在移徙陆地鸟类物种中甲基暴露的变化:影响因素,生物放大和潜在风险
Lingling Xing1, Tong Zhang1, Xuetao Han2
1College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong, China.
The Science of the total environment
|October 15, 2023
概括
迁徙鸟类的羽毛揭示了中国陆地生态系统中甲基 (MeHg) 的污染. 鸟和歌鸟种类的MeHg水平较高,表明生物放大风险.
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:
- 中国是主要的 (Hg) 排放国,但陆地甲基 (MeHg) 监测很少.
- 了解陆地食物网中MeHg的积累对于生态风险评估至关重要.
研究的目的:
- 评估来自西伯利亚和中国东北部的迁徙陆地鸟类中MeHg的发生和积累.
- 评估使用鸟羽作为陆地Hg污染的生物指标的潜力.
主要方法:
- 分析了12种迁徙鸟类的身体羽毛中的MeHg度.
- 使用稳定同位素分析 (δ15N) 评估食习惯和热带位置.
- 跨物种,年龄组和饮食协会的MeHg水平的比较.
主要成果:
- 观察到MeHg水平的显著变化,虫和食昆虫的歌鸟显示出更高的度 (0.62-1.20 mg/kg).
- 在陆地食物网中,MeHg和δ15N之间的正相关性证实了生物放大.
- 成年鸟的MeHg水平高于幼,食草的子的MeHg水平最低.
结论:
- 迁徙鸟类的羽毛是监测陆地Hg污染的有效生物指标.
- 某些鸟类,特别是鸟,面临着来自MeHg暴露的潜在风险.
- 需要进一步的研究才能充分理解中国陆地环境中的MeHg动态.
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