核小球藻>斑马鱼胚胎>费氏弧菌>大型蚤。用联合指数(CI)来评价抗生素二元混合物之间的相互作用时发现对于不同水生模式生物,抗生素之间的相互作用方式以拮抗作用(CI>1)为主。通过与浓度加和(CA)和独立作用(IA)2个传统模型的预测效果比较,发现CI模型能准确预测到抗生素联合毒性偏离相加作用。由于养殖废水中这3种抗生素的含量均远高于其他水体(如黄浦江、长江口、工厂废水),其对不同营养级的水生生物均表现出较高的风险性,需要对养殖废水采取相应的风险削减措施;相比之下,其他水体中抗生素对费氏弧菌、斑马鱼胚胎、大型蚤均表现出低风险,但是对蛋白核小球藻仍具有一定的风险性,需要警惕抗生素对水体初级生产者的风险性。

关键词(KeyWords)： 抗生素;水生生物;联合毒性;生态风险评价;CI模型;复合残留

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(31070671);; 上海市科委项目(11440502300)

作者(Author): 王作铭;陈军;陈静;徐汉杰;

Email:

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