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Climate Influence on Legacy Organochlorine Pollutants in Arctic Seabirds

机译：气候对北极海鸟遗留有机氯污染物的影响

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Changing climate can influence the transport of chemical pollutants into Arctic regions and their fate once there. However, the influence of weather or climate variables on organochlorine accumulation in Arctic wildlife, including seabirds, and associated time scale are poorly understood. We assessed the interannual relationships between a suite of weather/climate variables for time lags of 0 to 10 yr and organochlorine pollutant concentrations spanning 1975-2014 in eggs of two seabird species (northern fulmar Fulmarus glacialis, thick-billed murre Uria lomvia) that breed in the Canadian High Arctic. The majority of variability in the data was associated with declining organochlorine emissions (up to 70.2% for murres and 77.4% for fulmars). By controlling for emissions using principal component ordination and general linear modeling, correlations with the North Atlantic Oscillation (NAO) were found for fulmars and with rainfall for murres, after a time lag of 4-9 yr between weather/climate conditions and egg collection. Our results suggest that with increasingly NAO+ conditions and increasing rainfall associated with climate change, concentrations of certain organochlorines such as hexachlorobenzene and p,p'-DDE have increased, dependent on seabird species and ecology as well as partitioning characteristics of the chemical. Analysis of a truncated version of the data sets (2005-2014), consistent with typical time series lengths for environmental pollutants in Arctic wildlife, found correlations with precipitation for murres but not with NAO for fulmars, suggesting that longer time series better elucidate relationships with broad-scale climate indices. Organochlorine pollutant data sets spanning 40 years, which is rare for Arctic wildlife, for two species of seabird were assessed, and the results highlight the association between weather/climate and pollutant accumulation in Arctic food webs and the critical role of ongoing monitoring to effectively elucidate these relationships.
机译：气候变化会影响化学污染物向北极地区的运输以及它们在那里的命运。但是，人们对气候或气候变量对北极野生生物（包括海鸟）中有机氯积累的影响以及相关的时间尺度了解得很少。我们评估了繁殖的两种海鸟（北黄mar Fulmarus glacialis，厚嘴鼠re Uria lomvia）的卵中的一系列时间/气候变量（对于0至10年的时滞）与1975-2014年的有机氯污染物浓度之间的年际关系。在加拿大高北极地区。数据中的大部分可变性与有机氯排放量的下降有关（海藻高达70.2％，为77.4％）。通过使用主成分排序和通用线性建模控制排放，在天气/气候条件与采集鸡蛋之间的时间间隔为4-9年之后，发现与北大西洋涛动（NAO）的涡流和降雨与黑鼠的相关性。我们的结果表明，随着NAO +条件的增加和与气候变化相关的降雨的增加，某些有机氯（如六氯苯和p，p'-DDE）的浓度增加，这取决于海鸟的种类和生态以及该化学品的分配特征。对数据集的截短版本（2005-2014年）进行分析后发现，与北极野生动植物中环境污染物的典型时间序列长度一致，它发现了与murre降水的相关性，而与fulmars没有与NAO的相关性，这表明较长的时间序列可以更好地阐明与广泛的气候指数。评估了40年的有机氯污染物数据集，这是北极野生动物所罕见的两种海鸟物种，评估结果突显了天气/气候与北极食物网中污染物积累之间的关联以及持续监测以有效阐明的关键作用这些关系。

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  • 来源
    《Environmental Science & Technology》 |2019年第5期|2518-2528|共11页
  • 作者

    Foster Karen L.; Braune Birgit M.; Gaston Anthony J.; Mallory Mark L.;

  • 作者单位

    Karen Foster Environm Res, Peterborough, ON K9J 8L2, Canada|Trent Univ, Applicat Modelling & Quantitat Methods AMOD, Peterborough, ON K9L 0G2, Canada;

    Carleton Univ, Environm & Climate Change Canada, Natl Wildlife Res Ctr, Ottawa, ON K1A 0H3, Canada;

    Carleton Univ, Environm & Climate Change Canada, Natl Wildlife Res Ctr, Ottawa, ON K1A 0H3, Canada;

    Acadia Univ, Dept Biol, Wolfville, NS B4P 2R6, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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