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Article ; Online: Dynamics of microplastic transport and accumulation in a rural coastal area: Insights from the Otsuchi Bay, a small ria in Sanriku, Japan

Wang, Yehao / Yamashita, Rei / Matsumura, Yoshimasa / Itō, Shin'ichi / Komatsu, Kosei

Regional Studies in Marine Science. , p.102964-

2023 , Page(s) 102964–

Abstract: Microplastic (MP) pollution in coastal areas has received increasing attention recently. However, studies focused on MP pollution in rural coastal areas remain limited compared to those in metropolitan coastal areas. This study observed MP particles ... ...

Abstract	Microplastic (MP) pollution in coastal areas has received increasing attention recently. However, studies focused on MP pollution in rural coastal areas remain limited compared to those in metropolitan coastal areas. This study observed MP particles accumulated on the seafloor of the Otsuchi Bay, a small ria bay located on the Pacific coast, Sanriku, Japan. The MP concentrations in the sediment ranged from 2.6 ± 0.3 to 13.6 ± 9.8 pcs g−1 dry weight (DW) and 2.6 ± 1.4 to 5.1 ± 1.2 pcs g−1 DW in March and September 2021, respectively. No significant difference in MP concentrations was detected between March and September. The MP concentration in the Otsuchi Bay was lower than that observed in other highly populated coastal areas but was relatively high considering the population size of the catchment area. MP particles smaller than 1000μm were the most prevalent, accounting for 96.3% of all MP samples. MP size at the bay head was smaller than that at the central bay for high-density MPs; however, the relationship was reversed for low-density MPs. Analysis of the MP distribution pattern using a two-dimensional numerical model suggests that the horizontal distribution of MPs in the Otsuchi Bay depends on the size and density of MP particles. It is also strongly influenced by both the tidal oscillating currents characteristic to the bay and vertical terminal velocity of MP particles. Sedimented MP distributions in a bay with a small catchment population with limited MP sources shed light on our understanding of MP transport dynamics.
Keywords	Japan ; coasts ; marine science ; mathematical models ; microplastics ; pollution ; population size ; sediments ; terminal velocity ; watersheds ; Microplastic ; Seabed sediment ; Polymer type ; Rural coastal area ; Particle tracking model
Language	English
Publishing place	Elsevier B.V.
Document type	Article ; Online
Note	Pre-press version ; Use and reproduction
ISSN	2352-4855
DOI	10.1016/j.rsma.2023.102964
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Floating plastic accumulation and distribution around Kuroshio Current, western North Pacific.

Thushari, Gajahin Gamage Nadeeka / Miyazono, Kentaro / Sato, Takuya / Yamashita, Rei / Takasuka, Akinori / Watai, Mikio / Yasuda, Tohya / Kuroda, Hiroshi / Takahashi, Kazutaka

Marine pollution bulletin

2023 Volume 188, Page(s) 114604

Abstract: The distribution of floating plastic debris around the Kuroshio Current which transports plastics from the coastal waters of Asian countries to North Pacific subtropical gyre, was investigated in 2014. The mean abundance and weight of plastic debris on ... ...

Abstract	The distribution of floating plastic debris around the Kuroshio Current which transports plastics from the coastal waters of Asian countries to North Pacific subtropical gyre, was investigated in 2014. The mean abundance and weight of plastic debris on the sea surface were 100,376 counts/km
MeSH term(s)	Plastics ; Water Movements ; Japan ; Asia ; Polypropylenes ; Pacific Ocean ; Environmental Monitoring
Chemical Substances	Plastics ; Polypropylenes
Language	English
Publishing date	2023-01-25
Publishing country	England
Document type	Journal Article
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2023.114604
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Article: Large-scale distribution and composition of floating plastic debris in the transition region of the North Pacific

Miyazono, Kentaro / Yamashita, Rei / Miyamoto, Hiroomi / Ishak, Nurul Huda Ahmad / Tadokoro, Kazuaki / Shimizu, Yugo / Takahashi, Kazutaka

Marine pollution bulletin. 2021 Sept., v. 170

2021

Abstract: Floating plastic debris was investigated in the transition region in the North Pacific between 141°E and 165°W to understand its transportation process from Asian coast to central subtropical Pacific. Distribution was influenced primarily by the current ... ...

Abstract	Floating plastic debris was investigated in the transition region in the North Pacific between 141°E and 165°W to understand its transportation process from Asian coast to central subtropical Pacific. Distribution was influenced primarily by the current system and the generation process of the high concentration area differed between the western and eastern areas. West of 180°, debris largely accumulated around nearshore convergent area and was transported by eddies and quasi-stationary jet from south to the subarctic region. The average was 15% higher than that previously reported in 1989, suggesting an increase in plastic debris in 30 years. East of 180°, debris concentrated in the calm water downstream of the Kuroshio Extension Bifurcation with considerably high concentration (505,032 ± 991,989 pieces km⁻²), due to the accumulation of small transparent film caused by calm weather conditions, suggesting a further investigation on small plastic (<1 mm) in the subsurface depth in the subtropical North Pacific.
Keywords	coasts ; marine pollution ; plastics ; transportation ; weather
Language	English
Dates of publication	2021-09
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2021.112631
Database	NAL-Catalogue (AGRICOLA)

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Article: Relationship between ocean area and incidence of anthropogenic debris ingested by longnose lancetfish (Alepisaurus ferox)

Kuroda, Mao / Uchida, Keiichi / Kitakado, Toshihide / Shiode, Daisuke / Nemoto, Masao / Miyamoto, Yoshinori / Takada, Hideshige / Yamashita, Rei / Hamada, Hiroaki / Hagita, Ryuichi / Joshima, Hiroki / Yamada, Yuta

Regional studies in marine science. 2022 Sept., v. 55

2022

Abstract: Marine debris is present between the sea surface and the sea floor, but few studies have investigated plastic in water column. Therefore, we chose longnose lancetfish (Alepisaurus ferox) as a sample, this study samples mesopelagic species that ingest ... ...

Abstract	Marine debris is present between the sea surface and the sea floor, but few studies have investigated plastic in water column. Therefore, we chose longnose lancetfish (Alepisaurus ferox) as a sample, this study samples mesopelagic species that ingest marine debris in the water column. We conducted a survey of the stomach contents of longnose lancetfish caught by longline fishing in three areas (Sagami Bay, Northwestern Pacific Ocean about 190 km southeast of Kyushu, Indian Ocean about 1200 km southwest of Sumatra Island, Indonesia). A total of 164 longnose lancetfish were caught. Our results highlighted four marine debris patterns. First, longnose lancetfish caught near the coast had a higher frequency of ingested anthropogenic items (Sagami Bay: 69%) than longnose lancetfish caught in the open ocean area (Northwestern Pacific Ocean: 13%, Indian Ocean: 18%). Second, the size of the plastic present in the ocean in the sea area close to the coast ingested by longnose lancetfish tended to be smaller than in the open ocean area. Third, 93% of the anthropogenic items obtained from the stomach were plastic, of which ¿90% was either polypropylene (PP) or polyethylene (PE). And last, the sources of marine debris in the middle and deep regions of the open ocean are fishing activities carried out in that sea area and items that drift from the land without losing buoyancy. Our research makes new discoveries about characteristics of the marine debris in the ocean.
Keywords	Alepisaurus brevirostris ; Japan ; coasts ; marine debris ; marine science ; polyethylene ; polypropylenes ; stomach ; surveys ; Indian Ocean ; Indonesia ; Pacific Ocean
Language	English
Dates of publication	2022-09
Publishing place	Elsevier B.V.
Document type	Article
ISSN	2352-4855
DOI	10.1016/j.rsma.2022.102476
Database	NAL-Catalogue (AGRICOLA)

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Article: PCBs and PBDEs in microplastic particles and zooplankton in open water in the Pacific Ocean and around the coast of Japan

Yeo, Bee Geok / Takada, Hideshige / Yamashita, Rei / Okazaki, Yohei / Uchida, Keiichi / Tokai, Tadashi / Tanaka, Kosuke / Trenholm, Nicole

Marine pollution bulletin. 2020 Feb., v. 151

2020

Abstract: PCBs and PBDEs in microplastics and zooplankton collected in surface water at 27 locations in the Pacific Ocean and around the coast of Japan were investigated. Both PCBs and PBDEs were observed in buoyant microplastics, even in smaller particles of 0 ... ...

Abstract	PCBs and PBDEs in microplastics and zooplankton collected in surface water at 27 locations in the Pacific Ocean and around the coast of Japan were investigated. Both PCBs and PBDEs were observed in buoyant microplastics, even in smaller particles of 0.315–1 mm. Concentrations of Σ13 PCBs were 0.04–124 ng/g, and were higher in urban bay areas such as Tokyo Bay. Sporadic moderate to high concentrations of PBDEs were observed in both urban-offshore and rural-offshore locations, consisting mostly of higher-brominated congeners. From the latter, BDE 209 ranged from not detected to 2158 ng/g. The microplastic-to-zooplankton abundance ratio threshold was 0.6 for PCBs and 0.08 for PBDEs, above which exposure would be greater from microplastics than from zooplankton.
Keywords	Japan ; coasts ; marine pollution ; microplastics ; surface water ; zooplankton ; Pacific Ocean
Language	English
Dates of publication	2020-02
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2019.110806
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Mapping marine debris encountered by albatrosses tracked over oceanic waters.

Nishizawa, Bungo / Thiebot, Jean-Baptiste / Sato, Fumio / Tomita, Naoki / Yoda, Ken / Yamashita, Rei / Takada, Hideshige / Watanuki, Yutaka

Scientific reports

2021 Volume 11, Issue 1, Page(s) 10944

Abstract: Anthropogenic marine debris is a threat to marine organisms. Understanding how this debris spatially distributes at sea and may become associated with marine wildlife are key steps to tackle this current issue. Using bird-borne GPS- and video-loggers on ... ...

Abstract	Anthropogenic marine debris is a threat to marine organisms. Understanding how this debris spatially distributes at sea and may become associated with marine wildlife are key steps to tackle this current issue. Using bird-borne GPS- and video-loggers on 13 black-footed albatrosses Phoebastria nigripes breeding in Torishima, Japan, we examined the distribution of large floating debris in the Kuroshio Current area, western North Pacific. A total of 16 floating debris, including styrofoam (n = 4), plastic pieces (n = 3), plastic sheet (n = 1), fishery-related items (rope or netting, n = 4), and unidentified debris (n = 4), were recorded across the 9003 km covered by nine birds. The debris was concentrated in the southern area of the Kuroshio Current, where the surface current was weak, and the albatrosses were foraging. The albatrosses displayed changes in flight direction towards the debris when at a mean distance of 4.9 km, similarly to when approaching prey, and one bird was observed pecking at a plastic sheet; indicating that albatrosses actively interacted with the debris. This paper shows the usefulness of studying wide-ranging marine predators through the use of combined biologging tools, and highlights areas with increased risk of debris exposure and behavioral responses to debris items.
Language	English
Publishing date	2021-05-25
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-021-90417-x
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Large-scale distribution and composition of floating plastic debris in the transition region of the North Pacific.

Miyazono, Kentaro / Yamashita, Rei / Miyamoto, Hiroomi / Ishak, Nurul Huda Ahmad / Tadokoro, Kazuaki / Shimizu, Yugo / Takahashi, Kazutaka

Marine pollution bulletin

2021 Volume 170, Page(s) 112631

Abstract	Floating plastic debris was investigated in the transition region in the North Pacific between 141°E and 165°W to understand its transportation process from Asian coast to central subtropical Pacific. Distribution was influenced primarily by the current system and the generation process of the high concentration area differed between the western and eastern areas. West of 180°, debris largely accumulated around nearshore convergent area and was transported by eddies and quasi-stationary jet from south to the subarctic region. The average was 15% higher than that previously reported in 1989, suggesting an increase in plastic debris in 30 years. East of 180°, debris concentrated in the calm water downstream of the Kuroshio Extension Bifurcation with considerably high concentration (505,032 ± 991,989 pieces km
MeSH term(s)	Environmental Monitoring ; Pacific Ocean ; Plastics ; Waste Products/analysis ; Water ; Water Pollutants, Chemical/analysis ; Weather
Chemical Substances	Plastics ; Waste Products ; Water Pollutants, Chemical ; Water (059QF0KO0R)
Language	English
Publishing date	2021-06-24
Publishing country	England
Document type	Journal Article
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2021.112631
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Article ; Online: PCBs and PBDEs in microplastic particles and zooplankton in open water in the Pacific Ocean and around the coast of Japan.

Yeo, Bee Geok / Takada, Hideshige / Yamashita, Rei / Okazaki, Yohei / Uchida, Keiichi / Tokai, Tadashi / Tanaka, Kosuke / Trenholm, Nicole

Marine pollution bulletin

2019 Volume 151, Page(s) 110806

Abstract	PCBs and PBDEs in microplastics and zooplankton collected in surface water at 27 locations in the Pacific Ocean and around the coast of Japan were investigated. Both PCBs and PBDEs were observed in buoyant microplastics, even in smaller particles of 0.315-1 mm. Concentrations of Σ13 PCBs were 0.04-124 ng/g, and were higher in urban bay areas such as Tokyo Bay. Sporadic moderate to high concentrations of PBDEs were observed in both urban-offshore and rural-offshore locations, consisting mostly of higher-brominated congeners. From the latter, BDE 209 ranged from not detected to 2158 ng/g. The microplastic-to-zooplankton abundance ratio threshold was 0.6 for PCBs and 0.08 for PBDEs, above which exposure would be greater from microplastics than from zooplankton.
MeSH term(s)	Animals ; Environmental Monitoring ; Halogenated Diphenyl Ethers/analysis ; Japan ; Microplastics/analysis ; Pacific Ocean ; Plastics ; Polychlorinated Biphenyls/analysis ; Tokyo ; Water Pollutants, Chemical/analysis ; Zooplankton
Chemical Substances	Halogenated Diphenyl Ethers ; Microplastics ; Plastics ; Water Pollutants, Chemical ; Polychlorinated Biphenyls (DFC2HB4I0K)
Language	English
Publishing date	2019-12-10
Publishing country	England
Document type	Journal Article
ZDB-ID	2001296-2
ISSN	1879-3363 ; 0025-326X
ISSN (online)	1879-3363
ISSN	0025-326X
DOI	10.1016/j.marpolbul.2019.110806
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Facilitated Leaching of Additive-Derived PBDEs from Plastic by Seabirdsâ Stomach Oil and Accumulation in Tissues

Tanaka, Kosuke / Fukuwaka Masa-aki / Mizukawa Kaoruko / Takada Hideshige / Watanuki Yutaka / Yamashita Rei

Environmental Science & Technology. 2015 Oct. 06, v. 49, no. 19

2015

Abstract: Our previous study suggested the transfer of polybrominated diphenyl ether (PBDE) flame retardants from ingested plastics to seabirdsâ tissues. To understand how the PBDEs are transferred, we studied leaching from plastics into digestive fluids. We ... ...

Abstract	Our previous study suggested the transfer of polybrominated diphenyl ether (PBDE) flame retardants from ingested plastics to seabirdsâ tissues. To understand how the PBDEs are transferred, we studied leaching from plastics into digestive fluids. We hypothesized that stomach oil, which is present in the digestive tract of birds in the order Procellariiformes, acts as an organic solvent, facilitating the leaching of hydrophobic chemicals. Pieces of plastic compounded with deca-BDE were soaked in several leaching solutions. Trace amounts were leached into distilled water, seawater, and acidic pepsin solution. In contrast, over 20 times as much material was leached into stomach oil, and over 50 times as much into fish oil (a major component of stomach oil). Analysis of abdominal adipose, liver tissue, and ingested plastics from 18 wild seabirds collected from the North Pacific Ocean showed the occurrence of deca-BDE or hexa-BDEs in both the tissues and the ingested plastics in three of the birds, suggesting transfer from the plastic to the tissues. In birds with BDE209 in their tissues, the dominance of BDE207 over other nona-BDE isomers suggested biological debromination at the meta position. Model calculation of PBDE exposure to birds based on the results of the leaching experiments combined with field observations suggested the dominance of plastic-mediated internal exposure to BDE209 over exposure via prey.
Keywords	digestive tract ; fish oils ; flame retardants ; hydrophobicity ; isomers ; leaching ; pepsin ; plastics ; polybrominated diphenyl ethers ; Procellariiformes ; seabirds ; seawater ; solvents ; stomach ; tissues ; Pacific Ocean
Language	English
Dates of publication	2015-1006
Size	p. 11799-11807.
Publishing place	American Chemical Society
Document type	Article
ISSN	1520-5851
DOI	10.1021%2Facs.est.5b01376
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: On Study of Vehicular Movement Data Analysis for Generating Driving Behavior and Road Situation Information

Yamashita Rei-Jo / Yao Hsiu-Hsen

Lecture Notes in Engineering and Computer Science, Vol 2174, Iss 1, Pp 92-

2009 Volume 97

Keywords	Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
Language	English
Publishing date	2009-03-01T00:00:00Z
Publisher	Newswood and International Association of Engineers
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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