Distribution and ecological risks of microplastics in a tropical tourism island area in Hainan,China  

作　　者：Weijie BIAN Rui SUN Yurui LI Shuguo LÜ Dongwei YANG Hongbo LI Yingxu ZENG Min LIU 

机构地区：[1]Yazhou Bay Innovation Institute/Key Laboratory for Coastal Marine Eco-environment Process and Carbon Sink of Hainan Province/Modern Marine Ranching Engineering Research Center of Hainan/College of Ecology and Environment,Hainan Tropical Ocean University,Sanya 572022,China [2]Hainan Academy of Environmental Science,Haikou 571126,China [3]Key Laboratory of Island Tourism Resource Data Mining and Monitoring,Ministry of Culture and Tourism,Hainan Tropical Ocean University,Sanya 572022,China [4]National Marine Environmental Monitoring Center,Dalian 116023,China

出　　处：《Journal of Oceanology and Limnology》2025年第2期433-445,共13页海洋湖沼学报(英文)

基　　金：the Hainan Provincial Natural Science Foundation of China(No.422MS082);the Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City(No.2021CXLH0009);the Funding Scheme for High-level Overseas Chinese Students’Return of Ministry of Human Resources and Social Security of China and Science;Open Project Program of Yazhou Bay Innovation Institute of Hainan Tropical Ocean University(No.2022RHDKFKT08);Technology Project of Yazhou Bay Innovation Institute of Hainan Tropical Ocean University(No.2022CXYZD002)。

摘　　要：Microplastics are a widely distributed pollutant that threatens the growth and health of marine organisms.Compared to the mainland,island ecosystems with unique characteristics are fragile and sensitive to natural and human interference.We investigated the characteristics and ecological risks of microplastics in the soils of Wuzhizhou Island,Hainan,China,and its surrounding nearshore sediments affected by human activities.Results show that the microplastic abundance in soil was 1116.67 items/kg;the particles were fragmented in size of less than 2 mm,the main polymer types were polypropylene(PP),polyethylene(PE),and polybutylene(PB),in transparent,gray,green,or white.The microplastic abundances in nearshore sediments of Wuzhizhou Island and the surrounding Haitang Bay were 274.67 and 755.17 items/kg,respectively;the particles were mainly fibrous,less than 1 mm in size,the main polymer types were rayon and polyethylene terephthalate(PET),mostly transparent.The abundance of microplastics showed a decreasing trend from shore to sea.Microplastics in the supratidal and intertidal zones differed in mainly the abundance and size.The microplastics in land soil were from tourism activities and infrastructure while the those in nearshore sediments came from not only tourism but also domestic sewage and fishing activities.The ecological risk of microplastics in the terrestrial soils of Wuzhizhou Island was higher than that in its surrounding nearshore sediments.These findings help to gain a deeper understanding of microplastic pollution in the island subjected to intensive human activities,and provide a scientific basis for subsequent in-situ toxicology research on microplastics and plastic pollution control.

关 键 词：microplastic occurrence characteristic ecological risk tropical tourism island 

分 类 号：X55[环境科学与工程—环境工程] X826