Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific

Masashi Tsuchiya; Tomo Kitahashi; Ryota Nakajima; Kazumasa Oguri; Kiichiro Kawamura; Akimu Nakamura; Kengo Nakano; Yosaku Maeda; Masafumi Murayama; Sanae Chiba; Katsunori Fujikura

doi:10.1016/j.marpolbul.2023.115466

Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific

Masashi Tsuchiya^*, Tomo Kitahashi, Ryota Nakajima, Kazumasa Oguri, Kiichiro Kawamura, Akimu Nakamura, Kengo Nakano, Yosaku Maeda, Masafumi Murayama, Sanae Chiba, Katsunori Fujikura

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Abstract

Understanding microplastic (MP) behavior in oceans is crucial for reducing marine plastic pollution. However, the complex process underlying MP transportation to the deep seafloor remains unknown despite the deep sea being considered its major sink. We focused on MP distribution in Sagami Bay (adjacent to highly populated areas of Japan), the plate triple junction connected through the Sagami Trough, and the abyssal plain immediately below the Kuroshio Extension. We observed the highest number of MPs in the abyssal stations, more than previously reported. The polymer types and aspect ratio of MPs in the abyssal stations significantly differed from those in the bathyal/hadal stations. The study suggests that MPs accumulated in the open ocean surface layer sink to the abyssal plains immediately below it, while MPs from land sources accumulate in the bathyal depth and are transported to the hadal depth near the coast through turbidity currents along the submarine canyon.

Originalsprog	Engelsk
Artikelnummer	115466
Tidsskrift	Marine Pollution Bulletin
Vol/bind	199
Antal sider	12
ISSN	0025-326X
DOI	https://doi.org/10.1016/j.marpolbul.2023.115466
Status	Udgivet - feb. 2024

Bibliografisk note

Funding Information:
The authors thank the captain, officers, and crew of the R/V Yokosuka, the operational team of the manned submersible Shinkai 6500, M. Morioka, marine technician, Nippon Marine Enterprises, Ltd. We are grateful to the onboard scientists of the YK19-11 cruise, especially the principal scientist A. Yabuki. We also thank K. Iijima for his valuable comments on sedimentary rate estimation, H. Matsuda for her help in the data acquisition of blank samples, and the anonymous reviewers and editors for their valuable comments on the manuscript.

Funding Information:
This work was partially funded by the Environmental Research and Technology Development Fund (SII-2, JPMEERF18S20211) of the Environmental Restoration and Conservation Agency provided by the Ministry of Environment of Japan, and the funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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10.1016/j.marpolbul.2023.115466Licens: CC BY-NC-ND

Open Access VersionForlagets udgivne version, 3,78 MBLicens: CC BY-NC-ND

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Citationsformater

Tsuchiya, M., Kitahashi, T., Nakajima, R., Oguri, K., Kawamura, K., Nakamura, A., Nakano, K., Maeda, Y., Murayama, M., Chiba, S., & Fujikura, K. (2024). Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific. Marine Pollution Bulletin, 199, Artikel 115466. https://doi.org/10.1016/j.marpolbul.2023.115466

@article{edc79354ced14314be279668bcb8eef2,

title = "Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific",

abstract = "Understanding microplastic (MP) behavior in oceans is crucial for reducing marine plastic pollution. However, the complex process underlying MP transportation to the deep seafloor remains unknown despite the deep sea being considered its major sink. We focused on MP distribution in Sagami Bay (adjacent to highly populated areas of Japan), the plate triple junction connected through the Sagami Trough, and the abyssal plain immediately below the Kuroshio Extension. We observed the highest number of MPs in the abyssal stations, more than previously reported. The polymer types and aspect ratio of MPs in the abyssal stations significantly differed from those in the bathyal/hadal stations. The study suggests that MPs accumulated in the open ocean surface layer sink to the abyssal plains immediately below it, while MPs from land sources accumulate in the bathyal depth and are transported to the hadal depth near the coast through turbidity currents along the submarine canyon.",

keywords = "Deep-sea canyon, Deep-sea sediment, Kuroshio Extension recirculation gyre, Marine pollution, Micro FT-IR, Microplastics",

author = "Masashi Tsuchiya and Tomo Kitahashi and Ryota Nakajima and Kazumasa Oguri and Kiichiro Kawamura and Akimu Nakamura and Kengo Nakano and Yosaku Maeda and Masafumi Murayama and Sanae Chiba and Katsunori Fujikura",

note = "Funding Information: The authors thank the captain, officers, and crew of the R/V Yokosuka, the operational team of the manned submersible Shinkai 6500, M. Morioka, marine technician, Nippon Marine Enterprises, Ltd. We are grateful to the onboard scientists of the YK19-11 cruise, especially the principal scientist A. Yabuki. We also thank K. Iijima for his valuable comments on sedimentary rate estimation, H. Matsuda for her help in the data acquisition of blank samples, and the anonymous reviewers and editors for their valuable comments on the manuscript. Funding Information: This work was partially funded by the Environmental Research and Technology Development Fund (SII-2, JPMEERF18S20211) of the Environmental Restoration and Conservation Agency provided by the Ministry of Environment of Japan, and the funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. ",

year = "2024",

month = feb,

doi = "10.1016/j.marpolbul.2023.115466",

language = "English",

volume = "199",

journal = "Marine Pollution Bulletin",

issn = "0025-326X",

publisher = "Elsevier",

}

Tsuchiya, M, Kitahashi, T, Nakajima, R, Oguri, K, Kawamura, K, Nakamura, A, Nakano, K, Maeda, Y, Murayama, M, Chiba, S & Fujikura, K 2024, 'Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific', Marine Pollution Bulletin, bind 199, 115466. https://doi.org/10.1016/j.marpolbul.2023.115466

Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific. / Tsuchiya, Masashi; Kitahashi, Tomo; Nakajima, Ryota et al.
I: Marine Pollution Bulletin, Bind 199, 115466, 02.2024.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

TY - JOUR

T1 - Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific

AU - Tsuchiya, Masashi

AU - Kitahashi, Tomo

AU - Nakajima, Ryota

AU - Oguri, Kazumasa

AU - Kawamura, Kiichiro

AU - Nakamura, Akimu

AU - Nakano, Kengo

AU - Maeda, Yosaku

AU - Murayama, Masafumi

AU - Chiba, Sanae

AU - Fujikura, Katsunori

N1 - Funding Information: The authors thank the captain, officers, and crew of the R/V Yokosuka, the operational team of the manned submersible Shinkai 6500, M. Morioka, marine technician, Nippon Marine Enterprises, Ltd. We are grateful to the onboard scientists of the YK19-11 cruise, especially the principal scientist A. Yabuki. We also thank K. Iijima for his valuable comments on sedimentary rate estimation, H. Matsuda for her help in the data acquisition of blank samples, and the anonymous reviewers and editors for their valuable comments on the manuscript. Funding Information: This work was partially funded by the Environmental Research and Technology Development Fund (SII-2, JPMEERF18S20211) of the Environmental Restoration and Conservation Agency provided by the Ministry of Environment of Japan, and the funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.

PY - 2024/2

Y1 - 2024/2

N2 - Understanding microplastic (MP) behavior in oceans is crucial for reducing marine plastic pollution. However, the complex process underlying MP transportation to the deep seafloor remains unknown despite the deep sea being considered its major sink. We focused on MP distribution in Sagami Bay (adjacent to highly populated areas of Japan), the plate triple junction connected through the Sagami Trough, and the abyssal plain immediately below the Kuroshio Extension. We observed the highest number of MPs in the abyssal stations, more than previously reported. The polymer types and aspect ratio of MPs in the abyssal stations significantly differed from those in the bathyal/hadal stations. The study suggests that MPs accumulated in the open ocean surface layer sink to the abyssal plains immediately below it, while MPs from land sources accumulate in the bathyal depth and are transported to the hadal depth near the coast through turbidity currents along the submarine canyon.

AB - Understanding microplastic (MP) behavior in oceans is crucial for reducing marine plastic pollution. However, the complex process underlying MP transportation to the deep seafloor remains unknown despite the deep sea being considered its major sink. We focused on MP distribution in Sagami Bay (adjacent to highly populated areas of Japan), the plate triple junction connected through the Sagami Trough, and the abyssal plain immediately below the Kuroshio Extension. We observed the highest number of MPs in the abyssal stations, more than previously reported. The polymer types and aspect ratio of MPs in the abyssal stations significantly differed from those in the bathyal/hadal stations. The study suggests that MPs accumulated in the open ocean surface layer sink to the abyssal plains immediately below it, while MPs from land sources accumulate in the bathyal depth and are transported to the hadal depth near the coast through turbidity currents along the submarine canyon.

KW - Deep-sea canyon

KW - Deep-sea sediment

KW - Kuroshio Extension recirculation gyre

KW - Marine pollution

KW - Micro FT-IR

KW - Microplastics

U2 - 10.1016/j.marpolbul.2023.115466

DO - 10.1016/j.marpolbul.2023.115466

M3 - Journal article

C2 - 37806825

AN - SCOPUS:85174579245

SN - 0025-326X

VL - 199

JO - Marine Pollution Bulletin

JF - Marine Pollution Bulletin

M1 - 115466

ER -

Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific

Abstract

Bibliografisk note

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SDU link

Fingeraftryk

Citationsformater