侯云;贾利兴;段舜山;

• 1:暨南大学水生生物研究中心

摘要(Abstract)：

为探究壬基酚(nonylphenol,NP)在水生生物中的富集传递效应,选择以蛋白核小球藻(Chlorella pyrenoidosa)和大型溞(Daphnia magna)为研究对象,开展蛋白核小球藻对NP的富集效应实验,及NP在蛋白核小球藻和大型溞体内的传递效应实验。研究结果表明,NP对蛋白核小球藻的96 h半数效应浓度(96 h-EC50)为3.13 mg·L~(-1),对蛋白核小球藻的生长和叶绿素含量的影响呈现明显的剂量-时间效应。NP对大型溞的48 h半数效应浓度(48 h-LC50)为37.41μg·L~(-1),属于高毒类化合物。蛋白核小球藻暴露于0.05 mg·L-1NP 4 h后,其生物富集系数(BCF)为5 144.93,富集量为252.2μg·g~(-1),在12 h内对NP的生物富集系数(BCF)最高达12 053.64,富集量为1 181.73μg·g~(-1)。以0.05 mg·L-1NP中暴露4 h后的蛋白核小球藻为饵料投喂大型溞7 d后,大型溞体内NP富集量最高达3.6μg·g~(-1)。0.05 mg·L~(-1)NP直接暴露组大型溞暴露10 d后,大型溞体内NP富集量最高达4.02μg·g~(-1)。蛋白核小球藻对NP具有较强的富集能力,能够通过摄食过程将NP传递到大型溞,经传递的NP能够显著抑制大型溞的生长、繁殖、摄食等生命活动。论文为评估NP在水生生态系统中的污染风险和富集传递效应提供了一定的参考依据。

关键词(KeyWords)： 壬基酚;蛋白核小球藻;大型溞;综合毒性;富集传递效应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(41176104,41476099);; 国家自然科学联合基金资助项目(U1133003)

作者(Author): 侯云;贾利兴;段舜山;

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