生态和环境特征影响沿海无脊椎动物中的甲基生物积累
Molly A Bradford1, Mark L Mallory2, Nelson J O'Driscoll1
1Earth and Environmental Science Department, Acadia University, Wolfville, Nova Scotia, Canada.
Chemosphere
|October 22, 2023
概括
沿海无脊椎动物中的 (Hg) 生物积累对食物网的健康至关重要. 孔水甲基和沉积物中的硫同位素强烈预测无脊椎动物的Hg水平,Corophium电流器作为一个有价值的生物指标.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 海洋生物学 海洋生物学
背景情况:
- 沿海无脊椎动物中的 (Hg) 生物积累对于评估食物网风险至关重要.
- 影响生物积累的因素包括当地的Hg度,地化学,养习惯和食位置.
研究的目的:
- 量化无脊椎动物中的 (Hg) 度,并评估环境化学对Hg生物积累的影响.
- 确定沿海无脊椎动物中Hg度的主要环境预测因素.
主要方法:
- 从Minas盆地,Fundy湾的五个沿海地点采集七种无脊椎动物物种的样本.
- 对甲基 (MeHg),总 (THg) 和稳定同位素 (δ15N, δ13C) 的无脊椎动物组织的分析.
- 对Hg物种,有机碳,硫化合物和稳定的同位素 (δ34S) 的沉积物和孔水的分析.
主要成果:
- 在无脊椎动物中,MeHg的平均度为10.03 ± 7.04 ng g-1.
- 孔水MeHg是无脊椎动物MeHg度的最强预测因素.
- 沉积物 δ34S 是一个显著的预测因素,而组织 δ34S 在几个物种中与MeHg正相关,改善了Hg预测模型.
结论:
- 孔水MeHg和沉积物地化学,特别是δ34S,是沿海无脊椎动物中Hg生物积累的关键驱动因素.
- 两足动物Corophium volutator在环境因素的基础上显示出Hg水平的高可预测性,标记它为Fundy湾沉积物的有用生物指标.
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