南极海鸟中的暴露:评估热带位置和迁徙模式的影响
J A G Padilha1, J Souza-Kasprzyk2, M Pinzoni3
1Radioisotope Laboratory, Biophysics Institute, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil; CBMA - Centre for Molecular and Environmental Biology/ARNET-Aquatic Research Network & IB-S, Institute of Science and Innovation for Bio-Sustainability, Department of Biology, University of Minho, Campus Gualtar, 4710-057, Braga, Portugal; IB-S, Institute of Science and Innovation for Bio-Sustainability, Department of Biology, University of Minho, Campus Gualtar, 4710-057, Braga, Portugal.
Chemosphere
|August 23, 2023
概括
在南极洲,人为 (Hg) 污染正在增加. 这项研究发现,海鸟的营养位置,而不是迁徙,显著影响了其水平,突出了对多种物种监测的需要.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 毒理学 毒理学 毒理学
背景情况:
- 由于人类活动,南极环境中的 (Hg) 输入正在增加.
- 南极生态系统中含量的增加引起了对野生动物的担忧.
- 海鸟是极地地区环境污染的重要指标.
研究的目的:
- 为了研究南极海鸟的总 (THg) 度.
- 确定影响居民和迁徙海鸟暴露的因素.
- 评估热带位置和迁移在生物积累中的作用.
主要方法:
- 收集了八种南极海鸟种的羽毛和蛋.
- 在采集的样本中测量了总 (THg) 度.
- 利用稳定同位素数据 (δ15N, δ13C, δ34S) 来评估食物位和食习惯.
主要成果:
- 在所有物种中,THg度在羽毛中高于在蛋中.
- 像南方巨和南极斯库亚等高热带水平的海鸟显示THg水平升高.
- 在δ15N值 (位) 和THg度之间观察到显著的正相关性.
结论:
- 热带位置是南极海鸟中生物积累的关键决定因素.
- 迁移模式没有显著影响研究物种的暴露.
- 采用多种方法对于了解南极生态系统中污染影响至关重要.
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