Persistent Organic Pollutants Burden, Trophic Magnification and Risk in a Pelagic Food Web from Coastal NW Mediterranean Sea
Persistent Organic Pollutants Burden, Trophic Magnification and Risk in a Pelagic Food Web from Coastal NW Mediterranean Sea
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DOI：
10.1021/acs.est.1c00904
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发表时间：
2021-03-22
影响因子：
11.4
通讯作者：
Sempere, Richard
中科院分区：
文献类型：
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作者：
Castro-Jimenez, Javier;Banaru, Daniela;Sempere, Richard
在地中海西北部受影响地区的一个特征明确的中上层食物网（包括浮游植物、浮游动物、六种鱼类和两种头足类动物）中，对 62 种持久性有机污染物的储存能力、营养放大率和风险进行了评估。我们的结果表明，浮游隔室储存多溴二苯醚（PBDE）和多氯二苯并-对-二恶英和二苯并呋喃（PCDD / F）的能力很高，与他们估计的低营养放大系数（TMF）0.2-2.0（PBDE）和0.3-1.1（PCDD / F）一致。 Sigma PBDE 在 200-1000 μ m 大小的浮游动物中占主导地位（类似于 330 ng g(-1) lw，中值），而 Sigma PCDD/F 在 0.7-200 μ m 大小的浮游植物中优先积累（875 pg g(-1)，中值）。相比之下，多氯联苯 (PCB) 优先在较高营养级（六种鱼类和两种头足类动物）中生物富集，TMF = 0.8-3.9，大西洋鲣鱼 (Sarda sarda) 和鲭鱼 (Scomber colias) 的中值浓度分别达到 4270 ng g(-1) lw (PCB) 和 3140 ng g(-1) lw (PCB)。对于这些可食用物种，根据国家消费标准估算的人类每周二恶英类持久性有机污染物摄入量超过了欧盟的每周容许摄入量。此外，沙达沙门氏菌中非二恶英类多氯联苯的浓度高于欧盟食品中的最高水平，表明存在风险。由于食用了所研究的所有其他可食用物种，没有发现任何风险证据，也没有发现多溴二苯醚的风险证据。食物链中持久性有机污染物的综合负担达到约18μg g(-1)，代表研究区域有毒有机化学品的动态库存。我们表明，特征化的食物网可以成为研究区域化学污染状况的有用且全面的“生物指标”，为地中海沿岸水域有毒化学物质的监测开辟新的视角。
The storage capacity, trophic magnification and risk of sixty-two POPs have been evaluated in a well-characterized pelagic food web (including phytoplankton, zooplankton, six fish, and two cephalopods species) from an impacted area in NW Mediterranean Sea. Our results show the high capacity of the planktonic compartment for the storage of polybrominated diphenyl ethers (PBDEs) and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), consistent with their estimated low trophic magnification factors (TMF) of 0.2-2.0 (PBDEs) and of 0.3-1.1 (PCDD/Fs). Sigma PBDEs dominated in the zooplankton size-class 200-1000 mu m (similar to 330 ng g(-1) lw, median), whereas Sigma PCDD/Fs accumulated preferentially in phytoplankton size-class 0.7-200 mu m (875 pg g(-1), median). In contrast, polychlorinated biphenyls (PCBs) were preferentially bioaccumulated in the higher trophic levels (six fish species and two cephalopods) with TMFs = 0.8-3.9, reaching median concentrations of 4270 and 3140 ng g(-1) lw (PCBs) in Atlantic bonito (Sarda sarda) and chub mackerel (Scomber colias), respectively. For these edible species, the estimated weekly intakes of dioxin-like POPs for humans based on national consumption standards overpassed the EU tolerable weekly intake. Moreover, the concentrations of nondioxin-like PCBs in S. sarda were above the EU maximum levels in foodstuffs, pointing to a risk. No risk evidence was found due to consumption of all other edible species studied, neither for PBDEs. The integrated burden of POPs in the food web reached similar to 18 mu g g(-1) representing a dynamic stock of toxic organic chemicals in the study area. We show that the characterized food web could be a useful and comprehensive "bioindicator" of the chemical pollution status of the study area, opening new perspectives for the monitoring of toxic chemicals in Mediterranean coastal waters.