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Methylmercury in Marine Ecosystems: Spatial Patterns and Processes of Production Bioaccumulation and Biomagnification

机译:海洋生态系统中的甲基汞:生产生物蓄积和生物放大作用的空间格局和过程

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摘要

The spatial variation of MeHg production, bioaccumulation and biomagnification in marine food webs is poorly characterized but critical to understanding the links between sources and higher trophic levels such as fish that are ultimately vectors of human and wildlife exposure. This paper discusses both large and local scale processes controlling Hg supply, methylation, bioaccumulation and transfer in marine ecosystems. While global estimates of Hg supply suggest important open ocean reservoirs of MeHg, only coastal processes and food webs are known sources of MeHg production, bioaccumulation, and bioadvection. The patterns observed to date suggest that not all sources and biotic receptors are spatially linked and that physical and ecological processes are important in transferring MeHg from source regions to bioaccumulation in marine food webs and from lower to higher trophic levels.
机译:海洋食物网中甲基汞的产生,生物蓄积和生物放大作用的空间变化特征不清,但对于理解源与较高营养水平(如鱼类,最终成为人类和野生生物接触的媒介)之间的联系至关重要。本文讨论了控制海洋生态系统中汞供应,甲基化,生物积累和转移的大规模和地方性过程。尽管全球对汞供应的估计表明重要的开放性海洋甲基汞储量,但只有沿海过程和食物网是甲基汞生产,生物富集和生物平流的已知来源。迄今为止观察到的模式表明,并非所有来源和生物受体在空间上都是联系在一起的,物理和生态过程对于将甲基汞从来源区域转移到海洋食物网中的生物积累以及从较低营养级到较高营养级都很重要。

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