Tracing the Century-Long Evolution of Microplastics Deposition in a Cold Seep.
Adv Sci (Weinh)
; 10(10): e2206120, 2023 04.
Article
in English
| MEDLINE | ID: covidwho-2264801
ABSTRACT
Microplastic (MP) pollution is one of the greatest threats to marine ecosystems. Cold seeps are characterized by methane-rich fluid seepage fueling one of the richest ecosystems on the seafloor, and there are approximately more than 900 cold seeps globally. While the long-term evolution of MPs in cold seeps remains unclear. Here, how MPs have been deposited in the Haima cold seep since the invention of plastics is demonstrated. It is found that the burial rates of MPs in the non-seepage areas significantly increased since the massive global use of plastics in the 1930s, nevertheless, the burial rates and abundance of MPs in the methane seepage areas are much lower than the non-seepage area of the cold seep, suggesting the degradation potential of MPs in cold seeps. More MP-degrading microorganism populations and functional genes are discovered in methane seepage areas to support this discovery. It is further investigated that the upwelling fluid seepage facilitated the fragmentation and degradation behaviors of MPs. Risk assessment indicated that long-term transport and transformation of MPs in the deeper sediments can reduce the potential environmental and ecological risks. The findings illuminated the need to determine fundamental strategies for sustainable marine plastic pollution mitigation in the natural deep-sea environments.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Ecosystem
/
Geologic Sediments
Type of study:
Prognostic study
Language:
English
Journal:
Adv Sci (Weinh)
Year:
2023
Document Type:
Article
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