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Characteristics of plankton Hg bioaccumulations based on a global data set and the implications for aquatic systems with aggravating nutrient imbalance

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Frontiers of Environmental Science & Engineering 2022年第3期16卷 121-133页

作者： Zhike Li Jie Chi Zhenyu Wu Yiyan Zhang Yiran Liu Lanlan Huang Yiren Lu Minhaz Uddin Wei Zhang Xuejun Wang Yan Lin Yindong Tong School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China School of Economics and Management China University of PetroleumBeijing 102249China School of Environment and Natural Resource Renmin University of ChinaBeijing 100872China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Norwegian Institute for Water Research Oslo 0349Norway

The bioaccumulation of mercury(Hg)in aquatic ecosystem poses a potential health risk to human being and aquatic *** by plankton represent a crucial process of Hg transfer from water to aquatic food ***,the current understanding of major factors affecting Hg accumulation by plankton is *** this study,a data set of 89 aquatic ecosystems worldwide,including inland water,nearshore water and open sea,was *** factors influencing plankton Hg bioaccumulation(i.e.,plankton species,cell sizes and biomasses)were *** results indicated that total Hg(THg)and methylmercury(MeHg)concentrations in plankton in inland waters were significantly higher than those in nearshore waters and open *** factors for the logarithm of THg and MeHg of phytoplankton were 2.4–6.0 and 2.6–6.7 L/kg,respectively,in all aquatic *** could be further biomagnified by a factor of 2.1–15.1 and 5.3–28.2 from phytoplankton to *** MeHg concentrations were observed with the increases of cell size for both phyto-and zooplankton.A contrasting trend was observed between the plankton biomasses and BAF_(MeHg),with a positive relationship for zooplankton and a negative relationship for *** physiologic traits impose constraints on the rates of nutrients and contaminants obtaining process from ***,many aquatic ecosystems are facing rapid shifts in nutrient *** suggested that these potential influences on the growth and composition of plankton should be incorporated in future aquatic Hg modeling and ecological risk assessments.

关键词： Plankton Hg bioaccumulation Physiological characteristics a cross-system analysis Nutrient compositions Global data set

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