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来自中国博海湾的迁徙水鸟中的持久性,生物积累性和有毒污染物:对不同污染源的影响

Xingpei Cao¹, Yang Wu², Furong Bai²

¹State Key Laboratory of Advanced Environmental Technology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.

The Science of the total environment

|February 13, 2025

概括

波海湾的候鸟积累了和PCB等污染物,主要来自繁殖场. DDTs源于冬季息地,影响鸟类在整个年度周期中的健康.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
鸟类学鸟类学是一门学科.

背景情况:

博海湾是东亚-澳大利亚亚洲航道 (EAAF) 上迁徙鸟类的关键停留点.
了解迁徙物种的污染物暴露对于保护至关重要.

研究的目的:

确定波海湾迁徙水鸟和当地水生生物的稳定同位素特征和污染物水平 (Hg,PCB,DDT,SCCP).
调查梨花在一年生命周期中的污染暴露源.
评估污染物对蛋厚度的潜在影响.

主要方法:

收集了小,大和黑翼的蛋,以及来自南浦和东湿地的当地水生生物.
对稳定同位素 (C,N,D) 和 (Hg) 度,多化双 (PCB),二二三乙烯 (DDT) 和短链化 (SCCP) 的分析.
同位素值与污染物度之间的相关性分析,以及基于迁移路线的污染源评估.

主要成果:

南浦和东湿地之间的dD值存在显著差异,与盐度有关.
地点内的特定物种污染概况,但湿地之间没有相同物种的空间差异.
在δ¹⁵N和Hg/PCB之间的正相关性,表明共享或相关的来源.
梨蛋中的Hg和PCB很可能来自博海湾 (繁殖地点),而DDT则来自长江 (冬季地点).

结论:

污染物的积累因物种和位置而异,受迁移模式的影响.
在整个年度周期中暴露于污染对迁徙鸟类的风险评估至关重要.
污染物可能会对蛋厚度产生负面影响,这凸显了跨飞行路的保护工作的必要性.

关键词:

暴露于风险中的风险.迁徙的水鸟迁徙的水鸟污染物 PBT 的污染物.污染源污染源污染源

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