期刊
MARINE POLLUTION BULLETIN
卷 174, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2021.113047
关键词
Plastic; Microplastic; Deep sea; Sediment; ROV; Pollution transport; Submarine canyons
资金
- U.S. Department of the Interior, Bureau of Ocean Energy Management, Environmental Studies Program, Washington, DC [M10PC00100]
- U.S. Geological Survey DISCOVRE Mid-Atlantic Canyons project
Anthropogenic debris has been found in all studied marine environments, even in the deepest parts of the sea. This study examined sediment cores and ROV video to analyze the density and distribution of debris, including micro-and macroplastics, in Norfolk and Baltimore canyons. The findings show that canyons serve as important repositories and conduits for debris to the deep sea, impacting benthic invertebrate communities.
Anthropogenic debris has been reported in all studied marine environments, including the deepest parts of the sea. Finding areas of accumulation and methods of transport for debris are important to determine potential impacts on marine life. This study analyzed both sediment cores and Remotely Operated Vehicle video to determine the density and distribution of debris, including both micro-and macroplastics, in Norfolk and Baltimore canyons. The average microplastic density in Norfolk Canyon sediment was 37.30 plastic particles m(-2) within the canyon and 21.03 particles m(-2) on the adjacent slope, suggesting that microplastics could accumulate within submarine canyons. In video transects from both Norfolk and Baltimore canyons, the largest amounts of macroplastic were recorded near the canyon heads. Our findings contribute to a growing evidence base that canyons and their associated benthic invertebrate communities are important repositories and conduits for debris to the deep sea.
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