Marine pollution bulletin最新文献

{"title":"Spatiotemporal distributions of total and methylmercury in bivalves from coastal zones of South Korea.","authors":"Haein Yu, Geonwoo Park, Chul-In Sun, Yong Hwa Oh, Yong-Woo Lee","doi":"10.1016/j.marpolbul.2025.118472","DOIUrl":"10.1016/j.marpolbul.2025.118472","url":null,"abstract":"<p><p>We measured the concentrations of total mercury (THg) and methylmercury (MeHg) in bivalves (mussels and oysters) collected from 46 sites in coastal zones of Korea in 2019 and 2020. THg and MeHg concentrations in bivalves ranged from 1.6 to 41.7 μg kg^-1 and 0.8 to 26.4 μg kg^-1, respectively. On average, MeHg accounted for more than about 50 % of THg showing a strong, positive, and significant correlation (r = 0.86, p < 0.001) with THg. The concentrations of THg in all samples were below the permissible threshold (< 500 μg kg^-1; the Korea Ministry of Food and Drug Safety) for shellfish, whereas some sites near industrial facilities showed relatively higher Hg levels compared to non-industrial areas. The calculated provisional tolerable weekly intake indicated that THg and MeHg levels in bivalves were not significantly high concerning human health.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"220 ","pages":"118472"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144690677","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}

{"title":"Chronic toxicity after the oil spill on the Brazilian coast based on ecotoxicological biomarkers in the reef fish Stegastes fuscus (Cuvier, 1830).","authors":"Maria Karolaine de Melo Alves, Célio Freire Mariz, Shaieny Marcela Ventura Dos Santos, João Victor Gomes Nascimento, Thalita Joana Bezerra de Melo, Natallia Vivian da Silva Maia, Romulo Nepomuceno Alves, Eliete Zanardi-Lamardo, João Lucas Leão Feitosa, Mônica Lúcia Adam, Paulo S M Carvalho","doi":"10.1016/j.marpolbul.2025.118487","DOIUrl":"10.1016/j.marpolbul.2025.118487","url":null,"abstract":"<p><p>The Brazilian coast was affected by crude oil in 2019 that contaminated coral reef areas. Oil Polycyclic aromatic hydrocarbons (PAHs) are responsible for triggering sublethal toxicity in fish. This study aimed to evaluate chronic effects and recovery of the keystone damselfish Stegastes fuscus after exposure to crude oil in October 2019. Fish were sampled from seven oil affected reef areas and one non-affected, 17, 24 and 34 months after the oil spill. Analysis of biliary PAHs, biochemical and genotoxic biomarkers were carried out. Biliary PAHs in fish from Paiva and Suape areas were significantly reduced 17 months after the oil spill. Biliary PAHs and ethoxyresorufin-O-deethylase (EROD) activity in fish sampled from Janga, Paiva, Suape, Serrambi, Carneiros and Mamucabas reefs were higher than in specimens from Cupe reference area. Male and immature individuals presented higher activities than females for EROD, Glutathione S-transferase and catalase and lower values for superoxide dismutase and glutathione. Increased micronuclei frequencies were observed in Paiva, Suape, Serrambi and Carneiros samples. The results indicate that these reef areas are not being influenced by the 2019 oil spill. Contamination by PAHs occurs chronically in these locations such as the urbanized Janga reef area, where the highest bile PAH concentrations and EROD induction were detected. The integrated index of biomarker responses indicated changes in biochemical biomarkers in all reef areas related to Cupe, possibly reflecting exposure to other unmeasured contaminants. Continued monitoring with the species Stegastes fuscus is necessary to obtain information on the contamination status of these environments over the years.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"220 ","pages":"118487"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144707973","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}

{"title":"Screening pollution biomarkers and burrowing population profiles in an infaunal key species from port estuarine areas: What does deeper sediment say?","authors":"M Díaz-Jaramillo, M L Ballesteros, G Chiang, C N Pegoraro, M Diniz","doi":"10.1016/j.marpolbul.2025.118773","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2025.118773","url":null,"abstract":"","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 Pt 2","pages":"118773"},"PeriodicalIF":4.9,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145244768","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}

{"title":"Microplastic exposure reshapes the virome and virus-bacteria networks with implications for immune regulation in Mytilus coruscus.","authors":"Jingyan Zhang, Xiaoya Wang, Qingyang Li, Bin Li, Haiping Ma, Shijie Wang, Qianwen Ying, Suzhen Ran, Ekaterina O Leonteva, Mikhail B Shilin, Yingying Ye, Xiangli Dong, Hongfei Li","doi":"10.1016/j.marpolbul.2025.118785","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2025.118785","url":null,"abstract":"<p><p>Microplastic pollution has emerged as a critical environmental concern, yet its impacts on host-associated viral communities and immune balance in marine bivalves remain largely unexplored. In this study, Mytilus coruscus individuals were exposed to microplastics in situ for seven days. Virome sequencing and bioinformatic analyses revealed that microplastic exposure induced divergent responses in DNA and RNA viral communities. DNA viromes exhibited suppressed diversity and downregulation of core viral metabolic pathways, potentially reflecting reduced viral replication capacity under host immune stress. In contrast, RNA viromes displayed metabolic activation and functional shifts, including enriched glycan and nucleotide metabolism, possibly linked to enhanced viral activity or immune evasion. Phage-bacteria interaction networks were also restructured, showing increased associations with opportunistic pathogens such as Vibrio cholerae and Enterobacter, potentially affecting immune surveillance. Furthermore, the expression of antibiotic resistance genes (ARGs) in viral genomes was differentially regulated, suggesting pollutant-induced microbial selection that may challenge host immune resilience. These findings suggest that microplastics not only reshape virome composition and metabolic functions but also influence virus-mediated immune interactions, with important implications for disease susceptibility and immune homeostasis in filter-feeding shellfish.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 Pt 2","pages":"118785"},"PeriodicalIF":4.9,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145244837","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}

{"title":"Denitrification in Hangzhou Bay: The role of nutrient dynamics in a tidal and human-impacted estuarine system.","authors":"Yuang Guo, Xue Wu, Yangjie Li, Bin Wang, Zhi Yang, Menglu Li, Yixing Zhang, Xin Zhao, Weifang Gu, Zhihao Xu, Hongliang Li, Jianfang Chen","doi":"10.1016/j.marpolbul.2025.118783","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2025.118783","url":null,"abstract":"<p><p>Denitrification is a key pathway of nitrogen removal in estuarine ecosystems, yet its regulation is shaped by complex interactions between environmental conditions and human activities. In semi-enclosed estuaries like Hangzhou Bay, long hydraulic retention times and sustained nitrogen inputs from upstream sources have intensified eutrophication, posing significant ecological pressures. Field surveys revealed clear spatial and seasonal variability in denitrification rates, ranging from less than 2.5 ng N g^-1 h^-1 in March to more than 5 ng N g^-1 h^-1 in June. To identify the drivers of this variability, we combined field observations with statistical modeling. Nitrate (NO₃^-) emerged as the primary predictor of denitrification, underscoring its pivotal role as a substrate for denitrifying microorganisms, while temperature emerged as a secondary driver, controlling microbial activity through seasonal fluctuations. Sensitivity analyses confirmed the dominant influence of NO₃^- and temperature, but a negative correlation between NO₃^- and denitrification rate suggests that nitrogen excess in Hangzhou Bay results from limited removal efficiency rather than the substrate scarcity. These findings illuminate the complex interplay between anthropogenic nutrient inputs and natural hydrodynamic processes, providing new insights into nitrogen cycling in estuarine environments and supporting the development of management strategies to mitigate eutrophication and strengthen ecosystem resilience.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 Pt 2","pages":"118783"},"PeriodicalIF":4.9,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145244795","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}

{"title":"Isolation of asphaltene-tolerant microbial strains from North Saskatchewan river sediment and evaluation of their interaction mechanisms with asphaltenes.","authors":"Nayereh Saborimanesh","doi":"10.1016/j.marpolbul.2025.118725","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2025.118725","url":null,"abstract":"<p><p>Oil spills in freshwater pose environmental, social, and economic challenges. The mobility of spilled oil in flowing water and its strong association with sediments leave behind hydrocarbons that can persist in the sediment long after a spill. While recent research has focused on the immediate effects of diluted bitumen spills, less is known about the impact of heavy fractions of bitumen, particularly asphaltenes (Asp) on sediments, and the key microbial taxa involved in their degradation. This study aimed to evaluate how deposited Asp, as the external carbon source, influences sediment microbial community dynamics, isolate and identify asphaltene-tolerant microbial taxa, and investigate the interactions between these taxa and Asp. Sediments from the North Saskatchewan River were incubated with Asp for over 100 days. Analysis of the water overlaying Asp-sorbed sediment revealed hydrocarbon leaching and elevated concentrations of sulfate and nitrogen species in Asp-exposed treatments, suggesting solubilization of Asp components into the water. Culture-based methods and 16S rRNA gene sequencing revealed a shift from a Pseudomonas-dominated microbial community in unexposed sediment to Asp-tolerant species, such as Roseateles aquatilis, Sphingopyxis chilensis, and Methylobacterium thiocyanatum. R. aquatilis survived and proliferated with Asp as the external carbon source over the exposure period and exhibited strong adhesion to Asp, driven by its high cell surface hydrophobicity, whereas the other strains show no direct interaction with Asp. The findings highlight the potential role of R. aquatilis in natural bioremediation processes of asphaltene-contaminated freshwater sediments.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 Pt 2","pages":"118725"},"PeriodicalIF":4.9,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145244816","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}

{"title":"Evaluation and characterization of microplastics in beach sand from three different Syrian coastal locations","authors":"Abdul W. Allaf ,&nbsp;Ali Alzier ,&nbsp;Mohammed Amer Moughrabia ,&nbsp;Mazen Ibrahim ,&nbsp;Ghina Alssayes ,&nbsp;Shahd Adriby ,&nbsp;Abdul G. Al Lafi","doi":"10.1016/j.marpolbul.2025.118797","DOIUrl":"10.1016/j.marpolbul.2025.118797","url":null,"abstract":"<div><div>Microplastics (MPs) pollution is a significant environmental problem of increasing potential consequences for ecosystem health. The present work represents the first study to evaluate the occurrence of MPs particles on Syrian beaches, covering four coastal locations namely, Tartous (Golden sand and Albasira), Lattakia (Blue coast), and Baniyas (Musfat Baniyas). MPs were extracted from sand using density separation (NaCl, 1.2 g mL⁻¹) and enzymatic digestion (Protease) was carried out to ensure that MPs were free of organic materials. Fluorescence microscopy with Nile Red staining was used to detect and count MPs, while attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and scanning electron microscopy (SEM) were used to identify their polymer types and compositions as well as their surface morphology. The total MPs concentrations in the four different locations varied from 0.22 ± 0.12 to 17.8 ± 5.0 items kg⁻¹ of dry sand with sizes classified into 0.3–1 mm and 1–5 mm fractions. Low-density polyethylene (LDPE), polypropylene (PP), and oxidized polyethylene were identified as the main constituents of the MPs samples. The findings reveal that Syrian beaches are already affected by MPs contamination, with variation linked to local human activity. Given the dependence of Syrian coastal communities on fisheries, tourism, and industrial activities, these results underline the urgent need for national monitoring programs, improved waste management policies, and regional cooperation in the Eastern Mediterranean. This baseline study therefore provides critical scientific evidence to support both environmental policy and future research on marine pollution in Syria.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 ","pages":"Article 118797"},"PeriodicalIF":4.9,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220020","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}

{"title":"Estimating gear efficiency of toothed fishing dredge for collecting seafloor litter","authors":"Zijiang Yang ,&nbsp;Ren Soejima ,&nbsp;Daisuke Shiode ,&nbsp;Tadashi Tokai","doi":"10.1016/j.marpolbul.2025.118782","DOIUrl":"10.1016/j.marpolbul.2025.118782","url":null,"abstract":"<div><div>In this study, depletion experiments using a toothed fishing dredge were conducted to estimate the gear efficiency for collecting seafloor litter in a nearshore area on the north side of Tokyo Bay. Using the catch data of cod-end samples and gear-entangled samples, four models (Leslie-Davis model, DeLury model, normal patch model, and negative binomial patch model) were applied to fit the dataset. Analysis of the collected seafloor litter showed that plastics were the dominant category, accounting for 61.8–90.0 % by count (depending on whether the sample was from the cod-end or gear entanglement), with polyethylene (PE) as the predominant polymer type (50.5 %). Cross-validation identified the normal patch model as the most appropriate model for inference, yielding a gear efficiency estimate of 34.8 % and a corresponding seafloor litter abundance of 4000 pieces/km² based on cod-end samples. Compared to conventional methods that assume 100 % gear efficiency, this suggests that seafloor litter abundance is underestimated by 38.6 % and 79.4 % given current experimental conditions. When all litter samples were included, i.e., both cod-end samples and gear-entangled samples, the estimated gear efficiency was 18.7 %, with a corresponding seafloor litter abundance of 45,200 pieces/km². This suggests that excluding gear-entangled litter, mainly plastic sheet fragments from bags, can result in underestimation by as much as 91 %. These findings highlight the importance of accounting for gear efficiency and incorporating all gear-collected litter in bottom-towed surveys to more accurately assess seafloor litter pollution.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 ","pages":"Article 118782"},"PeriodicalIF":4.9,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220026","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}

{"title":"Disease outbreaks substantially enhance greenhouse gas emissions from Asian seabass (Lates calcarifer) aquaculture pond","authors":"Han-Yang Yeh ,&nbsp;Chien-Wei Tu ,&nbsp;Yi-Jung Chen ,&nbsp;Wen-Ping Cheng ,&nbsp;Pei-Yu Shih ,&nbsp;Chia-Chia Yu ,&nbsp;Wei-Sheng Zhang ,&nbsp;Wei-En Hung ,&nbsp;Yu-Ru Lin ,&nbsp;Zhen Hao Liao ,&nbsp;Wen-Chen Chou ,&nbsp;Hsiao-Chun Tseng ,&nbsp;Ruei-Feng Shiu ,&nbsp;Fan-Hua Nan ,&nbsp;Meng-Chou Lee","doi":"10.1016/j.marpolbul.2025.118788","DOIUrl":"10.1016/j.marpolbul.2025.118788","url":null,"abstract":"<div><div>Asian seabass (<em>Lates calcarifer</em>) is a globally important aquaculture species. Rising demand for food has driven the development of high-density and intensive farming systems. However, these practices have also heightened the risk of disease outbreaks, which now represent a major challenge for the aquaculture industry. Notably, little is known about greenhouse gas (GHG) flux dynamics during seabass culture, particularly under disease outbreak conditions. In this study, we monitored a traditional earthen pond, measuring CO₂, CH₄, and N₂O fluxes with environmental parameters. A giant seaperch iridovirus (GSIV) outbreak occurred between June and July, causing mortality of at least 30 % of the fish stock. Our analysis showed that CO₂ emissions during the outbreak increased dramatically, reaching 15 times the levels observed under normal conditions (45.33 ± 28.05 g m⁻² day⁻¹), whereas CH₄ (10.35 ± 8.30 mg m⁻² day⁻¹) and N₂O (3.23 ± 0.74 mg m⁻² day⁻¹) fluxes did not show significant changes. In the later culture stages, however, elevated concentrations of CH₄ (46.56 ± 33.43 nM) and N₂O (233.73 ± 126.54 nM) accumulated in the water, and under strong wind conditions, pronounced flux peaks of CH₄ (74.98 ± 73.73 mg m⁻² day⁻¹) and N₂O (27.02 ± 34 mg m⁻² day⁻¹) were observed. Using the GWP₁₀₀ values from the IPCC AR6 report, the average GHG flux across the culture period was estimated at 10.09 ± 9.03 g CO₂-eq m⁻² day⁻¹, confirming that seabass ponds acted as net sources of greenhouse gases. These findings highlight disease outbreaks as amplifiers of GHG emissions and stress that improved disease control is vital for both productivity and mitigation.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 ","pages":"Article 118788"},"PeriodicalIF":4.9,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219964","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}

{"title":"Emerging challenges of microplastic impacts to ecological health and climate change","authors":"Minh-Ky Nguyen ,&nbsp;Tony R. Walker ,&nbsp;Chitsan Lin ,&nbsp;D. Nguyen ,&nbsp;Sung Su Kim ,&nbsp;Woojin Chung ,&nbsp;D. Duc Nguyen","doi":"10.1016/j.marpolbul.2025.118778","DOIUrl":"10.1016/j.marpolbul.2025.118778","url":null,"abstract":"<div><div>Microplastics (MPs) pose a serious environmental hazard, contributing to pollution and potentially impacting greenhouse gas (GHG) emissions and climate change trends. This study addresses this critical gap by conducting a comprehensive review of existing literature to consolidate current knowledge on the ecological and climatic challenges posed by MPs. Through this review, we find that MPs alter microbial processes, disrupt biogeochemical cycles, and promote GHG release through degradation and ecosystem interactions. The review highlights that MPs not only impact biodiversity and ecosystem health, but also exacerbate climate change by influencing carbon cycling, photosynthetic dynamics in phytoplankton, and atmospheric processes. However, knowledge gaps remain regarding the mechanisms linking MPs to GHG emissions and long-term ecosystem impacts. Our findings emphasize the urgent need for systematic research, standardized methodologies, and integrated policy strategies to mitigate the dual threats of plastic pollution and climate change.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"222 ","pages":"Article 118778"},"PeriodicalIF":4.9,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220019","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}