Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal

Md Mazharul ISLAM; Jun WANG; A B M Sadique RAYHAN; Junge WANG; Sultan Al NAHIAN; Jingwen SHI; Bin CHEN; Hongwei KE; Chunhui WANG; Minggang CAI

doi:10.1007/s00343-024-4098-5

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Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal

Micro- and nano-plastics in marine environments | Updated：2025-03-21

- Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal
- Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal
- 海洋湖沼学报(英文) 2025年43卷第2期页码：474-491
- Affiliations：
  
  1.Coastal and Ocean Management Institute, Xiamen University, Xiamen 361102, China
  2.State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China
  3.College of Environment and Ecology, Xiamen University, Xiamen 361102, China
  4.College of Ocean and Earth Science, Xiamen University, Xiamen 361102, China
  5.Department of Marine Biology, Xiamen Ocean Vocational College, Xiamen 361102, China
  6.Key Laboratory of Estuarine Ecological Security and Environmental Health, Education Department of Fujian, Tan Kah Kee College, Xiamen University, Zhangzhou 363105, China
  7.Department of Environmental Science and Engineering, Tan Kah Kee College, Xiamen University, Zhangzhou 363105, China
  8.Department of Navigation, Marine Fisheries Academy, Chittagong 4000, Bangladesh
  9.Environmental Oceanography and Climate Division, Bangladesh Oceanographic Research Institute, Cox’s Bazar 4730, Bangladesh
- Author bio：
  
  mgcai@xmu.edu.cn
- Funds：
  
  the National Natural Science Foundation of China (NSFC) Shared Voyage Project(41776088;41976018;42049911;U20A20103;U2005207);the Natural Science Key Foundation of Fujian Province, China(2020J01412103);the Hainan Province Science and Technology Special Fund(ZDYF2022SHFZ317);the Guangxi Talent and Innovation Base Project(2018AD19280);the Guangxi Funding Project(04024XM20N0006);the Beihai Science & Technology Project(201995037;202082031;202082022);the Natural Science Foundation of Xiamen City of China(502Z20227322);the China Scholarship Council (CSC Marine Scholarship), the Norwegian Institute of Food, Fishery and Aquaculture, the Governance of Marine Plastic Litter in the Arctic, and the Ministry of Fisheries and Livestock, Bangladesh
- DOI：10.1007/s00343-024-4098-5
  中图分类号：
- 收稿：2024-03-28，
  
  网络首发：2024-06-27，
  
  纸质出版：2025-03-01
- Accepted：
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Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal[J]. 海洋湖沼学报(英文), 2025,43(2):474-491.

ISLAM Md Mazharul,WANG Jun,RAYHAN A B M Sadique,et al.Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal[J].Journal of Oceanology and Limnology,2025,43(02):474-491.
Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal[J]. 海洋湖沼学报(英文), 2025,43(2):474-491. DOI： 10.1007/s00343-024-4098-5.

ISLAM Md Mazharul,WANG Jun,RAYHAN A B M Sadique,et al.Assessment of spatial distribution, sources, and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal[J].Journal of Oceanology and Limnology,2025,43(02):474-491. DOI： 10.1007/s00343-024-4098-5.

摘要

Abstract

Microplastics (MPs) have recently emerged as a significant environmental problem with devastating consequences for organisms. Understanding MPs pollution in the Bay of Bengal is crucial for assessing its ecological impact on marine biodiversity and human health. This study examined the occurrence

spatial distribution

physical and chemical properties

ecological risks

and probable sources of MPs in estuarine and coastal marine environments in the northeastern Bay of Bengal. The average concentration of MPs in surface water of the Karnaphuli estuary

the Meghna estu

ary

and the southeastern coastal region were 916.7±462.6 items/m

462.9±324.5 items/m

and 350.0±190.5 items/m

respectively

varying from 105.0±324.5 items/m

to 1 640.0±462.6 items/m

. In the sediments of the Karnaphuli estuary

the Meghna estuary

and the southeast coast of Bangladesh

the average amount of MPs were 94.3±33.1 items/kg

157.6±89.0 items/kg

and 134.3±38.7 items/kg

with a range of 60±33.1 items/kg to 334.3±89.0 items/kg. Most observed MPs were fibers (60.0% in the water; 56.0% in the sediments)

followed by fragments and lines. Detected MPs were dominated by polypropylene (20.7%) in the water

and acrylic (15.4%) in the sediment

black colored (76.2% in the water

72.7% in the sediments)

and 200–500 µm sized (48% in the water

37% in the sediments). Pollution Risk Index (PRI) indicated significant pollution levels (from medium to very high) in estuarine and coastal areas. Multi-statistical analysis indicated land-based inputs (tourists

local waste

agriculture

and industry) dominated the studied regions. The study emphasized the potential impact of MPs pollution on aquatic ecosystems

emphasizing the need for effective management

mitigation methods

continuous surveillance

and thorough evaluation.

关键词

Keywords

references

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