Effects of climate change on bioaccumulation and biomagnification of polycyclic aromatic hydrocarbons in the planktonic food web of a subtropical shallow eutrophic lake in China
Effects of climate change on bioaccumulation and biomagnification of polycyclic aromatic hydrocarbons in the planktonic food web of a subtropical shallow eutrophic lake in China
复制标题
气候变化对我国亚热带浅层富营养化湖泊浮游食物网中多环芳烃生物累积和生物放大的影响
DOI：
10.1016/j.envpol.2017.01.068
复制
发表时间：
2017
影响因子：
8.9
通讯作者：
Zhen Wang
中科院分区：
文献类型：
--
作者：
Yuqiang Tao;Bin Xue;Guoliang Lei;Fei Liu;Zhen Wang
迄今为止，气候变化对水生食物网中化学污染物的生物累积和生物放大作用的影响很少得到研究。由于全球变暖，浮游生物的补充已经提前。全球变暖和降水模式预计将发生季节性变化。气候变化引起的浮游生物物候变化是否以及如何影响化学污染物的生物累积和生物放大作用，以及它们将如何应对气候变化，在很大程度上尚不清楚。在这里，我们结合联合收割机的数据分析，在过去的70年，高时间分辨率监测和模型开发，以检验这一假设与9个多环芳烃（PAHs）在亚热带浅水富营养化湖泊的水生食物网在中国。我们发现的生物富集因子和生物累积因子的多环芳烃和平均温度，这取决于蓝藻，桡足类和枝角类的招聘温度之间的双相相关性。由于浮游生物物候的变化，到2050-2060年，将在不到13-18天的时间内观察到生物浓缩系数、生物累积系数和平均温度之间的正相关关系。多环芳烃及其生物累积和生物放大作用对气候变化的响应具有季节性和差异性。随着全球气候变暖，大部分多环芳烃的生物累积量会减少，冬季和春季的减少率较高。从浮游植物到浮游动物，大多数多环芳烃的生物放大作用将随着全球变暖而增加，冬季和春季的增加率较高。我们的研究为气候变化情景下富营养化沃茨中化学污染物的生物累积和生物放大提供了新的见解。
To date effects of climate change on bioaccumulation and biomagnification of chemical pollutants in planktonic food webs have rarely been studied. Recruitments of plankton have shifted earlier due to global warming. Global warming and precipitation patterns are projected to shift seasonally. Whether and how the shifts in plankton phenology induced by climate change will impact bioaccumulation and biomagnification of chemical pollutants, and how they will respond to climate change are largely unknown. Here, we combine data analysis of the past seven decades, high temporal resolution monitoring and model development to test this hypothesis with nine polycyclic aromatic hydrocarbons (PAHs) in the planktonic food web of a subtropical shallow eutrophic lake in China. We find biphasic correlations between both bioconcentration factors and bioaccumulation factors of the PAHs and the mean temperature, which depend on the recruitment temperatures of cyanobacteria, and copepods and cladocerans. The positive correlations between bioconcentration factors, bioaccumulation factors and the mean temperature will be observed less than approximately 13–18 days by 2050–2060 due to the shifts in plankton phenology. The PAHs and their bioaccumulation and biomagnification will respond seasonally and differently to climate change. Bioaccumulation of most of the PAHs will decrease with global warming, with higher decreasing rates appearing in winter and spring. Biomagnification of most of the PAHs from phytoplankton to zooplankton will increase with global warming, with higher increasing rates appearing in winter and spring. Our study provides novel insights into bioaccumulation and biomagnification of chemical pollutants in eutrophic waters under climate change scenarios.