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Evidence of continued exposure to legacy persistent organic pollutants in threatened migratory common terns nesting in the Great Lakes.
Environment International ( IF 11.8 ) Pub Date : 2020-09-03 , DOI: 10.1016/j.envint.2020.106065
Steven C Travis 1 , Alicia Pérez-Fuentetaja 2 , Diana S Aga 1
Affiliation  

Persistent organic pollutants (POPs) accumulate in the food web of the Great Lakes ecosystem, causing concern that these chemicals play a role in the decline of avian species such as colonial-nesting waterbirds. In this study, samples from four life stages of the common tern (Sterna hirundo), a threatened species in New York State, were collected post-mortem in the Buffalo-Niagara region (United States). Brains (n = 26) and livers (n =27) were analyzed for polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and the insecticide p,p'-dichlorodiphenyltrichloroethane (DDT) and its two metabolites p,p'-dichlorodiphenyldichloroethylene (DDE) and p,p'-dichlorodiphenyldichloroethane (DDD). Detectable concentrations of PCBs and PBDEs were observed in all samples; concentrations of total PCBs ranged from 5.59 to 2,490 ng/g wet weight (ww), total PBDEs ranged from 1.09 to 494 ng/g ww, and DDE metabolites ranged from 0.56 to 637 ng/g ww. Analysis of the primary food source for terns in the Buffalo-Niagara region, emerald shiners (Notropis atherinoides), revealed that all three classes of POPs had similar contaminant profiles in the fish to those in the brains and livers of tern samples. Overall, small chicks contained greater concentrations of pollutants than medium chicks and juveniles, likely from maternal loading to eggs. These results underline the persistence of these legacy contaminants in the Great Lakes, despite their banning, and their biomagnification in threatened species through food web interactions.

中文翻译:

有证据表明,在大湖中筑巢的濒临灭绝的普通燕鸥继续暴露于传统的持久性有机污染物。

持久性有机污染物(POPs)累积在大湖地区生态系统的食物网中,引起人们的关注,这些化学物质在诸如殖民地筑巢的水鸟之类的鸟类物种减少中发挥了作用。在这项研究中,从布法罗-尼亚加拉地区(美国)的尸检中收集了纽约州濒危物种普通燕鸥(Sterna hirundo)四个生命阶段的样本。分析了大脑(n = 26)和肝脏(n = 27)中的多氯联苯(PCBs),多溴联苯醚(PBDEs),杀虫剂p,p'-二氯二苯基三氯乙烷(DDT)及其两种代谢物p,p'-二氯二苯基二氯乙烯(DDE)和对,p'-二氯二苯基二氯乙烷(DDD)。在所有样品中均观察到可检测的PCBs和PBDEs浓度。多氯联苯的总浓度范围为5.59至2 湿重为490 ng / g(ww),多溴二苯醚的总含量为1.09至494 ng / g ww,DDE代谢物的含量为0.56至637 ng / g ww。对布法罗-尼亚加拉大区燕鸥的主要食物来源,鲜绿色光泽(Notropis atherinoides)的分析表明,这三类持久性有机污染物在鱼类中的污染物特征与燕鸥样品的大脑和肝脏中相似。总体而言,小母鸡的污染物浓度要比中小母鸡和幼鱼高,这可能是由于母体负载到卵子造成的。这些结果强调了尽管被禁止,这些大的污染物仍在大湖地区持续存在,并且它们通过食物网相互作用在受威胁物种中具有生物放大作用。对布法罗-尼亚加拉地区燕鸥的主要食物来源,翡翠光泽(Notropis atherinoides)的分析表明,这三类持久性有机污染物在鱼类中的污染物特征与燕鸥样品的大脑和肝脏相似。总体而言,小母鸡的污染物浓度要比中小母鸡和幼鱼高,这可能是由于母体负载到卵子造成的。这些结果强调了尽管被禁止,这些大的污染物仍在大湖地区持续存在,并且它们通过食物网相互作用在受威胁物种中具有生物放大作用。对布法罗-尼亚加拉大区燕鸥的主要食物来源,鲜绿色光泽(Notropis atherinoides)的分析表明,这三类持久性有机污染物在鱼类中的污染物特征与燕鸥样品的大脑和肝脏中相似。总体而言,小母鸡的污染物浓度要比中小母鸡和幼鱼高,这可能是由于母体负载到卵子造成的。这些结果表明,尽管这些传统污染物被禁止,但仍在五大湖地区仍然存在,并且它们通过食物网相互作用在受威胁物种中具有生物放大作用。与中型雏鸡和幼鱼相比,小型雏鸡的污染物浓度更高,这可能是由于母体负载到卵子造成的。这些结果强调了尽管被禁止,这些大的污染物仍在大湖地区持续存在,并且它们通过食物网相互作用在受威胁物种中具有生物放大作用。与中型雏鸡和幼鱼相比,小型雏鸡的污染物浓度更高,这可能是由于母体负载到卵子造成的。这些结果强调了尽管被禁止,这些大的污染物仍在大湖地区持续存在,并且它们通过食物网相互作用在受威胁物种中具有生物放大作用。
更新日期:2020-09-03
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