张璐璐;刘静玲;张少伟;贺晟晨;郭春梅;曹瑞仙;

• 1:北京师范大学环境学院
• 2:水环境模拟国家重点实验室
• 3:濮阳水文水资源勘测局
• 4:北京绵世投资集团股份有限公司

摘要(Abstract)：

为了准确定量生态系统尺度下持久性有机污染物(POPs)的直接毒性效应和通过食物网传递的间接生态效应,建立POPs浓度与生态效应的量化关系,本研究以强人为干扰湖泊白洋淀为研究区,建立了湖泊底栖-浮游耦合食物网,运用AQUATOX模型评价典型POPs——多溴联苯醚(PBDEs)的水生态系统风险,判定关键浓度阈值。模型校正结果表明,该模型能够充分模拟白洋淀中18个优势种群生物量的季节变化过程;敏感性分析结果表明该模型对温度和呼吸速率参数敏感;风险评价的结果表明AQUATOX模型能够有效的评估PBDEs的直接毒性效应和间接生态效应,AQUATOX模型得到的最大无影响效应浓度(NOEC)要比实验室中的NOEC低1~2个数量级。因此,在自然生态系统中PBDEs的生态风险难以根据单一种群的毒性数据进行外推,而AQUATOX模型成为自然生态系统中PBDEs风险评价的可靠方法,能够判定在"可接受风险"水平时污染物的浓度阈值。AQUATOX模型为污染物环境基准的制定提供了较为可行的方法,进而为化学污染物的早期预警和风险管理提供决策依据。

关键词(KeyWords)： 多溴联苯醚(PBDEs);底栖-浮游耦合食物网;生态系统风险;AQUATOX模型;浓度阈值

Abstract:

Keywords:

基金项目(Foundation): 水体污染控制与治理专项项目,海河流域河流物理过程演变与环境流量保障技术与应用示范(2012ZX07203-006);; 中国博士后科学基金项目(2014M550647)

作者(Author): 张璐璐;刘静玲;张少伟;贺晟晨;郭春梅;曹瑞仙;

Email:

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