Marine pollution bulletin最新文献

{"title":"Impact of cadmium on copepod Oithona similis at threshold concentrations: Determining safe exposure period","authors":"P. Karthikeyan,&nbsp;Jasmine Singha,&nbsp;S.R. Marigoudar,&nbsp;M. Savurirajan,&nbsp;P. Raja,&nbsp;K.V. Sharma","doi":"10.1016/j.marpolbul.2025.117743","DOIUrl":"10.1016/j.marpolbul.2025.117743","url":null,"abstract":"<div><div>The level of protection by the seawater quality criteria (SWQC) of cadmium (Cd) on planktonic population remains unknown. Therefore, this study assessed the level of protection and safe exposure period of SWQC of cadmium for protection of marine life. The copepod <em>Oithona similis</em> exposed to the Cd at SWQC such as predicted no-effect concentration (PNEC, 0.6 μg/l), criterion continuous concentration (CCC, 1.2 μg/l), and criterion maximum concentration (CMC, 5 μg/l). The <em>in-vivo</em> assays with fluorescein diacetate (FDA) and 2,7-dichlorofluorescein diacetate (DC-FDA) revealed that the SWQCs are safe except for CMC for prolonged exposure. The population growth was higher at 5.4 folds in the control culture, with 4291 ± 134 ind/l, than the culture with CMC of Cd with 2403 ± 149 ind/l which is 2.7 fold growth. Protein content in copepod biomass increased between 3.27 mg/g in the control and 5.73 mg/g in CMC. Biomarker enzyme activities varied among the treatments, and higher expressions were found in CMC. Inhibition of <em>in-vitro</em> FDA and induced DC-FDA activities indicate the stress due to Cd toxicity. Overall, results reveal the SWQC of Cd is not safe for long-term exposure. The PNEC may ensure the protection for up to four days, CCC may be prescribed for one day, and CMC may be prescribed for one-hour exposure.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117743"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487002","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":"Identification of marine microplastics by a combined method of principal component analysis and random forest for fluorescence spectrum processing","authors":"Xiongfei Meng ,&nbsp;Shimeng Chen ,&nbsp;Lanjun Sun ,&nbsp;Bozhen Liu ,&nbsp;Baoshan Ma ,&nbsp;Yanpeng Qu ,&nbsp;Yongxin Song ,&nbsp;Dongqing Li","doi":"10.1016/j.marpolbul.2025.117740","DOIUrl":"10.1016/j.marpolbul.2025.117740","url":null,"abstract":"<div><div>The severely overlapped laser-induced fluorescence spectra between different microplastics pose significant challenges on fluorescence-based particle identification and quantification. To address this problem, this paper proposes a combined method of principal component analysis (PCA) and random forest (RF) for fluorescence spectrum processing. The key idea is to identify the overlapped PCA scores of the first three principal components of fluorescence spectra by the random forest method. Both pure and mixed microplastics samples were used to verify the accuracy of this method. It was demonstrated that both the compositions of the samples and mass concentration of one specific microplastics can be accurately identified. The accuracy for component identification reaches 99.7 % and the correlation coefficient between the predicted and actual concentration exceeds 0.99. Furthermore, the PCA-RF model established with commercial plastic samples was also applied for real marine microplastics identification with good identification results obtained.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117740"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487004","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":"Understanding sediment nutrient cycling in a hypersaline coastal lagoon using hydrogel-based passive sampling techniques","authors":"Jianyin Huang ,&nbsp;Orlando Lam-Gordillo ,&nbsp;Luke M. Mosley ,&nbsp;Christopher Keneally ,&nbsp;Justin Brookes ,&nbsp;David T. Welsh","doi":"10.1016/j.marpolbul.2025.117714","DOIUrl":"10.1016/j.marpolbul.2025.117714","url":null,"abstract":"<div><div>The Coorong, South Australia, is a Ramsar-listed hypersaline coastal lagoon system of significant ecological and cultural importance. Despite facing environmental challenges such as reduced river flow and eutrophication, there is limited knowledge of organic matter fate and nutrient cycling in this system. Understanding nutrient movement and transformation within the Coorong is crucial for effective ecosystem management. This study applied diffusive equilibrium in thin films (DET) and diffusive gradient in thin films (DGT) techniques to measure dissolved nutrients (ammonium and phosphate), dissolved ferrous iron, and sulfide in sediment porewaters across a strong salinity gradient. Sampling sites were selected to capture different environmental conditions, including areas colonised by microphytobenthos and the aquatic macrophyte <em>Ruppia tuberosa</em> (hereafter called <em>Ruppia</em>). Concentration profiles were examined in both light and dark conditions to assess biotic influences on nutrient dynamics and sediment redox conditions. Sediment porewaters in deeper sites of the South Lagoon exhibited high ammonium (941–1718 μmol/L), phosphate (83–171 μmol/L), and sulfide (66–79 μmol/L) concentrations, with negligible nitrate, indicating highly anoxic conditions unsuitable for most benthic fauna. Shallow sediments showed varying concentrations of ammonium, phosphate, dissolved ferrous iron, and sulfide across different sites and depths, influenced by <em>Ruppia</em> and microphytobenthos. The site colonised by <em>Ruppia</em> contained the lowest porewater ammonium concentrations (∼30 μmol/L), suggesting that macrophyte presence can mitigate nutrient buildup in sediments. These findings indicate that sediment quality and nutrient cycling in the South Lagoon may be improved by enhancing the presence and biomass of aquatic macrophytes and macroinvertebrates.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117714"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487003","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":"Historical distribution and multi-dimensional environmental risk assessments of antibiotics in coastal sediments affected by land-based human activities","authors":"Feifei Li ,&nbsp;Lyujun Chen ,&nbsp;Zhiguo Su ,&nbsp;Yuhan Zheng ,&nbsp;Feng Cao ,&nbsp;Wendy Yang ,&nbsp;Donghui Wen","doi":"10.1016/j.marpolbul.2025.117731","DOIUrl":"10.1016/j.marpolbul.2025.117731","url":null,"abstract":"<div><div>Coastal sediment cores provide important records of land-based antibiotics' deposition. This study examined sediment cores from the Hangzhou Bay, East China Sea, dating back to 1980–2020 using 210Pbex. The 40-year analysis revealed a mismatch between sediment depth and age. Wastewater treatment facilities have significantly reduced antibiotics discharge into the sea. We identified 27 antibiotics, with enrofloxacin (ERFX) and nadifloxacin (NDFX) exhibiting the highest average concentrations of 84.9 and 83.4 ng/g, respectively. Quinolones (QNs) were prominent, displaying strong co-occurrence and similar distribution patterns shaped by comparable soil-water distribution coefficient (<em>K</em>_d). QNs correlated positively with total antibiotic concentration, serving as indicators. We proposed a multi-dimensional risk assessment of antibiotics, encompassing ecological and antimicrobial resistance (AMR) risks, complementing each other. The assessment revealed antibiotics with distinct risks: sulfacetamide (SCM) and clindamycin (CLIN) exhibited high ecological risks, while ERFX, ciprofloxacin (CFX), norfloxacin (NFX), gatifloxacin (GTFX), moxifloxacin (MXFX), and marbofloxacin (MBFX) presented high AMR risks.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117731"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487001","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":"From mudflats and saltpans to Open Sea: Plastic ingestion and PBDE/MeO-BDE accumulation in Waterbirds from southern Portugal","authors":"S.N. Veríssimo ,&nbsp;V.H. Paiva ,&nbsp;S.C. Cunha ,&nbsp;A.L.C. Brandão ,&nbsp;J. Coentro ,&nbsp;J.O. Fernandes ,&nbsp;J.M. Pereira ,&nbsp;L.A.E. Batista de Carvalho ,&nbsp;L.R. Cerveira ,&nbsp;M.P.M. Marques ,&nbsp;V. Silva ,&nbsp;A.C. Norte ,&nbsp;J.A. Ramos","doi":"10.1016/j.marpolbul.2025.117727","DOIUrl":"10.1016/j.marpolbul.2025.117727","url":null,"abstract":"<div><div>Plastic ingestion greatly affects waterbirds, causing lacerations and potentially leading to health disruptions from chemical leaching. Polybrominated diphenyl ethers (PBDEs), used as flame retardants in plastics, remain persistent in the environment despite restrictions, along with the less studied methoxylated PBDEs (MeO-BDEs), that may result from their transformation. Since most plastic pollution in the heavily impacted marine environment comes from terrestrial sources, freshwater/estuarine and coastal environments can also be heavily exposed to contamination. Nonetheless, research in these areas remains limited.</div><div>We studied the breeding waterbird community from Ria Formosa (Algarve, Portugal) as a proxy of such contamination and sampled the wader species feeding in mudflats and saltpans, little terns feeding in lagoon channels and the adjacent sea, opportunistic gulls feeding mostly on fishery discards and landfills and marine foraging gulls feeding exclusively at sea. Specifically, we assessed 1) plastic ingestion, through the analysis of regurgitations and faeces, and 2) PBDEs and MeO-BDES uptake in eggs, feathers, and preen oil. Results showed that, overall, microplastics were the most commonly detected particles. Yellow-legged gulls (<em>Larus michahellis</em>) and little terns (<em>Sternula albifrons</em>) ingested more particles, especially fibres. Eggs of black-winged stilt (<em>Himantopus himantopus</em>) and yellow-legged gull had higher PBDEs concentrations, while MeO-BDEs did not differ among species. Feathers exhibited low detection values, but MeO-BDEs suggests marine invertebrates' consumption. Little terns accumulated more PBDEs and MeO-BDEs, suggesting an association between plastic ingestion and contamination load. However, species-specific traits, dietary preferences, and foraging areas should also be taken into consideration.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117727"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487005","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":"Benthic ecosystem function responses to plasticizer content in polyester and PVC","authors":"Ines Bartl ,&nbsp;Yuchuan Chen ,&nbsp;Joel Rindelaub ,&nbsp;Samantha Ladewig ,&nbsp;Simon Thrush","doi":"10.1016/j.marpolbul.2025.117713","DOIUrl":"10.1016/j.marpolbul.2025.117713","url":null,"abstract":"<div><div>Plastics are ubiquitous contaminants in marine systems with a diverse set of chemical components. While eco-toxicological effects of plastic chemicals provide insights on how marine species respond to plastic exposure, there is lack in ecological understanding of such impacts. In a mesocosm experiment, we measured benthic fluxes to determine ecosystem function responses to polyester netting (low plasticizer concentration) and PVC netting (high plasticizer concentration). Gross primary production rates and ammonium efflux were higher in both plastic treatments compared to the control, but responses were stronger in the polyester treatment. In the PVC treatment we additionally observed a strong response in nitrate fluxes which suggests a disturbance of the benthic N cycle. Our results imply that the concentration of chemical additives in new plastics can be a driver for ecological responses and reduction of plastic emissions needs to remain at the forefront of environmental plastic pollution regulations.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117713"},"PeriodicalIF":5.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480253","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":"Impacts of river inputs and aquaculture on nutrient dynamics in Qinglan Bay and adjacent coastal waters in East Hainan, China","authors":"Sang Wu ,&nbsp;Zuoli Tan ,&nbsp;Youfei Fu ,&nbsp;Nannan Gao ,&nbsp;Silin Ni ,&nbsp;Rong Zhao ,&nbsp;Penglan Shi ,&nbsp;Lili Han ,&nbsp;Jianzhong Su ,&nbsp;Zhenzhen Zheng ,&nbsp;Ehui Tan ,&nbsp;Shuh-ji Kao ,&nbsp;Min Xu","doi":"10.1016/j.marpolbul.2025.117729","DOIUrl":"10.1016/j.marpolbul.2025.117729","url":null,"abstract":"<div><div>Nitrogen and phosphorus are vital nutrients for maintaining aquatic ecosystem health, with estuaries serving as critical conduits for nutrient transport into the ocean. Understanding the spatial distribution and dynamics of nutrients in estuaries is essential for assessing their ecological impact and informing water quality management. We investigated the spatial distribution and forms of dissolved inorganic nitrogen and phosphorus in Qinglan Bay, East Hainan, China, focusing on the impacts of riverine inputs and intensive aquaculture activities. Results indicated elevated nutrient concentrations near river sources, diminishing towards the ocean. Aquaculture operations contribute notably to nitrogen and phosphorus levels, primarily introducing ammonium and dissolved organic phosphorus. Despite these inputs, Qinglan Bay exhibits a strong capacity for nutrient self-purification through biological uptake and sedimentation, thereby mitigating the potential ecological burden on adjacent coastal environments. Moreover, the outflow from the bay with low DIN/DIP ratio may impact the biogeochemistry of neighbouring coastal waters.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117729"},"PeriodicalIF":5.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474869","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":"Research on the ensemble forecasting method for green tide paths in the Yellow Sea based on parameter perturbation","authors":"Yinlin Zhu,&nbsp;Yuheng Wang,&nbsp;Liang Zhao","doi":"10.1016/j.marpolbul.2025.117717","DOIUrl":"10.1016/j.marpolbul.2025.117717","url":null,"abstract":"<div><div>Yellow Sea green tides have become recurring marine ecological disasters, making accurate forecasting essential for early warning and preventive measures. This study incorporates a stochastic perturbed parameterization scheme into the Yellow Sea Green Tide Drift Model to create an ensemble forecast of the drifting path of green tides, using the 2016 Yellow Sea green tide event as a case study. The ensemble forecast experiment demonstrates that this approach effectively simulates the drift characteristics of the 2016 green tide. Validation with Moderate Resolution Imaging Spectroradiometer (MODIS) remote sensing data reveals that the ensemble forecast significantly enhances the forecasting performance for periods exceeding 15 days, with the average absolute error in the forecast path reduced by 32 %.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117717"},"PeriodicalIF":5.3,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474870","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":"Advancements and obstacles in improving the energy efficiency of maritime vessels: A systematic review","authors":"Abdullah Sardar ,&nbsp;Rabiul Islam ,&nbsp;Mohan Anantharaman ,&nbsp;Vikram Garaniya","doi":"10.1016/j.marpolbul.2025.117688","DOIUrl":"10.1016/j.marpolbul.2025.117688","url":null,"abstract":"<div><div>The maritime industry, a cornerstone of global trade, faces mounting pressure to improve energy efficiency and minimize environmental impact. To address this, a systematic review is proposed to analyze trends and advancements, aiming to improve the energy efficiency of ships. This review comprehensively examines contemporary methodologies and persistent challenges in assessing ship energy efficiency. We analyze recent advancements in ship design and operational practices that promote efficiency gains. Additionally, we explore the evolution of regulatory frameworks and industry standards governing energy efficiency assessment. Key challenges, including data availability, measurement accuracy, and technological limitations, are scrutinized along with potential solutions. This review aims to equip researchers, practitioners, and policymakers with a comprehensive understanding of the current landscape, paving the way for future research and policy initiatives that drive sustainable maritime transportation.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117688"},"PeriodicalIF":5.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464243","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":"Assessment of heavy metal pollution in Tobruk Bay, Libya: A focus on anthropogenic impacts and pollution indices","authors":"Salah Ali Mahgoub Idris ,&nbsp;Gaith G. Altohame Jalgaf ,&nbsp;Marwa Faez Ali Mohammed","doi":"10.1016/j.marpolbul.2025.117709","DOIUrl":"10.1016/j.marpolbul.2025.117709","url":null,"abstract":"<div><div>This study investigates the spatial distribution and ecological risks of heavy metal contamination (Cu, Cd, Zn, Mn, Fe, Pb) in sediments from 14 sites across Tobruk Bay, Libya, during October 2024. Using pollution indices such as Cf, Igeo, and Pi, significant spatial variations were observed, identifying critical contamination hotspots. Iron (Fe), Zinc (Zn), and Cadmium (Cd) were the dominant pollutants, particularly near municipal sewage outfalls and the desalination plant outflow, with Fe and Zn reaching 217,6 mg/kg and 327.5 mg/kg, respectively. Moderate Lead (Pb) and Copper (Cu) contamination was detected near port and refinery zones, while Manganese (Mn) exhibited minimal contamination, likely from natural sources. These findings highlight the urgent need for improved wastewater treatment, stricter industrial discharge regulations, and continuous monitoring to mitigate heavy metal accumulation and protect Tobruk Bay's marine ecosystem.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117709"},"PeriodicalIF":5.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464247","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}