高原水库富营养水体浮游动物对汞的富集特征

发布时间：2018-06-01 21:01

本文选题：浮游动物 + 汞　；参考：《中国环境科学》2017年01期

【摘要】：以贵州省百花湖水库,红枫水库,阿哈水库、以及威宁典型湿地草海为研究对象,收集水库、湿地中大型的浮游动物,通过测定其总汞(THg)和甲基汞(MeHg)含量,并结合水体中相关水质参数,探讨高原喀斯特富营养化水库中浮游动物对汞及甲基汞的富集特征.结果表明:浮游动物体的THg和MeHg浓度变化范围分别为58.91-345.85ng/g及7.18-112.20ng/g,富营养化水平与浮游动物体THg含量存在明显的正相关性(P0.05),主要原因由于高喀斯特深水库,TP是限制水体富营化程度的关键因子,其间接影响浮游动物体对总汞的富集.在湿地环境,植被结构是影响浮游动物对汞污染物富集及分布差异明显的主要因子,其因是湿地水体植被结构对汞污染物迁移影响有明显差异.浮游动物对汞污染物富集有明显的季节差异,浮游动物对甲基汞富集特征是随着生物个体的体长,生物量的增加而增加.
[Abstract]:Taking Baihua Lake Reservoir, Hongfeng Reservoir, Aha Reservoir and typical Wetland Caohai of Weining as the research objects, the large zooplankton in reservoirs and wetlands were collected, and the contents of THG and MeHg were measured. The enrichment characteristics of mercury and methylmercury by zooplankton in karst eutrophication reservoir in plateau were discussed. The results show that the THg and MeHg concentrations of planktonic bodies vary from 58.91-345.85ng/g to 7.18-112.20ng / g, respectively. There is a significant positive correlation between eutrophication level and THg content of planktonic objects (P0.05N). The main reason is that TP is restricted in high karst reservoir. The key factors of the degree of enrichment, It indirectly affects the accumulation of total mercury by planktonic bodies. In wetland environment, vegetation structure is the main factor that affects the concentration and distribution of mercury pollutants in zooplankton. Phytoplankton has obvious seasonal differences in the concentration of mercury pollutants. The characteristic of zooplankton enrichment of methylmercury is that the biomass increases with the body length of organism.
【作者单位】：贵州大学喀斯特环境与地质灾害重点实验室;暨南大学生命科学技术学院;贵州师范大学;
【基金】：国家自然科学基金项目(41363007) 贵州省科学技术基金(20132296) 贵州大学喀斯特重点实验室开放基金项目(Karst-1604)
【分类号】：X524;X174

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