Marine pollution bulletin最新文献

{"title":"Ecological risk assessment of heavy metals in varied matrices of coastal environment of Maharashtra, India, and their effects on forked venus clam, Gafrarium divaricatum (Gmelin, 1791)","authors":"Shubra Singh ,&nbsp;Saurav Kumar ,&nbsp;M. Harshavarthini ,&nbsp;Pokanti Vinay Kumar ,&nbsp;Nalini Poojary ,&nbsp;Manoj Pandit Brahmane ,&nbsp;Ashok Kumar Jaiswar ,&nbsp;Gajanan S. Ghode ,&nbsp;Varsha Bhatkar ,&nbsp;N.S. Nagpure","doi":"10.1016/j.marpolbul.2025.117644","DOIUrl":"10.1016/j.marpolbul.2025.117644","url":null,"abstract":"<div><div>The spatial and seasonal variation of heavy metal contamination was assessed in the seawater, sediments, and clam samples collected from Ratnagiri, Bandra, and Aksa Beach, along Maharashtra Coast, India, during the different seasons. The concentrations of eleven heavy metals were analyzed using inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and the metal concentrations were found in the order sediment &gt; clam &gt; seawater. Various pollution indices indicated that Cd and As mainly contributed to ecological risks, and Bandra was the most contaminated site. Bioaccumulation studies in intertidal clam, <em>Gafrarium divaricatum</em> (Gmelin, 1791), showed that most heavy metals exceeded permissible limits except Cu and Zn. Histopathological examination of the clam tissues revealed hemocyte infiltration, damage in cilia and lamellae of the gills, tubular atrophy, and necrosis in the digestive glands. The findings of this research highlight the potential of <em>G. divaricatum</em> as a reliable bioindicator species for biomonitoring and sustainable management of coastal ecosystems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117644"},"PeriodicalIF":5.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143302894","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":"Numerical modeling of the dispersion and accumulation of marine litter from the Dniester River in coastal areas of the northwestern Black Sea","authors":"Leidy M. Castro-Rosero ,&nbsp;Ivan Hernandez ,&nbsp;Marc Mestres ,&nbsp;Maria Liste ,&nbsp;Jose M. Alsina ,&nbsp;Manuel Espino","doi":"10.1016/j.marpolbul.2025.117602","DOIUrl":"10.1016/j.marpolbul.2025.117602","url":null,"abstract":"<div><div>This study investigates the transport and accumulation of Floating Marine Litter (FML) in the northwestern Black Sea, with a focus on the influence of the Dniester River and regional circulation patterns, including the Sevastopol Eddy. Two numerical modeling configurations (C1 and C2) are compared to assess their effectiveness in simulating FML dispersion. While both configurations show similar final beaching percentages, C2, which incorporates pre-calculated shoreline distances, can be more spatially accurate as it accounts for the complex shape of the coastline. The model's capability is validated through comparisons with previous models, satellite-derived Suspended Particulate Matter (SPM), and in situ observations from the 2017 EMBLAS campaign. These comparisons highlight FML accumulation patterns, particularly at the mouth of the Dniester River in the Zatoka region and in open waters within the Northwestern Shelf (NWS). The study suggests a correlation between satellite SPM observations and microplastic (MP) presence in coastal zones around the Dniester River, indicating avenues for future research. Understanding these dynamics is crucial for coastal management, with significant implications for environmental conservation strategies in the northwestern Black Sea.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117602"},"PeriodicalIF":5.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143303051","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":"Long-term phosphate exposure effects on juvenile turbot (Scophthalmus maximus): Growth, metabolism, and adaptive responses","authors":"Xin Li ,&nbsp;Lele Wu ,&nbsp;Jiale Zhou ,&nbsp;Yaolin Li ,&nbsp;Ting Qi ,&nbsp;Xiefa Song ,&nbsp;Zongcheng Song ,&nbsp;Xian Li","doi":"10.1016/j.marpolbul.2025.117618","DOIUrl":"10.1016/j.marpolbul.2025.117618","url":null,"abstract":"<div><div>Phosphate (PO₄³⁻-P) is one of the main pollutants contributing to water eutrophication in natural ecosystems and is also a neglected factor in water management. The toxicological response mechanisms of aquatic organisms to phosphate remain unclear. In the current study, juvenile <em>Scophthalmus maximus</em> were exposed to 0 (CK), 60 (LP), and 120 mg/L (HP) of PO₄³⁻-P for 60 days. Metabolomics analysis indicated that juveniles could compensate for growth by adjusting the galactose metabolic pathway to supply energy under LP, while they disrupted the glutathione metabolic pathway, inducing irreversible oxidative stress damage under HP. Furthermore, integrated biomarker response version 2 (IBRV2) analysis showed that juveniles gradually adapted to LP, while plasma glucose, triglycerides, and other biomarkers in the HP group remained significantly higher than in the CK group. These findings reveal the potential toxicity mechanism of phosphate to fish and provide necessary data for the safety monitoring and reasonable control of phosphate.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117618"},"PeriodicalIF":5.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176632","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":"Metagenomic surveys show a widespread diffusion of antibiotic resistance genes in a transect from urbanized to marine protected area","authors":"Tania Alonso-Vásquez ,&nbsp;Camilla Fagorzi ,&nbsp;Alessio Mengoni ,&nbsp;Matteo Oliva ,&nbsp;Duccio Cavalieri ,&nbsp;Carlo Pretti ,&nbsp;Lisa Cangioli ,&nbsp;Giovanni Bacci ,&nbsp;Alberto Ugolini","doi":"10.1016/j.marpolbul.2025.117640","DOIUrl":"10.1016/j.marpolbul.2025.117640","url":null,"abstract":"<div><div>Ports are hot spots of pollution; they receive pollution from land-based sources, marine traffic and port infrastructures. Marine ecosystems of nearby areas can be strongly affected by pollution from port-related activities. Here, we investigated the microbiomes present in sea floor sediments along a transect from the harbour of Livorno (Central Italy) to a nearby marine protected area. Results of 16S rRNA amplicon sequencing and metagenome assembled genomes (MAGs) analyses indicated the presence of different trends of specific bacterial groups (e.g. phyla NB1-j, Acidobacteriota and Desulfobulbales) along the transect, correlating with the measured pollution levels. Human pathogenic bacteria and antibiotic resistance genes (ARGs) were also found. These results demonstrate a pervasive impact of human port activities and highlight the importance of microbiological surveillance of marine sediments, which may constitute a reservoir of ARGs and pathogenic bacteria.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117640"},"PeriodicalIF":5.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Organochlorine pesticides and polybrominated diphenyl ethers in sediments around oil production facilities in the Escravos River basin, Nigeria: Implications for ecological and human health risk","authors":"Chukwujindu M.A. Iwegbue ,&nbsp;Eze W. Odali ,&nbsp;Marian Reuben-Okoye ,&nbsp;Chinedu J. Ossai ,&nbsp;Ijeoma F. Ogwu ,&nbsp;Chijioke Olisah ,&nbsp;Bice S. Martincigh","doi":"10.1016/j.marpolbul.2025.117526","DOIUrl":"10.1016/j.marpolbul.2025.117526","url":null,"abstract":"<div><div>Organochlorine pesticides (OCPs) and polybrominated diphenyl ethers (PBDEs) are halogenated organic compounds of special interest because of their persistent, pervasive and exceptionally toxic nature. Sediments collected in the vicinity of petroleum production facilities in the Escravos River basin (ERB) of Nigeria were analyzed for 20 OCPs and 39 PBDEs by gas chromatography–mass spectrometry (GC–MS). The OCP concentrations in the ERB sediments varied from 0.69 to 10.7 ng g⁻¹ (mean = 5.65 ng g⁻¹), while those of the Σ39 PBDEs ranged between 0.19 and 435 ng g⁻¹ (mean = 39.1 ng g⁻¹). The OCP class profiles in the sediments followed the order: Drins &gt; Chls &gt; DDTs &gt; Endos &gt; HCHs, while those of the PBDEs were in the order: tetra- &gt; penta- &gt; hexa- &gt; tri- &gt; hepta- &gt; di- &gt; mono- &gt; deca-BDE. The ecological risk assessment suggests rare adverse effects for OCPs in the ERB sediments and potential adverse effects for penta-BDEs in the sediments. The results from the carcinogenic risk assessment suggest that human exposure to OCPs in the majority of the sites can be of moderate carcinogenic risk, while there is no risk for exposure to PBDEs in the sediments. The source analyses reflect the prominence of historically used sources over recent inputs for OCPs, while those of PBDEs reflect products of debromination of higher BDEs and the use of penta-BDEs rather than the deca-PBE mixture in the region.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117526"},"PeriodicalIF":5.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176637","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":"Hot and toxic: Accumulation dynamics and ecotoxicological responses of mussel Mytilus galloprovincialis exposed to marine biotoxins during a marine heatwave","authors":"Marta Dias ,&nbsp;Busenur Özkan ,&nbsp;João Ramos ,&nbsp;António Marques ,&nbsp;Rui Rosa ,&nbsp;Pedro Reis Costa ,&nbsp;Ana Luísa Maulvault","doi":"10.1016/j.marpolbul.2025.117629","DOIUrl":"10.1016/j.marpolbul.2025.117629","url":null,"abstract":"<div><div>Climate change is increasing marine heatwaves (MHWs) frequency and severity worldwide. These extreme events often cause bivalves' mass mortality and facilitate the growth, proliferation and dispersion of toxin-producing microalgae blooms associated with threats to seafood safety. Yet, the interactive effects between MHW and uptake of marine biotoxins by biota are a novel topic still lacking thorough research, from both the ecotoxicological and seafood safety standpoints. This study assessed the effects of a MHW event on the accumulation/elimination dynamics of diarrhetic shellfish toxins in <em>Mytilus galloprovincialis</em> exposed to <em>Prorocentrum lima</em> and the ecotoxicological responses of mussels co-exposed to these two stressors. Results showed that acute exposure to +4 °C reduced toxins accumulation (−49 %) and elimination (−77 %) compared to control temperature. Moreover, exposure to MHW and toxins affected mussels' antioxidant activity, lipid and protein damage, and metabolism in a tissue-specific manner. These findings highlight that <em>M. galloprovincialis</em> can face higher vulnerability to toxins when MHW events strike.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117629"},"PeriodicalIF":5.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation of subsurface mechanical dispersion (SSMD) of oil by a water jet","authors":"Zhaonian Qu ,&nbsp;Tanvir Al Farid ,&nbsp;Scott Socolofsky ,&nbsp;Timothy Steffek ,&nbsp;Michel Boufadel","doi":"10.1016/j.marpolbul.2025.117586","DOIUrl":"10.1016/j.marpolbul.2025.117586","url":null,"abstract":"<div><div>This study explores the formation of oil droplets (dispersion) using a water jet, labeled herein subsurface mechanical dispersion (SSMD), as an alternative to chemical dispersants for mitigating impacts from subsea oil releases. Utilizing Reynolds-Averaged Navier-Stokes (RANS) and Mixture equations (a multiphase model to calculate the oil volume fraction) within the CFD model Fluent, both small-scale (a 1.0 mm oil orifice diameter and 0.17 mm water jet orifice diameter) and large-scale simulations (oil diameter = 0.5 m and water diameter = 0.05 m) were conducted. Four metrics were used to evaluate the dispersion potential: spatial spread of the oil; the maximum stable diameter of oil droplets, D95; and two metrics that depend on the product of the energy dissipation rate and the holdup (ratio of oil volume to total volume in each cell). The spreading and distribution of oil was quantified in the whole domain of the corresponding simulation. The remaining metrics were evaluated in both the area at the intersection of the oil plume and the water jet, and along the main trajectory of flow. For the small-scale experiment, the simulation results showed good agreement with laboratory observations in terms of oil plume deflection and droplet sizes. At the large-scale, the simulations suggested that SSMD reduced the D95 by 40 % and 80 % for water flow rates that are 17 % and 55 % of the oil rate, respectively. The results suggest that a water jet, at a sufficiently large flowrate, could be a viable technology for initial dispersion of oil spill during response. Further research, including experimental validation and detailed simulations, is needed to ascertain the full potential of SSMD, especially for oil releases containing gas.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117586"},"PeriodicalIF":5.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176636","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":"Clearance rates and diarrhetic shellfish toxin accumulation by North Atlantic bivalves fed on North American strains of Dinophysis acuminata","authors":"Bradley T. McGuire ,&nbsp;Marta P. Sanderson ,&nbsp;Juliette L. Smith ,&nbsp;Christopher J. Gobler","doi":"10.1016/j.marpolbul.2025.117613","DOIUrl":"10.1016/j.marpolbul.2025.117613","url":null,"abstract":"<div><div>Filter feeding bivalves exposed to the harmful algal bloom (HAB) genus, <em>Dinophysis</em>, become intoxicated by the uptake of diarrhetic shellfish toxins (DSTs) produced by these phytoplankton. Here, three species of bivalve (<em>Crassostrea virginica</em>, <em>Mercenaria mercenaria</em>, and <em>Mytilus edulis</em>) native to the western North Atlantic were exposed to two North American strains of toxigenic <em>Dinophysis acuminata</em> to assess the impacts of cell density, cell density as a fraction of the total plankton community, and differing <em>Dinophysis</em> prey (i.e. strains of the ciliate, <em>Mesodinium rubrum</em>) on bivalve clearance rates. All bivalves cleared <em>D. acuminata</em> faster when the dinoflagellate was offered at moderate densities (10,000 cells L⁻¹) as compared to high densities (100,000 cells L⁻¹). <em>C. virginica</em> cleared a more toxic Massachusetts strain of <em>D. acuminata</em> significantly faster than a less toxic New York strain (<em>p</em> &lt; 0.05). When presented with <em>Dinophysis</em> in mixed culture with the non-HAB species, <em>Rhodomonas salina,</em> in varying proportions, <em>C. virginica</em> clearance rates slowed significantly as the relative and absolute abundance of <em>D. acuminata</em> increased (<em>p</em> &lt; 0.05), whereas <em>M. edulis</em> displayed a preference for the algae that was more abundant. While <em>C. virginica</em> and <em>M. edulis</em> cleared <em>R. salina</em> significantly faster than <em>M. mercenaria</em> (<em>p</em> &lt; 0.05), there were no differences in the clearance rates of <em>D. acuminata</em> among bivalves. In an additional experiment where <em>M. edulis</em> was exposed to a constant, density (∼ 15,000 cells L⁻¹) of <em>D. acuminata</em> for 36 h and then fed a non-toxic food source for 24 h to quantify toxin accumulation and depuration, mussels rapidly accumulated DSTs and pectenotoxins (PTXs) during exposure to <em>Dinophysis</em> but depurated PTXs at a rate 3–14 times faster than DSTs (<em>p</em> = 0.07). Collectively, this study demonstrates that the accumulation of DSTs in bivalves varies as a function of <em>D. acuminata</em> density, species, and strain, and that feeding characteristics of, and toxin dynamics within, <em>M. edulis</em> make it more vulnerable to DST accumulation than <em>C. virginica</em> and a likely DST vector in bloom-prone regions.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117613"},"PeriodicalIF":5.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Community organization and network stability of co-occurring microbiota under the influence of Kuroshio Current","authors":"Yi Li ,&nbsp;Yan Li ,&nbsp;Hualong Wang ,&nbsp;Chuyu Zhang ,&nbsp;Kaiyue Lian ,&nbsp;Feilong Liu ,&nbsp;Yantao Liang ,&nbsp;Zhaohui Chen ,&nbsp;Yueqi Zhang ,&nbsp;Hongbing Shao ,&nbsp;Andrew McMinn ,&nbsp;Min Wang","doi":"10.1016/j.marpolbul.2025.117637","DOIUrl":"10.1016/j.marpolbul.2025.117637","url":null,"abstract":"<div><div>The Kuroshio Current structures environmental characteristics and biodiversity in the northwestern Pacific Ocean (NWPO), a region renowned for its dynamic oceanographic processes and rich marine ecosystems. However, the assembly and associations responses of prokaryotes and microeukaryotes to the Kuroshio Current remain largely unknown. Here, co-occurrence properties and stability of prokaryotic and eukaryotic microbiomes from three regions influenced by the Kuroshio: Kuroshio South of Japan (KSJ), Kuroshio Extension (KE), and the Kuroshio-Oyashio interfrontal zone (KOIZ) are systematically investigated. Microbiomes in the KE showed reduced phylogenetic distance and broader niche breadth than those in the KSJ and KOIZ. Microeukaryotic robustness was highest in the KE and lowest in the KOIZ, while prokaryotes showed the opposite pattern. Prokaryotic and microeukaryotic robustness and compositional stability formed complementary stabilizing and phylogenetic distance along vertical gradients in the KOIZ region, helping to maintain community and ecosystem stability. Prokaryotes and microeukaryotes formed complementary stabilizing under the influence of the Kuroshio Current. Overall, the network of prokaryotes was more stable than that of microeukaryotes, and microeukaryotes were more sensitive to environmental variations than prokaryotes. These results show how the Kuroshio Current influences the community organization and co-occurrence stability of prokaryotic and eukaryotic microbiomes, respectively, as well as their contrasting adaptability and survival strategies to environmental variation.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117637"},"PeriodicalIF":5.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176635","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":"Integrated machine learning-based optimization framework for surface water quality index comparing coastal and non-coastal cases of Guangxi, China","authors":"Xizhi Nong ,&nbsp;Fengcheng He ,&nbsp;Lihua Chen ,&nbsp;Jiahua Wei","doi":"10.1016/j.marpolbul.2025.117564","DOIUrl":"10.1016/j.marpolbul.2025.117564","url":null,"abstract":"<div><div>In this study, an optimized comprehensive water quality index (WQI) model framework is developed, which combines advanced machine learning technology to compare different types of surface water quality assessment. The proposed framework enhancement encompasses four critical methodological advancements, i.e., water quality parameter selection, parameter normalization, weighting determination, and WQI aggregation function comparison. The Random Forest (RF) machine learning algorithm ranks water quality parameters based on their relative importance in determining overall water quality regimes. The water quality parameter weightings were determined using the Rank Order Centroid (ROC) method. The parameter normalization was designed following national standards by transforming observation data into dimensionless values on a unified scale and comparing the sensitivity and prediction error of four distinct WQI models. Multiple Linear Regression (MLR) models were employed to assess the sensitivity and precision of the WQI model. A comparison case study was conducted in China's typical coastal and non-coastal regions, i.e., Guangxi Zhuang Autonomous Region (Guangxi), to verify the robustness and adaptability of WQI model performance. The results show that the overall water quality status in Guangxi was generally in “Good” or “Medium” level. There was significant spatial water quality heterogeneity in the river systems of Guangxi, and the non-coastal region showed better water quality, almost at a “Good” level compared to the coastal region. The weighted quadratic mean (WQM) and the unweighted root mean square (RMS) models were selected as the most suitable WQI models for water quality evaluation in coastal and non-coastal regions in Guangxi. The water quality in the coastal region was almost “Medium”, with the average WQIs of WQM and RMS models being 74.27 and 76.51, respectively. The average WQIs evaluated by WQM and RMS models in non-coastal region were 85.39 and 88.81, respectively. This study can provide a valuable and reliable scientific reference for future administrative bodies implementing effective water environment risk prevention and management measures.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117564"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176640","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}