Article
?
AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button.
Tier 2
?
Original research — experimental, observational, or case-control study. Direct primary evidence.
Sign in to save
Microplastics on the sea surface of the semi-closed Tokyo Bay
Marine Pollution Bulletin2020
81 citations
?
Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 40
?
0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Researchers surveyed microplastic pollution in Tokyo Bay using neuston nets in May 2019 and January 2020, finding average abundances of 3.98 pieces per square metre with polyethylene fragments dominating, and identifying river inputs as the primary source based on matching seasonal abundance patterns between riverine and inner bay samples.
Microplastics (MPs) pollution surveys were conducted in Tokyo Bay using neuston nets (May 2019 and January 2020). Although the pollution level in Tokyo Bay was high (3.98 pcs/m, May), it was lower than reported in other semi-closed bays because of differences in the Enclosed Index. It was found that polyethylene fragments dominated the retrieved MPs; the mode of MPs size was 800 μm. As MPs abundance in rivers had the same seasonality as found in the inner bay, rivers were considered the main source of MPs. The seawater residence time is shorter than the time required for the density of MPs to become greater than that of seawater; therefore, it was considered that MPs are transported out of the bay instead of sinking. MPs were aggregated into a convergence zone by residual currents (the thermohaline front) in May (January). These findings will improve understanding of MPs pollution in other bays.