Microplastics distribution in the Eurasian Arctic is affected by Atlantic waters and Siberian rivers
Microplastics distribution in the Eurasian Arctic is affected by Atlantic waters and Siberian rivers
复制标题
欧亚北极地区的微塑料分布受到大西洋水域和西伯利亚河流的影响
DOI：
--
复制
发表时间：
2021
影响因子：
7.9
通讯作者：
I. Semiletov
中科院分区：
文献类型：
--
作者：
E. Yakushev;A. Gebruk;A. Osadchiev;S. Pakhomova;A. Lusher;A. Berezina;B. van Bavel;Elena Vorozheikina;D. Chernykh;G. Kolbasova;I. Razgon;I. Semiletov
塑料污染被全球公认为对海洋生态系统、栖息地和野生动物的威胁，现在它已经到达了北冰洋等偏远地区。尽管如此，欧亚北极地区微塑料的分布情况尤其少报。在这里，我们对60个来自欧亚北极的地下泵水样本和48个地表Neuston网样本进行了分析，目的是根据海洋条件对微塑料进行量化和分类。在我们的研究区，我们在地表样本中平均每立方米发现0.004件微塑料，在地下样本中平均每立方米发现0.8件微塑料。大西洋地表水、极地地表水和西伯利亚大河排放的羽流之间的微塑性特征有很大不同，因此可以识别两种微塑料污染源(p <； 0.05表面积、形态和聚合物类型)。在大西洋来源的地表水中观察到的微塑料的重量浓度最高。西伯利亚的河流流量被确定为第二大污染源。我们的结论是，这些水团控制着欧亚北极地区微塑料的分布。微塑料特性(即丰度、聚合物类型、大小、重量浓度)可用于识别水团。根据对地表水和地下水样的分析，微塑料在欧亚北极的分布受到西伯利亚河流和大西洋贡献的控制。
Plastic pollution is globally recognised as a threat to marine ecosystems, habitats, and wildlife, and it has now reached remote locations such as the Arctic Ocean. Nevertheless, the distribution of microplastics in the Eurasian Arctic is particularly underreported. Here we present analyses of 60 subsurface pump water samples and 48 surface neuston net samples from the Eurasian Arctic with the goal to quantify and classify microplastics in relation to oceanographic conditions. In our study area, we found on average 0.004 items of microplastics per m3 in the surface samples, and 0.8 items per m3 in the subsurface samples. Microplastic characteristics differ significantly between Atlantic surface water, Polar surface water and discharge plumes of the Great Siberian Rivers, allowing identification of two sources of microplastic pollution (p < 0.05 for surface area, morphology, and polymer types). The highest weight concentration of microplastics was observed within surface waters of Atlantic origin. Siberian river discharge was identified as the second largest source. We conclude that these water masses govern the distribution of microplastics in the Eurasian Arctic. The microplastics properties (i.e. abundance, polymer type, size, weight concentrations) can be used for identification of the water masses. The distribution of microplastics in the Eurasian Arctic is controlled by contributions from the Siberian rivers as well as the Atlantic, according to analyses of surface and subsurface water samples.