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首页> 外文期刊>Environmental toxicology and chemistry >Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters
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Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters

机译：来自加拿大北极的戒指密封件（Pusa Hispida）关于时间和气候参数

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Mercury is found in Arctic marine mammals found in Arctic marine mammals that are important in the diet of northern Indigenous peoples. The objectives of the present long-term study, spanning a 45-yr period, were to 1) investigate the temporal trends of total mercury (THg; muscle and liver) and selenium (Se; liver) in ringed seals (Pusa hispida) from different regions of the Canadian Arctic; and 2) examine possible relationships with age, diet, and climate parameters such as air temperature, precipitation, climatic indices, and ice-coverage. Ringed seals were collected by hunters in northern communities in the Beaufort Sea, Central Arctic, Eastern Baffin Island, Hudson Bay, and Ungava/Nunatsiavut regions (Canada) between 1972 and 2017. Mercury levels did not change through time in seal liver, but THg levels in muscle decreased in seals from Hudson Bay (-0.91%/yr) and Ungava/Nunatsiavut (-1.30%/yr). The THg concentrations in seal tissues increased significantly with seal trophic level, inferred from nitrogen stable isotopes. Carbon stable isotope values in seal muscle decreased significantly through time at all sites. Selenium-to-THg ratios were found to be 1 for all years and regions. Variation partitioning analyses across regions indicated that THg trends in seals were mostly explained by age (7.3-21.7%), climate parameters (3.5-12.5%), and diet (up to 9%); climate indices (i.e., Arctic and North Atlantic Oscillations, Pacific/North American pattern) explained the majority of the climate portion. The THg levels had a positive relationship with Arctic Oscillation for multiple regions. Associations of THg with air temperature, total precipitation, and sea-ice coverage, as well as with North Atlantic Oscillation and Pacific/North American pattern were found to vary with tissue type and geographical area.Environ Toxicol Chem2020;00:1-13. (c) Her Majesty the Queen in Right of Canada 2020. Reproduced with the permission of the Minister of Environment and Climate Change Canada.
机译：在北极海洋哺乳动物发现的北极海洋哺乳动物中发现了汞，这在北部土着人民的饮食中很重要。目前长期研究的目标，跨越45年的时间为1）调查戒指密封（Pusa Hispida）中总汞（THG;肌肉和肝脏）和硒（SE;肝脏）的时间趋势加拿大北极的不同地区; 2）与年龄，饮食和气候参数等可能的关系，例如空气温度，降水，气候指数和冰覆盖。由北部北部北部，中部北极，东壁岛，哈德森湾和1972年至2017年之间的Ungava / Nunatsiavut地区（加拿大）收集戒指。汞水平没有通过密封肝脏的时间改变，而是THG Hudson Bay（-0.91％/ Yr）和Ungava / Nunatsiavut（-1.30％/ YR）的密封件中的肌肉中的水平降低。密封组织中的THG浓度显着增加了密封营养水平，从氮气稳定同位素推断出来。密封肌中的碳稳定同位素值在所有地点的时间内明显减少。发现硒与THG比率为> 1持续份数和地区。各地区的变异分区分析表明密封率的趋势主要由年龄（7.3-21.7％），气候参数（3.5-12.5％）和饮食（高达9％）;气候指数（即北极和北大西洋振荡，太平洋/北美模式）解释了大多数气候部分。 THG水平与多个地区的北极振荡有正面关系。发现THG与空气温度，总降水和海冰覆盖以及北大西洋振荡和太平洋/北美模式的关联，而玉米型和地理区域。紫罗兰毒素Chem2020202020202020202020202020; 00：1-13。 （c）陛下2020年加拿大右边的女王。根据加拿大环境和气候变化的许可复制。

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