Evaluation on the biomagnification or biodilution of trace metals in global marine food webs by meta-analysis
Evaluation on the biomagnification or biodilution of trace metals in global marine food webs by meta-analysis
复制标题
通过荟萃分析评估全球海洋食物网中微量金属的生物放大或生物稀释
DOI：
10.1016/j.envpol.2019.113856
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发表时间：
2020
影响因子：
8.9
通讯作者：
Li Fei
中科院分区：
文献类型：
--
作者：
Sun Tao;Wu Huifeng;Wang Xiaoqing;Ji Chenglong;Shan Xiujuan;Li Fei
微量金属在海洋食物网中的传递和积累对海洋环境的结构和功能有着深远的影响。为了定量评估8种常见金属（As、Cd、Cr、Cu、Hg、Ni、Pb和Zn）在简化的5个营养级海洋食物网中的营养转移行为，采用荟萃分析方法对2000年至2019年发表的61项研究的9929个生物样品进行了重新汇编，涉及33个国家/地区的154个采样点。基于浓度-营养级加权线性回归和捕食者/被捕食者比较，分别计算了食物网放大因子（FWMF）和生物放大因子（BMF）。结果表明，As和Ni在全球海洋食物网中的营养转移行为不同，As和Ni随着营养级的增加而被有效稀释（FWMF < 1，p< 0.01），而Hg、Pb和Zn则随着营养级的增加而被有效稀释（FWMF> 1，p< 0.05）。而Cd、Cr和Cu没有表现出生物放大或生物稀释的趋势（p> 0.05）。各元素的FWMF值依次为：Hg（2.01）> Pb（1.81）> Zn（1.15）> Cu（1.13）> Cr（0.951）> Cd（0.850）> Ni（0.731）> As（0.494）。在特定的捕食-被捕食关系中，Pb从第三消费者（TC）到最高捕食者（BMF < 1，p< 0.05）表现出明显的生物稀释作用，而Cd和Cu从第一消费者（PC）到第二消费者（SC）表现出明显的生物放大作用（BMF>1，p< 0.05）。此外，当铜和锌从SC转移到TC，初级生产者转移到PC时，分别观察到明显的生物稀释和生物放大效应（p< 0.05）。进一步分析表明，发达国家五营养级海洋食物网中汞的平均浓度（0.904 mg kg−1dw）比发展中国家（0.549 mg kg − 1dw）更显著（p< 0.05）。
The transmission and accumulation of trace metals in marine food webs have a profound influence on the structure and function of marine environment. In order to quantitatively assess the trophic transfer behaviors of eight common metals (As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) in simplified five-trophic level marine food webs, a total of 9929 biological samples from 61 studies published between 2000 and 2019, involving 154 sampling sites of 33 countries/regions, were re-compiled using meta-analysis. Based on concentration-trophic level weighted linear regression and predator/prey comparison, the food web magnification factor (FWMF) and the biomagnification factor (BMF) were calculated, respectively. The results showed dissimilar trophic transfer behaviors of these metals in global marine food webs, in which As and Ni tended to be efficiently biodiluted with increasing trophic levels (FWMFs < 1,p< 0.01), while Hg, Pb and Zn trophically biomagnified (FWMFs > 1,p< 0.05). However, Cd, Cr and Cu presented no biomagnification or biodilution trend (p> 0.05). The values of FWMFs were ranked as: Hg (2.01) > Pb (1.81) > Zn (1.15) > Cu (1.13) > Cr (0.951) > Cd (0.850) > Ni (0.731) > As (0.494). In terms of specific predator-prey relationship, Pb showed significant biodilution from tertiary consumers (TC) to top predators (BMF < 1,p< 0.05), whereas Cd and Cu displayed obvious biomagnification from primary consumers (PC) to secondary consumers (SC) (BMFs >1,p< 0.05). Additionally, when Cu and Zn were transferred from SC to TC, and primary producers to PC, clear biodilution and biomagnification effects were observed, respectively (p< 0.05). Further analysis indicated that the average concentration of Hg in five-trophic level marine food webs of developed countries (0.904 mg kg−1dw) was more noticeable (p< 0.05) than that of developing countries (0.549 mg kg−1dw).