太平洋中的化和化阻燃剂:来自稳定同位素和脂肪酸的来源和饮食见解
Robert Kesic1, John E Elliott2, Sandi L Lee1
1Environment and Climate Change Canada, Wildlife Research Division, Delta, British Columbia, Canada, V4K 3N2.
Environmental research
|July 9, 2025
概括
在不列颠哥伦比亚省,白头的阻燃剂水平因饮食和息地而异. 虽然检测到聚二乙烯 (PBDE),但度仍低于幼的有害值.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 野生动物生态生态学
背景情况:
- 持久,生物积累和有毒的阻燃剂对顶级捕食者构成风险.
- 了解白头中聚二乙烯 (PBDE) 和替代化阻燃剂 (AHFR) 的暴露途径至关重要.
研究的目的:
- 调查白头幼中PBDE和AHFR的饮食暴露途径和空间变异.
- 为了将污染物水平与息地梯度 (海洋,淡水,陆地) 和饮食成分相关联.
主要方法:
- 在不列颠哥伦比亚省 (2021-2023) 收集了91只白头幼的血液样本.
- 分析了15个PBDE,7个AHFR,稳定同位素 (δ13C, δ34S, δ15N) 和脂肪酸甲基 (FAMEs) 的血.
- 使用FAME分析来区分水生动物和陆生动物的饮食贡献.
主要成果:
- 观察到一个明显的空间饮食梯度,海岸的海洋饮食和内陆的陆地/淡水饮食,由同位素和FAME证实.
- 在北萨利什海 (North Salish Sea) 发现了高聚乙烯 (PBDE) 度,这与特定地点和饮食因素有关 (δ15N,Omega3:6).
- 检测到低水平的替代化阻燃剂 (AHFR),表明暴露程度有限.
结论:
- 饮食模式显著影响不同息地光的聚二乙烯 (PBDE) 暴露.
- 尽管检测到污染物,但幼中的多二乙烯 (PBDE) 度低于已知会导致不良健康影响的水平.
- 这项研究开创了稳定同位素和脂肪酸的综合使用,以评估顶级捕食者的污染物暴露.
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