在北极海鸟中-的空间分布
Marta Cruz-Flores1, Jérémy Lemaire2, Maud Brault-Favrou1
1Littoral, Environnement et Sociétés (LIENSs), UMR 7266 CNRS - La Rochelle Université, 2 Rue Olympe de Gouges, 17000 La Rochelle, France.
Environmental pollution (Barking, Essex : 1987)
|December 12, 2023
概括
(Se) 保护北极海鸟免受 (Hg) 毒性的影响. 研究表明,布鲁尼希的Hg和Se水平各不相同.
科学领域:
- 环境毒理学环境毒理学
- 海洋生态海洋生态学
- 生物地质化学生物地质化学
背景情况:
- (Hg) 是一种有毒的元素,在海鸟中已知空间梯度,构成区域风险.
- (Se) 减轻了Hg的毒性,但其分布和海鸟暴露中的作用不太清楚.
- 了解Hg和Se的同时暴露对于评估海洋生态系统中毒性风险至关重要.
研究的目的:
- 研究北极和亚北极海鸟中Hg和Se的空间共同暴露.
- 评估Se与Hg (Se:Hg) 的摩尔比率,作为Hg暴露风险的指标.
- 为了比较两个海鸟物种和海洋盆地之间的Hg和Se水平,并评估热带影响.
主要方法:
- 在17个殖民地 (2015-2017年) 收集了布鲁尼希的和黑腿猫头的血液样本.
- 测量了Hg和Se度,并计算了Se:Hg摩尔比率.
- 利用稳定的和碳同位素来评估热带生态对微量元素水平的影响.
主要成果:
- 在大西洋-北极地区的鱼中观察到一个西向东的降低Hg和Se的梯度.
- 基蒂瓦克在大西洋和北极地区呈现出西向东倾斜的海量增加,这表明欧洲北极地区的保护更好.
- 比起 kittiwakes,guillemots的Se度和Se:Hg比率较低,这表明guillemots的Hg毒性风险更高.
结论:
- 在海鸟种类之间,Se水平和Se:Hg比率有很大差异,影响Hg毒性风险.
- 在Hg和Se梯度的区域差异表明物种对环境变异的特定反应.
- 综合监测Se和Hg对于评估Hg在海洋捕食者的毒性至关重要.
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