Marine pollution bulletin最新文献

{"title":"Biological mediation of microplastic aggregation and sedimentation by a harmful dinoflagellate Prorocentrum minimum in a simulated marine environment","authors":"Kavindu Dhananjaya Sudusinghe ,&nbsp;Young Kyun Lim ,&nbsp;Sang Hee Hong ,&nbsp;Sang Soo Baek ,&nbsp;Seung Ho Baek","doi":"10.1016/j.marpolbul.2026.119227","DOIUrl":"10.1016/j.marpolbul.2026.119227","url":null,"abstract":"<div><div>Coastal estuaries are hotspots of microplastics (MPs) and harmful algal blooms (HABs), yet the role of dinoflagellates in MP sinking remains unclear. We examined aggregate formation between <em>Prorocentrum minimum</em> and polyethylene (PE; 1.0 and 1.4 g cm⁻³, 10–20 μm) and polypropylene (PP; 0.91 g cm⁻³, 45–75 μm) using roller–shaker incubations. Growth, aggregate morphology, sinking velocity, and stability were evaluated microscopically and statistically. <em>P. minimum</em> growth was not inhibited by MPs; PE treatments showed significantly higher biomass than controls during exponential and stationary phases (<em>p</em> &lt; 0.05). Aggregates appeared by Day 10 and progressively incorporated MPs and thecal fragments. The sinking ratio of PE1.0 particles increased to ∼22 % (R² = 0.96, <em>p</em> &lt; 0.05), whereas PP showed negligible sedimentation (&lt;1 %). Sinking velocities rose from 0.38 mm s⁻¹ (Day 10) to 0.76 mm s⁻¹ (Day 16; <em>p</em> &lt; 0.05), then declined to 0.66 mm s⁻¹ by Day 31 despite larger sizes. This deviation from Stokes' law was linked to cellulose thecal plates reducing density and cohesion. Principal component analysis (PCA; PC1 = 53.9 % variance) associated sinking velocity with aggregate area, while PC2 (22.9 %) showed theca abundance negatively influenced velocity. Long-term incubations under cold, dark conditions (&gt;70 days) showed no resuspension. These findings indicate thecate morphology limits MP export efficiency compared to extracellular polymeric substances (EPS)-rich raphidophytes. Nonetheless, scaling suggests <em>Prorocentrum</em> blooms may export on the order of 10¹⁰ MPs annually, highlighting species-specific traits as critical regulators of MP vertical flux and fate in coastal ecosystems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119227"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145948800","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":"Characterization of the submarine disposal of a Bayer effluent (Gardanne alumina plant, southern France): V: Evolution of metal and metalloid concentrations in the seawater column of the discharge area (Mediterranean Sea) from 2016 to 2024","authors":"Stéphanie Jacquet ,&nbsp;Christophe Monnin ,&nbsp;Deborah Mille ,&nbsp;Olivier Herlory ,&nbsp;Stéphane Mounier ,&nbsp;Aurélie Dufour ,&nbsp;Lauralie Callens ,&nbsp;Jean-Marc Feuerstein ,&nbsp;Deny Malengros ,&nbsp;Ana-Marija Cindric ,&nbsp;Dario Omanovic","doi":"10.1016/j.marpolbul.2026.119261","DOIUrl":"10.1016/j.marpolbul.2026.119261","url":null,"abstract":"<div><div>This study examined the evolution of trace metal and metalloid concentrations in the Cassidaigne canyon water column (Mediterranean Sea), at the Gardanne alumina plant discharge area, between 2016 and 2024. Following the 2015 ban on solid waste discharge, the plant progressively switched to the discharge at sea of a regulatory clarified effluent, resulting from filter-presses, CO₂ treatment and biological unit implementations. Several anomalies in element concentrations at discrete depths in the water column above the outfall (station L1) reflected local environmental influences, such as submarine groundwater discharges and lithogenic inputs, including mistral-induced upwelling, remobilizing sediment. From 2016 to 2021, Al concentrations below 200 m depth resulted from the effluent-seawater mixing (the plume) and subsequent metals and metalloids removal and/or release during hydrotalcite particles formation and dissolution. Concretions at the outfall of the effluent (330 m depth) stopped forming after introduction of the CO₂ treatment of the effluent in 2018. Despite occasional biological treatment disruptions leading to increased Al, V, and Cu concentrations at sea in 2020 and 2021, the effluent's chemical footprint remained globally confined in the first hundred meters above the outfall, without broader upper water column impact. Deep Al anomalies at a distant site (station K) in the canyon axis also indicated potential local remobilization from legacy bauxite deposits. Overall, both the plume and the historical residues appeared as localized but distinct sources of contamination. Particular renewed attention emerged from monitoring committees regarding ancient deposits, the spatial extent of which in the canyon far exceeds the chemical footprint of the effluent.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119261"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979270","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":"Atmospheric deposition as a pathway for microplastic transport to the marine environment: Temporal variation and environmental factors","authors":"Youna Cho ,&nbsp;Andrew Loh ,&nbsp;Won Joon Shim ,&nbsp;Gi Myung Han ,&nbsp;Sung Yong Ha ,&nbsp;Sang Hee Hong","doi":"10.1016/j.marpolbul.2025.119189","DOIUrl":"10.1016/j.marpolbul.2025.119189","url":null,"abstract":"<div><div>Although understanding microplastic transport from terrestrial to marine environments presents a significant challenge, studies on their temporal variation in atmospheric deposition are lacking. This study investigated an intra–annual variation in the amount and characteristics of atmospheric microplastic deposition in an urbanized coastal bay, Masan Bay, and estimated its annual input load to the bay. Additionally, we explored the relationships between atmospheric deposition and various environmental factors. The average deposition rate of microplastic was 75.4 ± 29.2 n/m²/day, with an estimated annual input of 1.94 trillion particles into the bay. The deposition rate showed a significant negative correlation with temperature, reflecting seasonal variations. The microplastic deposition rate increased in spring and winter due to winds blowing from inland areas, while it decreased in summer under the influence of winds blowing from the oceanic regions. The deposition rate was significantly positively correlated with fine particulate matter (PM_2.5), which is predominantly associated with anthropogenic emissions in urban areas. This study highlights that a significant amount of microplastic can enter the marine environment via atmospheric transport, which supports the notion that atmospheric deposition is a crucial pathway for microplastics. The transport of air masses across urbanized areas in South Korea combined with the predominance of fragment–type microplastics in atmospheric deposits–consistent with patterns observed in other environmental media within the country–suggests that microplastics deposited in the coastal bay predominantly originate from intense anthropogenic activity in domestic urban areas.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119189"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917768","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":"Multi-omics reveal the prevalence of Thaumarchaeota and their biogeochemical roles in coastal low oxygen zones","authors":"Yu Han ,&nbsp;Airui Wang ,&nbsp;Zhijie Zhang ,&nbsp;Le Liu ,&nbsp;Quanrui Chen ,&nbsp;Wei Fan ,&nbsp;Ehui Tan ,&nbsp;Kai Tang","doi":"10.1016/j.marpolbul.2026.119293","DOIUrl":"10.1016/j.marpolbul.2026.119293","url":null,"abstract":"<div><div>The intensification of coastal hypoxia under anthropogenic eutrophication and climate change necessitates understanding microbial adaptive mechanisms. However, the composition of microbial communities and their biogeochemical roles in response to oxygen gradients remain poorly understood. Here, we employed ‌integrated multi-omics‌ approaches to analyze microbial communities and their biogeochemical functions across oxic to low oxygen gradients off the Yangtze River Estuary in East China Sea. Results revealed that surface oxic waters hosted phytoplankton (<em>Synechococcus</em>) and opportunistic bacteria (Flavobacteriia, Pelagibacterales), while bottom layers enriched chemolithoautotrophs (Thaumarchaeota, Nitrospina) and facultative anaerobes (Planctomycetes, Marine Group II), with sediment resuspension further amplified particle-attached taxa. Meanwhile, a remarkable shift in microbial nitrogen metabolism was observed between oxic and low oxygen waters, with dissolved nitrogen assimilation dominated in oxic waters. Despite genomic potential for complete nitrogen reduction in low oxygen waters, our metaproteomics revealed only a significant expression of nitrate reductases. This decoupling between genomic potential and proteomic expression implies that ambient oxygen levels remain above thresholds for full pathway activation, showcasing microbial metabolic plasticity. Both metagenomic and metaproteomic have confirmed that Thaumarchaeota, particularly the genus <em>Nitrosopumilus</em>, emerged as keystone taxa, contributing to nitrification and dark carbon fixation, thereby coupling nitrogen‑carbon biogeochemical cycling in coastal hypoxic zones. These findings highlight redox-driven microbial niche differentiation and metabolic adaptation, providing predictive insights into biogeochemical feedbacks under expanding coastal deoxygenation.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119293"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001421","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":"Dominance of cellulosic and synthetic microfibers in upper layers of the Atlantic Ocean: evidence from the Vendée globe 2020 race","authors":"Maria El Rakwe ,&nbsp;Bénédicte Morin ,&nbsp;Lena Thomas ,&nbsp;Victor Burger ,&nbsp;Edgar Dusacre ,&nbsp;Florence Mazeas ,&nbsp;Fabrice Amédéo ,&nbsp;Catherine Dreanno ,&nbsp;Sophie Lecomte ,&nbsp;Christophe Maes ,&nbsp;Jérôme Cachot ,&nbsp;Enora Prado","doi":"10.1016/j.marpolbul.2025.119173","DOIUrl":"10.1016/j.marpolbul.2025.119173","url":null,"abstract":"<div><div>This study investigates the large-scale assessment of microplastic and anthropogenic microfiber pollution across the Atlantic Ocean, using continuous upper layer (0-5 m) sampling device aboard a sailing vessel during the Vendée Globe race 2020. Building on 53 samples and around 64 m³ of filtered seawater, we applied three-stage size filtration 300 μm, 100 μm and 30 μm to capture small-size particles typically undersampled in large-scale oceanic surveys. Microplastic concentrations were inversely proportional to particle size, with the 30–100 μm fraction reaching mean values of 65.09 MP/m³—three times higher than the 100–300 μm range and over 60 times higher than for particles &gt;300 μm. Smaller fractions exhibited higher polymeric and morphological diversity, dominated by polyethylene, polypropylene, and epoxy resins, while larger particles were mainly polyester and polyamide microfibers from textile sources. In addition, cellulosic fibers represented 87 % of the anthropogenic microfibers &gt;100 μm, surpassing synthetic counterparts. These included cotton, viscose, and other regenerated or natural fibers, indicating diverse potential sources such as clothes, hygiene products, and cigarette butts. Geographically, high microplastic concentrations were observed in the North Atlantic (~106.2 MPs/m³ on average) near European coastal regions, whereas lower levels in the South Atlantic subtropical region (~49.8 MPs/m³ on average) suggest vertical redistribution and spatial heterogeneity mediated potentially by ocean dynamics. These results highlight the need to incorporate all anthropogenic particles across fine-scale size classes into marine pollution international assessments. Continuous, opportunistic sampling using leisure, commercial or race vessels is shown to be a valuable approach for capturing particle diversity in remote and open oceanic regions.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119173"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145902898","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":"Blue carbon and microplastic dynamics in natural and planted mangroves, Thailand","authors":"Siriporn Pradit ,&nbsp;Prakrit Noppradit ,&nbsp;Pei Sun Loh ,&nbsp;Thanakorn Jiwarungrueangkul ,&nbsp;Sutinee Sinutok ,&nbsp;Israt Jahan Ami ,&nbsp;Zengxuan Chen ,&nbsp;Kay Khine Soe ,&nbsp;Sujaree Bureekul ,&nbsp;Jitraporn Phaksopa ,&nbsp;Penjai Sompongchaiyakul ,&nbsp;Xixi Lu","doi":"10.1016/j.marpolbul.2025.119208","DOIUrl":"10.1016/j.marpolbul.2025.119208","url":null,"abstract":"<div><div>Mangrove forests (MFs) play a crucial role in climate change mitigation due to their capacity to store significant amounts of blue carbon. This study investigates carbon sequestration dynamics in MF sediments, encompassing natural stands (sites BD1 and BD3) and planted stands (sites PN2, PN3, and PN4), focusing on vertical soil profiles up to 1 m depth. Results indicate that natural mangroves function as blue carbon hotspots, benefiting from mangrove, terrestrial, and marine organic matter (OM) inputs. In comparison, a 10-year-old plantation (PN2) stored approximately twice the carbon of a 2-year-old plantation (PN4), suggesting that effective carbon sink development requires more than a decade. Sediment cores revealed that BD1 dates back to 1952, whereas PN2 is older, dating to 1919. Fine sand layers at BD3 and PN4 are likely remnants of tropical storm deposits, illustrating how mangroves archive century-scale hydroclimatic events. Microplastic (MP) pollution is emerging as a critical concern, with both natural and planted mangroves accumulating MPs in their sediments. A negative correlation between MPs and total organic carbon (TOC) in natural forests suggests that organic-rich sediments may reduce MP retention through competitive adsorption or enhanced biodegradation—an unprecedented finding requiring further investigation. Overall, this study underscores the importance of mangrove restoration for climate resilience and highlights the necessity of integrating MP pollution into blue carbon management strategies. It advances understanding of plantation effectiveness, sediment carbon stability, and anthropogenic stressors influencing mangrove ecosystems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119208"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145903479","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":"Bioavailability-informed sediment assessment in the transboundary Begej Canal: A comparative evaluation of active and passive methods","authors":"Đorđe Pejin ,&nbsp;Slaven Tenodi ,&nbsp;Brent G. Pautler ,&nbsp;Dunja Rađenović Veselić ,&nbsp;Tijana Stojanović ,&nbsp;Kristiana Zrnić Tenodi ,&nbsp;Dejan Krčmar ,&nbsp;Dragana Tomašević Pilipović","doi":"10.1016/j.marpolbul.2026.119299","DOIUrl":"10.1016/j.marpolbul.2026.119299","url":null,"abstract":"<div><div>Sediments act as both sinks and potential secondary sources of heavy metals in aquatic systems, playing a key role in ecological risk dynamics and contaminant cycling. This study assessed sediment quality in the Begej Canal (Serbia) by combining conventional (pseudo-total and sequential extraction) and passive sampling with multiple contamination and risk indices. Pseudo-total analyses revealed elevated chromium, cadmium, lead, and zinc. Hakanson's framework indicated a moderate cumulative ecological risk (RI = 270.8), dominated by cadmium (high ERⁱ), while consensus PEC-Q values highlighted chromium, lead, and zinc as principal contributors to biological-effect potential. Sequential extraction confirmed enhanced mobility of cadmium and lead. In contrast, SPeeper™ passive samplers measured consistently lower freely dissolved concentrations of metals. The interstitial water criteria toxic unit (IWCTU) index (0.01117) remained well below threshold, and the Single Factor Pollution Index (SFPI) classified sediments as unpolluted based on bioavailable fractions (0.54), versus moderate pollution from pseudo-total content (3.22). These results emphasize that pore-water extraction and bulk analyses can overestimate hazard by disrupting equilibria, whereas equilibrium-based passive methods yield a more ecologically realistic assessment. Overall, although the Begej Canal remains impacted by heavy metals, the continuously bioavailable fraction poses negligible ecological risk. The combined application of active and passive sampling with complementary indices provides a transferable framework for distinguishing between potential mobility and actual exposure. This approach supports balanced sediment management and contributes to EU Water Framework Directive efforts to integrate bioavailability into sediment quality assessment across the Danube Basin.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119299"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979404","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":"Multi-isotope characterization of 4,4’-DDT isolated from sediment samples via Orbitrap-IRMS","authors":"Timothy A. Csernica ,&nbsp;John M. Eiler ,&nbsp;Alex L. Sessions","doi":"10.1016/j.marpolbul.2025.119185","DOIUrl":"10.1016/j.marpolbul.2025.119185","url":null,"abstract":"<div><div>Dichlorodiphenyltrichloroethane (DDT) is an environmental contaminant with a long lifetime and significant toxicity. Stable isotopes provide a tool to trace DDT through the environment. We present an Orbitrap Isotope Ratio Mass Spectrometry (Orbitrap-IRMS) method to measure the isotopic content of two DDT fragment ions: <em>m</em>/<em>z</em> = 235 [M⁺– CCl₃] and m/z = 316 [M⁺– HCl]. With 3 nmol sample sizes and commercial 4,4’-DDT standards, we observe: for the [M⁺– CCl₃] fragment, δ¹³C (0.13 ‰); δ³⁷Cl (0.07 ‰); δ¹³C³⁷Cl (0.19 ‰); δ³⁷Cl³⁷Cl (0.19 ‰); δ¹³C³⁷Cl³⁷Cl (0.39 ‰); and for the [M⁺– HCl] fragment, δ³⁷Cl (0.22 ‰); δ³⁷Cl³⁷Cl (0.26 ‰); δ³⁷Cl³⁷Cl³⁷Cl (0.52 ‰). We applied our method to 4,4’-DDT extracted from sediment near the White Point (WP) sewage outflow on the Palos Verdes Shelf, a site with substantial DDT contamination. Resulting precisions were worse for natural samples than standard by a factor of ≈4–5 due to their lower concentrations. Our results for [M⁺– CCl₃] show enrichment vs our standard in δ¹³C (1.87 ± 0.49 ‰) and δ³⁷Cl (1.23 ± 0.29 ‰) while δ¹³C³⁷Cl and δ³⁷Cl³⁷Cl follow the stochastic distribution. The multiply substituted results add confidence and are useful for fingerprinting. For [M⁺– HCl] we see no enrichment in δ³⁷Cl (0.31 ± 1.0 ‰) or δ³⁷Cl³⁷Cl (0.01 ± 1.25 ‰) and possible enrichment in δ³⁷Cl³⁷Cl³⁷Cl (7.81 ± 2.11 ‰). These results are within 2σ of our stochastic error bars and are not evidence of clumped isotope enrichment but should be targeted in future study. Finally, our results place an upper bound on the amount of DDT degradation of 66 %.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119185"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145944462","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":"Marine life under plastic threat: A systematic review of systematic reviews","authors":"Geraldina Signa ,&nbsp;Giovanna Cilluffo ,&nbsp;Namrata Srivastava ,&nbsp;Cristina Andolina ,&nbsp;Agostino Tomasello ,&nbsp;Salvatrice Vizzini","doi":"10.1016/j.marpolbul.2026.119242","DOIUrl":"10.1016/j.marpolbul.2026.119242","url":null,"abstract":"<div><div>Despite rapid advances in research on plastic pollution in marine ecosystems, inconsistencies in reported effects continue to hinder a clear understanding of its mechanisms and impacts. Here, we present a novel and integrative approach, namely a systematic review of existing systematic reviews (SRs) and meta-analyses (MAs), to assess the available evidence and identify potential factors underlying conflicting results concerning the ecotoxicological, ecophysiological, and functional effects of plastic exposure across diverse marine taxa at multiple levels of biological organisation. A total of 34 SRs/MAs, published between 2018 and 2024 and synthesizing 1176 primary studies, were included. Our findings reveal substantial heterogeneity in observed effects, driven by taxonomic and plastic-type variability, and experimental conditions. Notably, while the overlap among SRs/MAs was minimal (Corrected Covered Area = 1.8 %), indicating limited redundancy but strong thematic specialization of research on marine plastic impact, methodological quality was generally poor, with 74 % of SRs/MAs classified as “critically low” according to the AMSTAR 2 framework. By systematically identifying knowledge gaps and key limitations (<em>i.e.</em>, heterogeneous methodologies, strong taxonomic and plastic-size biases, and low ecological realism), this novel approach lays a valuable foundation for guiding future research directions. In addition, it highlights the need for harmonized procedures and enhanced methodological rigour to inform evidence-based policy decision on marine plastic pollution.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119242"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145948878","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":"Features of the spread of organic compounds in the Black Sea after the accidental spill of fuel oil","authors":"Inna A. Nemirovskaya ,&nbsp;Peter O. Zavialov ,&nbsp;Anastasia V. Medvedeva","doi":"10.1016/j.marpolbul.2025.119181","DOIUrl":"10.1016/j.marpolbul.2025.119181","url":null,"abstract":"<div><div>The paper discusses the consequences of the accidents with tankers Volgoneft-212 and Volgoneft-239 in the Black Sea on December 15, 2024. The post-emergency study had showed that the water area near Anapa had been the most polluted. The decrease in hydrocarbon concentrations observed 2.5 months after the accident was due to both their physical weathering on the shore and in the water, and the bacterial degradation. As a result, the concentration of chloroform-extractable bitumen decreased, as well as low-molecular alkanes and polyaromatic hydrocarbons (PAHs) in its composition. However, the composition of hydrocarbons remained dominated by oil-derived compounds in the suspended matter of bottom waters and in surface sediments. After 3.5 months, light n-alkanes up to n-C₁₇ and naphthalenes were almost negligible in the oil lumps. In the surface sediments, the concentrations of aliphatic hydrocarbons also declined. In the Kerch Strait, they decreased from 71 to 53 μg/g (dry weight) and from 1.15 to 0.86 % C_org normalized; in the Anapa area, they dropped from 31 to 25 μg/g (dry weight) and from 5.63 to 3.06 % C_org-normalized. The content of n-C₁₇ and odd high molecular weight homologues increased. In contrast, PAH concentrations slightly rose in the Anapa area mainly because of the increase in phenanthrene content. In the area of the Kerch Strait and Crimean Peninsula, they went up driven by pyrogenic PAHs. This suggests inputs from vessel traffic and shipping related activities as these areas are high traffic maritime routes. The toxicity index in the sediments of Anapa area decreased from an average of 82 % in March to 63 % in April 2025, while the total toxicity level declined from 0.33 to 0.07. Concentrations of individual PAHs did not exceed the Canadian interim quality guidelines for marine surface sediments.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"225 ","pages":"Article 119181"},"PeriodicalIF":4.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145952334","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}