当前位置: X-MOL 学术Limnology › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Lake-wide assessment of microplastics in the surface waters of Lake Baikal, Siberia
Limnology ( IF 1.6 ) Pub Date : 2021-10-05 , DOI: 10.1007/s10201-021-00677-9
Marianne V. Moore 1 , Masumi Yamamuro 2 , Oleg A. Timoshkin 3 , Alena A. Shirokaya 3 , Yutaka Kameda 4
Affiliation  

Small microplastic particles < 330 µm, sometimes called mini-microplastics (MMP), are far more abundant than those larger than 330 µm. These smaller particles pose the greatest ecological risk to aquatic organisms, but have seldom been quantified in the surface waters of lakes or water bodies with long residence times where neutrally buoyant microplastics can accumulate. We quantified microplastics (MP) ranging in size from 20 µm to 5 mm in the surface waters (1 m depth) of the three basins of Lake Baikal, Siberia, which has a residence time of 377–400 years. Average lake-wide MP concentration equaled 291 ± 252 m−3, with MMP comprising 88% of total MP abundance. Our average MP concentration was 100–1000 × greater than those reported previously for L. Baikal, most likely because our methods allowed the quantification of MMP. Highest MP concentration in L. Baikal occurred in Maloe More Strait where tourism is most concentrated. MP fragments (in contrast to fibers) and the plastic polymer, polypropylene, were numerically dominant in L. Baikal, suggesting that the major source of MP is fragmentation of plastic debris. A review of the literature and our results revealed that residence time is an inadequate predictor of MP concentration in lakes, and that MP contamination has likely been vastly underestimated in many N. American and European lakes. Investment in solid waste and wastewater management infrastructure as well as the enforcement of anti-pollution laws are urgently needed to reduce plastics entering L. Baikal.



中文翻译:

西伯利亚贝加尔湖地表水中微塑料的全湖评估

< 330 µm 的小微塑​​料颗粒,有时也称为微型微塑料 (MMP),比大于 330 µm 的颗粒要丰富得多。这些较小的颗粒对水生生物构成最大的生态风险,但很少在湖泊或水体的地表水中进行量化,这些水体的停留时间长,中性浮力微塑料可以在这些地方积聚。我们量化了西伯利亚贝加尔湖三个盆地的地表水(1 m 深)中大小从 20 µm 到 5 mm 的微塑料 (MP),其停留时间为 377-400 年。全湖平均 MP 浓度等于 291 ± 252 m -3, MMP 占总 MP 丰度的 88%。我们的平均 MP 浓度比之前报道的贝加尔湖的平均浓度高 100-1000 倍,这很可能是因为我们的方法允许对 MMP 进行量化。贝加尔湖的 MP 浓度最高出现在旅游业最集中的马洛莫尔海峡。MP 碎片(与纤维相反)和塑料聚合物聚丙烯在贝加尔湖的数量上占主导地位,这表明 MP 的主要来源是塑料碎片的碎片。对文献和我们的结果的回顾表明,停留时间不能充分预测湖泊中 MP 浓度,而且许多北美和欧洲湖泊中 MP 污染可能被大大低估了。

更新日期:2021-10-06
down
wechat
bug