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DOI | 10.1126/science.aba5899 |
Seafloor microplastic hotspots controlled by deep-sea circulation | |
Ian A. Kane; Michael A. Clare; Elda Miramontes; Roy Wogelius; James J. Rothwell; Pierre Garreau; Florian Pohl | |
2020-06-05 | |
发表期刊 | Science |
出版年 | 2020 |
英文摘要 | What controls the distribution of microplastics on the deep seafloor? Kane et al. show that the answer to that question is more complicated than particles simply settling from where they are found on the sea surface (see the Perspective by Mohrig). Using data that they collected off the coast of Corsica, the authors show that thermohaline-driven currents can control the distribution of microplastics by creating hotspots of accumulation, analogous to their role in causing focused areas of seafloor sediment deposition. Such currents also supply oxygen and nutrients to deep-sea benthos, so deepsea biodiversity hotspots are also likely to be microplastic hotspots. Science , this issue p. [1140][1]; see also p. [1055][2] Although microplastics are known to pervade the global seafloor, the processes that control their dispersal and concentration in the deep sea remain largely unknown. Here, we show that thermohaline-driven currents, which build extensive seafloor sediment accumulations, can control the distribution of microplastics and create hotspots with the highest concentrations reported for any seafloor setting (190 pieces per 50 grams). Previous studies propose that microplastics are transported to the seafloor by vertical settling from surface accumulations; here, we demonstrate that the spatial distribution and ultimate fate of microplastics are strongly controlled by near-bed thermohaline currents (bottom currents). These currents are known to supply oxygen and nutrients to deep-sea benthos, suggesting that deep-sea biodiversity hotspots are also likely to be microplastic hotspots. [1]: /lookup/doi/10.1126/science.aba5899 [2]: /lookup/doi/10.1126/science.abc1510 |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/273450 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Ian A. Kane,Michael A. Clare,Elda Miramontes,et al. Seafloor microplastic hotspots controlled by deep-sea circulation[J]. Science,2020. |
APA | Ian A. Kane.,Michael A. Clare.,Elda Miramontes.,Roy Wogelius.,James J. Rothwell.,...&Florian Pohl.(2020).Seafloor microplastic hotspots controlled by deep-sea circulation.Science. |
MLA | Ian A. Kane,et al."Seafloor microplastic hotspots controlled by deep-sea circulation".Science (2020). |
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