Marine pollution bulletin最新文献_第2页

Distribution of 137Cs in surface waters of the Atlantic Ocean (50°S – 61°N) in 2020–2022 based on field research on cruises 79 and 87 of the R/V “Akademik Mstislav Keldysh” 2020-2022年大西洋（50°S—61°N）表层水体137Cs的分布——基于“米斯蒂斯拉夫·凯迪什院士号”第79和87次巡航的实地考察

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-29 DOI: 10.1016/j.marpolbul.2025.118517

I.G. Sidorov , O.N. Miroshnichenko , N.Yu. Mirzoeva , A.A. Paraskiv , V.Yu. Proskurnin , E.G. Morozov , M.I. Silakov , R.V. Gorbunov

引用次数: 0

Genomic insights into antibiotic-resistant Vibrio species from clinical and coastal environmental sources in India 来自印度临床和沿海环境来源的抗生素抗性弧菌物种的基因组见解

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-29 DOI: 10.1016/j.marpolbul.2025.118496

P.S. Seethalakshmi , Abdulaziz Anas , K. Devika Raj , C. Jasmin , Nandini Menon , Grinson George , Shubha Sathyendranath

{"title":"Genomic insights into antibiotic-resistant Vibrio species from clinical and coastal environmental sources in India","authors":"P.S. Seethalakshmi , Abdulaziz Anas , K. Devika Raj , C. Jasmin , Nandini Menon , Grinson George , Shubha Sathyendranath","doi":"10.1016/j.marpolbul.2025.118496","DOIUrl":"10.1016/j.marpolbul.2025.118496","url":null,"abstract":"<div><div>The occurrence and impact of pathogenic <em>Vibrio</em> sp. in coastal waters are strongly influenced by climate change indicators such as ocean warming, sea-level rise, and extreme weather events. This study aimed to compare the virulence and antimicrobial resistance (AMR) profiles of <em>Vibrio cholerae</em> from clinical and environmental sources across India's coastal regions. We also examined pathogenic traits in other marine <em>Vibrio</em> sp. We hypothesized that <em>Vibrio</em> spp. from different environments would show distinct virulence and AMR patterns shaped by their ecological context. To investigate this, we conducted antimicrobial susceptibility testing and whole-genome sequencing (WGS) on both clinical and environmental isolates. Our findings reveal that environmental <em>V. cholerae</em> from coastal waters possess genes promoting host adhesion and haemolytic activity. Similarly, <em>Vibrio alginolyticus</em> and <em>Vibrio vulnificus</em> harboured virulence factors aiding tissue attachment and invasion. Resistance profiling showed environmental <em>V. cholerae</em> were resistant to fluoroquinolones and macrolides, while clinical isolates were resistant to aminoglycosides and sulphonamides. The presence of antibiotic-resistant <em>Vibrio</em> in marine environments poses a significant public health risk, especially given frequent human interactions with coastal waters for recreation, fishing, and transport. Climate change may exacerbate the proliferation and movement of these pathogens across aquatic and terrestrial systems, increasing the likelihood of human exposure. Moreover, the potential for horizontal gene transfer of resistance genes among pathogenic marine bacteria further highlights the need for surveillance and mitigation strategies to address the growing threat of AMR in marine ecosystems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118496"},"PeriodicalIF":4.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthetic microfibers driven by turbidity currents: Transition from smooth bed to macro-roughness 由浊度流驱动的合成微纤维：从平滑床到宏观粗糙床的过渡

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-29 DOI: 10.1016/j.marpolbul.2025.118509

Mirco Mancini , Marianna Soler , Jordi Colomer , Luca Solari , Teresa Serra

{"title":"Synthetic microfibers driven by turbidity currents: Transition from smooth bed to macro-roughness","authors":"Mirco Mancini , Marianna Soler , Jordi Colomer , Luca Solari , Teresa Serra","doi":"10.1016/j.marpolbul.2025.118509","DOIUrl":"10.1016/j.marpolbul.2025.118509","url":null,"abstract":"<div><div>Recent research confirmed the significant role turbidity currents play in transporting microplastics (MPs) over long distances in aquatic environments. However, only a limited number of studies have specifically addressed the transport dynamics of microfibers (MFs). These synthetic fibers present unique challenges due to their distinctive physical characteristics, such as high aspect ratios, flexibility, and low densities compared to natural sediments, which influence their behavior, settling patterns, and environmental fate. Using lock-exchange flume experiments, this work examines how MFs of differing shapes and sizes are transported by turbidity currents traveling over different bedforms. Experiments were conducted in a flume under a wide range of bed layer conditions (from micro to macro-roughness) and water depths, to assess how these factors influence MF transport and deposition. Results indicate that both bed roughness and water depth significantly affect the inertial velocity of turbidity currents, thereby affecting the accumulation of suspended MFs as they propagate along the flume. Despite their tendency to settle, MFs were transported over greater distances within the flow, likely due to their alignment with the streamlines, particularly in the case of smaller diameters. For the first time, a non-dimensional model was developed to predict MF transport as a function of bed granulometry, MF settling velocity, water column height, and MF shape (characterized by the Corey Shape Factor). The findings provide valuable insights into the complex behavior of MFs in natural environments and lay the groundwork for further research on the fate of plastic pollution in aquatic systems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118509"},"PeriodicalIF":4.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Marine litter in mangrove soils of Roatán, Western Caribbean: Abundance, sources, and ingestion by an American crocodile (Crocodylus acutus) 西加勒比海Roatán红树林土壤中的海洋垃圾：丰度、来源和美洲鳄（Crocodylus acutus）的摄食

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-29 DOI: 10.1016/j.marpolbul.2025.118508

Zara Zuniga-Lopez , Lisa M. Erdle , Victoria M. Fulfer , Luis Flores , Gisselle Brady , Jesse C. Vermaire

{"title":"Marine litter in mangrove soils of Roatán, Western Caribbean: Abundance, sources, and ingestion by an American crocodile (Crocodylus acutus)","authors":"Zara Zuniga-Lopez , Lisa M. Erdle , Victoria M. Fulfer , Luis Flores , Gisselle Brady , Jesse C. Vermaire","doi":"10.1016/j.marpolbul.2025.118508","DOIUrl":"10.1016/j.marpolbul.2025.118508","url":null,"abstract":"<div><div>Mangrove forests in insular regions are increasingly exposed to marine litter, even within designated protected areas. These ecosystems provide key ecological services but remain vulnerable to pollution via solid waste accumulation. Caribbean mangroves, in particular, are underrepresented in global assessments. This study provides the first baseline of macrolitter accumulation in mangroves on Roatán Island, within the Bay Islands National Marine Park, Honduras.</div><div>We assessed: (1) the abundance and composition of macrolitter (≥5 cm) across four mangrove sites; (2) potential sources of macroplastics through brand and country-of-origin analysis of labeled items; and (3) the composition of litter ingested by an American crocodile (<em>Crocodylus acutus</em>) found near one site.</div><div>A total of 3417 litter items were collected across 20 quadrats, with an average concentration of 6.83 items m<sup>−2</sup>. Plastics dominated the litter, making up 98.7 % of all items. Only 2.4 % items had legible labels, most originating from Honduras and Guatemala. Among the subset of bottles with visible dates, the average age was 7 years, suggesting long-term retention within the mangrove environment. The deceased <em>C. acutus</em> found near one of the sites had ingested 62 litter items. A Principal Component Analysis revealed that the composition of ingested materials closely matched the litter profile of the nearby sampling site, indicating likely local exposure.</div><div>These findings confirm that mangroves act as long-term sinks for plastic and highlight risks to mangrove fauna. The presence of banned and foreign-sourced litter underscores poor enforcement and transboundary pollution. Coordinated regional policies, improved waste management, and targeted cleanup in protected ecosystems are urgently needed.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118508"},"PeriodicalIF":4.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The combined effects of aging polylactic acid microplastics and TCPP on the byssus genes of the mussel Mytilus coruscus 老化聚乳酸微塑料与TCPP对贻贝胸椎基因的联合影响

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-29 DOI: 10.1016/j.marpolbul.2025.118466

Li’ang Li , Dan Hu , Zhen Zhong , James Kar-Hei Fang , Menghong Hu , Yueyong Shang , Youji Wang

{"title":"The combined effects of aging polylactic acid microplastics and TCPP on the byssus genes of the mussel Mytilus coruscus","authors":"Li’ang Li , Dan Hu , Zhen Zhong , James Kar-Hei Fang , Menghong Hu , Yueyong Shang , Youji Wang","doi":"10.1016/j.marpolbul.2025.118466","DOIUrl":"10.1016/j.marpolbul.2025.118466","url":null,"abstract":"<div><div>Polylactic acid (PLA), despite its biodegradability, readily degrades into aging microplastics (MPs) in marine environments, while tris(1-chloro-2-propyl) phosphate (TCPP), a representative organophosphorus flame retardant (OPFR), emerges as a concerning marine pollutant. To evaluate their combined effects and ecological risks, mussels were exposed to PLA (both virgin and aging at 0.2 and 1 mg/L), TCPP (0.5 μg/L) and their combination for 14 days, and the gene expressions related to byssus in PLA, aging PLA, TCPP, TCPP + PLA, TCPP + aging PLA treatment were analyzed. Exposed to 1 mg/L aging PLA or 0.5 μg/L TCPP alone suppressed the gene expression related to byssal plaque, respectively. Moreover, the combined effects of aging PLA and TCPP on byssus increased with increasing PLA concentration. Our study emphasizes that, aging would still enhance the ecotoxicity of MPs, even though they are biodegradable. Greater attention should be paid to the risks of PLA in the future.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118466"},"PeriodicalIF":4.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PCB contamination in commercial clams from the North Portuguese Atlantic Coast, the North Sea, and Vietnam: An assessment of potential carcinogenic risks to human health 北葡萄牙大西洋沿岸、北海和越南的商业蛤中多氯联苯污染：对人类健康的潜在致癌风险评估

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-29 DOI: 10.1016/j.marpolbul.2025.118484

Cassiopée Remfort-Aurat , Ana Margarida Esteves , Eduardo Rocha , Maria João Rocha

{"title":"PCB contamination in commercial clams from the North Portuguese Atlantic Coast, the North Sea, and Vietnam: An assessment of potential carcinogenic risks to human health","authors":"Cassiopée Remfort-Aurat , Ana Margarida Esteves , Eduardo Rocha , Maria João Rocha","doi":"10.1016/j.marpolbul.2025.118484","DOIUrl":"10.1016/j.marpolbul.2025.118484","url":null,"abstract":"<div><div>This study investigates the presence of persistent organic pollutants (POPs), specifically polychlorinated biphenyls (PCBs), in edible clams from the North Atlantic Ocean (Portugal and North Sea coastlines) and the South China Sea (Vietnam), available in Portuguese supermarkets. The study unveils the average PCB concentrations in clams, with European specimens containing 64.4 μg/kg wet weight (ww) and Vietnamese having 35.6 μg/kg ww. Both values fall below the European threshold of 75 μg/kg ww, indicating low immediate health risks. However, the study also estimates the daily intake of PCBs, raising concerns about long-term health risks. Moreover, all measured PCB values exceed the international lifetime cancer risk safety limit, with European clams showing a higher cancer risk (1.0E−05) compared to the Vietnamese clams (7.4E−06). The sources of contamination are linked to industrial zones, including oil facilities and recycling plants, particularly in Western Europe, highlighting the need for continuous environmental monitoring.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118484"},"PeriodicalIF":4.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highway runoff and recreational activities as primary sources of microplastics in the watershed of the SW Atlantic Mar Chiquita coastal lagoon (MAB-UNESCO) 公路径流和娱乐活动是西南大西洋奇基塔海岸泻湖流域微塑料的主要来源（MAB-UNESCO）

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-29 DOI: 10.1016/j.marpolbul.2025.118478

María Florencia Silva-Barni , Mariana Gonzalez , María Soledad Islas , Mauricio Díaz-Jaramillo

{"title":"Highway runoff and recreational activities as primary sources of microplastics in the watershed of the SW Atlantic Mar Chiquita coastal lagoon (MAB-UNESCO)","authors":"María Florencia Silva-Barni , Mariana Gonzalez , María Soledad Islas , Mauricio Díaz-Jaramillo","doi":"10.1016/j.marpolbul.2025.118478","DOIUrl":"10.1016/j.marpolbul.2025.118478","url":null,"abstract":"<div><div>Plastic waste pollution is one of the most significant global challenges today, and it is urgent to reduce, mitigate, and assess its levels in various environmental matrices and priority areas. Coastal aquatic environments act as sink areas, where the watershed collector effect could lead to microplastic deposition. The Mar Chiquita coastal lagoon (Mch, Buenos Aires, Argentina) lies within a protected area receiving water from a 10,000 km² watershed with diverse land uses. This study aims to determine the occurrence and abundance of microplastics (0.1-5 mm) in surface sediments from 18 sampling sites, including the upper, middle, and lower basin areas, as well as sites within the coastal lagoon. Microplastics were extracted using a high-density solution (>1.6 g/cm<sup>3</sup>), counted, and categorized by type, shape, size, and chemical composition. Results showed total microplastic abundances ranging from 0 to 2468 items per kilogram of dry weight. The higher abundance trends were associated with areas of high traffic and human settlement, specifically in streams and the coastal lagoon, respectively. Common thermo/duroplastics particles (MPs; 5-100%) and tire wear particles (TWPs; 0-95%) represented the main microplastic groups observed in the Mch basin, while Paint particles (Pps) contribution was lower (0-15%). MPs were predominantly composed of polyethylene terephthalate (32%) and polyethylene (24%), while TWPs mainly consisted of polyisoprene and polybutadiene, and PPs were primarily associated with epoxy resins or acrylic paints. This work represents the first baseline assessment of microplastic pollution in the sediments of this priority conservation area on the southwestern Atlantic coast.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118478"},"PeriodicalIF":4.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copper isotope ratios in oysters from the French Mussel Watch program confirm antifouling paints as a major source of copper in Arcachon Bay 来自法国贻贝观察项目的牡蛎中的铜同位素比率证实，防污涂料是阿卡孔湾铜的主要来源

IF 5.3 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-28 DOI: 10.1016/j.marpolbul.2025.118503

Daniel F. Araújo

{"title":"Copper isotope ratios in oysters from the French Mussel Watch program confirm antifouling paints as a major source of copper in Arcachon Bay","authors":"Daniel F. Araújo","doi":"10.1016/j.marpolbul.2025.118503","DOIUrl":"10.1016/j.marpolbul.2025.118503","url":null,"abstract":"<div><div>The ratio of copper stable isotopes (<sup>65</sup>Cu/<sup>63</sup>Cu, expressed as δ<sup>65</sup>Cu) in bivalves offers a promising tool to identify coastal anthropogenic sources, yet its reliability remains uncertain. This study examines Cu isotopes in oyster samples from the chronically Cu-contaminated Arcachon Bay across three stations over a four-decade period. Cu concentrations rose significantly at nearshore stations, with a smaller increase at the offshore site. δ<sup>65</sup>Cu values increased alongside Cu levels, consistent with a binary mixing between natural and anthropogenic Cu derived from antifouling paints. This finding confirms that antifouling paints are the major local anthropogenic source of Cu and demonstrates that Cu isotopes are an effective tool for tracking these compounds in coastal environments. Further investigation of additional compartments and the integration of new isotope systems can better constrain diffuse secondary inputs—such as riverine, atmospheric, and runoff—and refine source apportionment in coastal areas, like Arcachon.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118503"},"PeriodicalIF":5.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seagrass as a stabilizing environment for benthic foraminifera living in anthropogenically impacted coastal areas 在人为影响的沿海地区，海草作为底栖有孔虫生存的稳定环境

IF 5.3 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-28 DOI: 10.1016/j.marpolbul.2025.118506

Yahel Eshed , Gidon Winters , Gilad Antler , Sigal Abramovich , Sarit Ashckenazi-Polivoda

{"title":"Seagrass as a stabilizing environment for benthic foraminifera living in anthropogenically impacted coastal areas","authors":"Yahel Eshed , Gidon Winters , Gilad Antler , Sigal Abramovich , Sarit Ashckenazi-Polivoda","doi":"10.1016/j.marpolbul.2025.118506","DOIUrl":"10.1016/j.marpolbul.2025.118506","url":null,"abstract":"<div><div>In tropical regions, seagrass meadows provide a unique habitat for benthic foraminifera, both serving as important ecosystem engineers and sensitive indicators of coastal marine ecosystems. However, their interactions remain poorly understood, particularly in the context of anthropogenic pressures and climate change. This study investigates benthic foraminiferal assemblages associated with the tropical seagrass <em>Halophila stipulacea</em> in the Gulf of Aqaba-Eilat (GoA) as a model system to monitor natural and anthropogenic changes. Sampling was conducted during 11 campaigns (January 2020–April 2021) at two sites: South Coast (SC), a pristine shoreline, and North Coast (NC), an urbanized area. At each site, samples were collected from three distinct environments: seagrass leaves (L), sediments within meadows (SIM), and sediments outside meadows (SOM).</div><div>Throughout all of the sampling period, we found higher abundance and diversity of benthic foraminifera in sediments within <em>H. stipulacea</em> meadows (SIM) compared with sediments outside meadows (SOM). These results demonstrate that <em>H. stipulacea</em> creates a favorable environment for benthic foraminifera compared to adjacent bare sediments. Notably, the occurrence of certain foraminiferal species in the GoA is directly linked to the presence of seagrass. The leaves also serve as nurseries for juvenile <em>Amphistegina</em>, a key cosmopolitan symbiont-bearing genus. Additionally, the seagrass meadows appear to mitigate anthropogenic impacts, maintaining “healthy” foraminiferal assemblages even in the urbanized northern region of the GoA (NC). These findings highlight the ecological importance of seagrass meadows for benthic foraminifera and emphasize their susceptibility to anthropogenic stressors.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118506"},"PeriodicalIF":5.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of flooding events on microplastic distribution from rivers to coastal areas: a case study from Tuticorin, Southeast India 洪水事件对微塑料从河流到沿海地区分布的影响：以印度东南部图蒂哥林为例

IF 4.9 3区环境科学与生态学

Marine pollution bulletin Pub Date : 2025-07-28 DOI: 10.1016/j.marpolbul.2025.118471

Jamila Patterson , K. Immaculate Jeyasanta , M. Narmatha Sathish , Andy M. Booth , R.L. Laju , V. Glen Emeralda , Bakan Jagdish Sudhakar

{"title":"Impact of flooding events on microplastic distribution from rivers to coastal areas: a case study from Tuticorin, Southeast India","authors":"Jamila Patterson , K. Immaculate Jeyasanta , M. Narmatha Sathish , Andy M. Booth , R.L. Laju , V. Glen Emeralda , Bakan Jagdish Sudhakar","doi":"10.1016/j.marpolbul.2025.118471","DOIUrl":"10.1016/j.marpolbul.2025.118471","url":null,"abstract":"<div><div>Extreme weather events driven by climate change may significantly impact the fate and transport of particulate pollutants in the environment. This study investigates the impact of the 2023 flood event on microplastic (MP) distributions in the Thamirabarani River, through the Punnakayal estuary and into the coastal waters of the Bay of Bengal. The flood significantly increased MP abundance and diversity, indicating that such events mobilize MPs from sediments to surface waters and transport terrestrial MPs into aquatic systems. The mean abundance of MPs across all water samples was 28.29 ± 12.29 items/L before the flood and 95.14 ± 21.13 items/L after the flood, a 3-fold increase. In sediments, it was 36.14 ± 16.78 items/kg before the flood and 54.71 ± 27.74 items/kg after the flood, a 1.5-fold increase. The abundance of smaller MPs (<0.5 mm, 0.5–1 mm, and 1–2 mm) increased significantly in post-flood water samples at all sites, while no clear pattern emerged for sediments. Post-flood, there was a significant increase in the number of fiber (ca. 425 %), fragment (230 %), foam (450 %) and film-type MPs (650 %) in water samples from most sites, with a significant increase in foam (530 %) and film-type MPs (450 %) in sediments at most sites. FTIR-ATR analysis revealed 7 polymer types pre-flood and 16 post-flood, which included an additional 9 not previously identified. Mangroves can trap MP flowing through estuarine regions, while hydrodynamic factors impact MP retention in the coastal area. This study aids in understanding flood-related MP redistribution, helping to improve pollution management.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"Article 118471"},"PeriodicalIF":4.9,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0