Microplastics in the surface waters of the northern South China Sea: Interannual variation and potential ecological risks

被引:1
|
作者
Ni, Zhixin [1 ,2 ,3 ]
Chen, Xin [1 ,2 ]
Zhang, Minxia [4 ]
Lu, Chuqian [1 ,2 ]
Ji, Xiao [5 ]
Yuan, Lei [1 ,2 ]
Chen, Changshu [1 ,2 ]
Chen, Zhiqiang [1 ,2 ]
Ye, Jianping [1 ,2 ]
Yang, Jiayu [1 ,2 ]
机构
[1] Minist Nat Resources MNR, South China Sea Ecol Ctr, Nansha Isl Coral Reef Ecosyst Natl Observat & Res, Guangzhou 510300, Peoples R China
[2] MNR, Key Lab Marine Environm Survey Technol & Applicat, Guangzhou 510300, Peoples R China
[3] Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510301, Peoples R China
[4] China Natl Offshore Oil Corp Res Inst, Beijing 100028, Peoples R China
[5] Minist Nat Resources MNR, East China Sea Ecol Ctr, Shanghai 201206, Peoples R China
关键词
Microplastics; Distribution; Pollution; Ecological risk; South China sea; ZOOPLANKTON; LOST;
D O I
10.1016/j.marenvres.2025.106947
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Microplastic pollution in marine environments has become a global concern due to its potential ecological risks. However, long-term data on microplastic distribution are scare, hindering the assessment of the ecological threats. This study monitored microplastics pollution in the surface water of the northern South China Sea from 2019 to 2023. The average abundance of microplastics exhibited an increasing trend from 2019 to 2021 and a subsequent decrease from 2021 to 2023 in both the Pearl River Estuary and Zhanjiang offshore waters. Conversely, a steady annual decrease was observed in the surface waters of Beibu Gulf from 2020 to 2023. The spatial variability of microplastic hotspot across different years and regions. Microplastics predominantly ranged from 1 to 2 mm in size, with fragments and fibers being the most common shapes and transparent and white colors being the most prevalent. The primary chemical components of microplastics were polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). No significant inter-annual differences were observed in the physicochemical characteristics of microplastics. The pollution load index (PLI) indicated medium to low levels of microplastic pollution, with the potential ecological risk index (PERI) suggesting a low level of ecological risk, implying a minimal threat to the marine ecosystem. This study first revealed the annual variations in microplastic pollution and their potential ecological risks in the northern South China Sea, providing crucial data support for the future management and control of marine microplastic pollution.
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页数:8
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