Microplastic contamination, comparative retention efficiency, and ecological hazard in saltmarsh, mangrove, sandy, and muddy habitats along the northern Bay of Bengal coast

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management Pub Date : 2025-04-23 DOI:10.1016/j.ocecoaman.2025.107695

Bilal Ahamad Paray , Khadijatul Kubra Riya , David J. Marshall , Md Kamal Hossain , Partho Banik , Salma Sultana , Jimmy Yu , Norhayati Ngah , M. Belal Hossain

{"title":"Microplastic contamination, comparative retention efficiency, and ecological hazard in saltmarsh, mangrove, sandy, and muddy habitats along the northern Bay of Bengal coast","authors":"Bilal Ahamad Paray , Khadijatul Kubra Riya , David J. Marshall , Md Kamal Hossain , Partho Banik , Salma Sultana , Jimmy Yu , Norhayati Ngah , M. Belal Hossain","doi":"10.1016/j.ocecoaman.2025.107695","DOIUrl":null,"url":null,"abstract":"<div><div>Understanding the role of coastal habitats as microplastic \"sinks\" and estimating associated ecological risks are crucial due to the unique biodiversity and socioeconomic importance of these ecosystems. This study was the first to assess microplastic (MP) retention efficiency in the sediments of four coastal habitat types (saltmarsh, mangrove, mudflat and sandflat) along the northern Bay of Bengal coast, focusing on morpho-chemical attributes, accumulation patterns, and associated ecological risks. Univariate and multivariate statistical analyses (ANOVA, ANOSIM, and nMDS) were applied to examine variations in MP abundance and retention patterns across coastal habitats.The analysis unveiled the presence of MPs across all habitats, with retention trends of saltmarsh > mangrove > mudflat > sandflat. The higher accumulation of MPs in saltmarshes suggested they might serve to reduce the spread of MPs from land to ocean, thereby mitigating their negative impacts.The average MP accumulation was 35.14 ± 19.19 items/kg of sediment, with the highest concentrations in vegetated sediments (mangrove and saltmarsh), showing significant habitat variation (p < 0.05). Vegetation played a key role in MP movement, distribution, and accumulation, with fibers (85 %) being the most prevalent form, followed by films (11 %), fragments (2.5 %), and foams (1.3 %). MPs <0.5 mm were predominant (83 %), suggesting that coastal habitats are effective in trapping smaller MPs. FTIR analysis identified PE (36.67 %), PET (16.67 %), SBR (13 %), Cellulose (13.33 %), PP (11.67 %), and PS (8.33 %) across habitats. The Pollution Load Index (PLI) indicated high MP pollution, while the Contamination Factor (CF) showed a moderate pollution level. The Pollution Hazard Index (PHI) revealed a category II hazard, highlighting significant threats to coastal ecosystems. The results supports vegetation promotion to limit MP spread and the development of targeted pollution management and mitigation strategies.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107695"},"PeriodicalIF":4.8000,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ocean & Coastal Management","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0964569125001577","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OCEANOGRAPHY","Score":null,"Total":0}

引用次数: 0

Abstract

Understanding the role of coastal habitats as microplastic "sinks" and estimating associated ecological risks are crucial due to the unique biodiversity and socioeconomic importance of these ecosystems. This study was the first to assess microplastic (MP) retention efficiency in the sediments of four coastal habitat types (saltmarsh, mangrove, mudflat and sandflat) along the northern Bay of Bengal coast, focusing on morpho-chemical attributes, accumulation patterns, and associated ecological risks. Univariate and multivariate statistical analyses (ANOVA, ANOSIM, and nMDS) were applied to examine variations in MP abundance and retention patterns across coastal habitats.The analysis unveiled the presence of MPs across all habitats, with retention trends of saltmarsh > mangrove > mudflat > sandflat. The higher accumulation of MPs in saltmarshes suggested they might serve to reduce the spread of MPs from land to ocean, thereby mitigating their negative impacts.The average MP accumulation was 35.14 ± 19.19 items/kg of sediment, with the highest concentrations in vegetated sediments (mangrove and saltmarsh), showing significant habitat variation (p < 0.05). Vegetation played a key role in MP movement, distribution, and accumulation, with fibers (85 %) being the most prevalent form, followed by films (11 %), fragments (2.5 %), and foams (1.3 %). MPs <0.5 mm were predominant (83 %), suggesting that coastal habitats are effective in trapping smaller MPs. FTIR analysis identified PE (36.67 %), PET (16.67 %), SBR (13 %), Cellulose (13.33 %), PP (11.67 %), and PS (8.33 %) across habitats. The Pollution Load Index (PLI) indicated high MP pollution, while the Contamination Factor (CF) showed a moderate pollution level. The Pollution Hazard Index (PHI) revealed a category II hazard, highlighting significant threats to coastal ecosystems. The results supports vegetation promotion to limit MP spread and the development of targeted pollution management and mitigation strategies.

Abstract Image

查看原文本刊更多论文

孟加拉湾北部沿海盐沼、红树林、沙质和泥泞生境的微塑料污染、相对滞留效率和生态危害

由于这些生态系统具有独特的生物多样性和社会经济重要性，了解沿海栖息地作为微塑料“汇”的作用并估计相关的生态风险至关重要。本研究首次评估了孟加拉湾北部海岸四种沿海栖息地类型（盐沼、红树林、泥滩和沙滩）沉积物中的微塑料（MP）保留效率，重点关注形态化学属性、积累模式和相关生态风险。采用单变量和多变量统计分析（ANOVA， ANOSIM和nMDS）来检查沿海栖息地中MP丰度和保留模式的变化。分析揭示了国会议员在所有栖息地的存在，以及盐沼的保留趋势。红树林的在泥滩祝辞sandflat。盐沼中MPs的较高积累表明，它们可能有助于减少MPs从陆地向海洋的传播，从而减轻其负面影响。MP的平均累积量为35.14±19.19个/kg，在植被沉积物（红树林和盐沼）中含量最高，具有显著的生境差异(p <；0.05)。植被在MP的运动、分布和积累中起着关键作用，其中纤维（85%）是最常见的形式，其次是薄膜（11%）、碎片（2.5%）和泡沫（1.3%）。0.5 mm的浮游生物占多数（83%），这表明沿海生境对捕获较小的浮游生物是有效的。FTIR分析鉴定出不同生境的PE（36.67%）、PET（16.67%）、SBR（13%）、Cellulose（13.33%）、PP（11.67%）和PS（8.33%）。污染负荷指数（PLI）为重度污染，污染因子（CF）为中度污染。污染危害指数（PHI）显示为II类危害，沿海生态系统受到严重威胁。研究结果支持促进植被以限制MP的扩散，并制定有针对性的污染管理和缓解战略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ocean & Coastal Management 环境科学-海洋学

CiteScore

8.50

自引率

15.20%

发文量

321

审稿时长

60 days

期刊介绍： Ocean & Coastal Management is the leading international journal dedicated to the study of all aspects of ocean and coastal management from the global to local levels. We publish rigorously peer-reviewed manuscripts from all disciplines, and inter-/trans-disciplinary and co-designed research, but all submissions must make clear the relevance to management and/or governance issues relevant to the sustainable development and conservation of oceans and coasts. Comparative studies (from sub-national to trans-national cases, and other management / policy arenas) are encouraged, as are studies that critically assess current management practices and governance approaches. Submissions involving robust analysis, development of theory, and improvement of management practice are especially welcome.