Marine pollution bulletin最新文献

{"title":"Unmasking heavy metal contamination: Tracing, risk estimating and source fingerprinting from coastal sediments of the Payra River in Bangladesh.","authors":"Salma Sultana, Niger Sultana, Mohammad Moniruzzaman, Muhammad Rehan Dastagir, Md Kamal Hossain","doi":"10.1016/j.marpolbul.2024.117455","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117455","url":null,"abstract":"<p><p>The Payra River, cicual for fish breeding, feeding and nursery in coastal Bangladesh, faces heavy contamination from industrial activities, agricultural runoff and poor waste management. This study used ICP-MS to assess metal contamination levels, risk status and potential sources in river sediment. The findings showed that the mean concentrations (mg/kg) of metals followed the decreasing order: Mn (434.24 ± 75.91) > Zn (66.42 ± 12.86) > Cr (44.59 ± 8.98) > Ni (40.30 ± 7.43) > Cu (34.07 ± 6.84) > Co (15.72 ± 2.84) > Pb (14.60 ± 5.56) > As (4.70 ± 0.72) > Hg (0.28 ± 0.21) > Cd (0.10 ± 0.03) with Mn significantly exceeding the recommended guidelines. Although contamination factors (CF < 1) and the pollution load index (PLI < 1) indicated low pollution, Hg and Cd posed greater ecological risks. However, the Risk Index (RI < 150) showed overall low pollution risk. Sediment ranged from uncontaminated to moderately contaminated (Igeo = 0-1). Non-carcinogenic risks were minimal (HQ < 1), but children were more vulnerable to As (HI = 2.40E-01) and Cr (HI = 2.17E-01). Carcinogenic risks were also higher for children, particularly from As (CR = 8.37E-06) and Pb (CR = 6.10E-06). Pearson correlation, principal component analysis (PCA), cluster analysis (CA) and spatial analyses indicated shared sources for As, Hg, and Cd, with Mn likely from different sources. The PMF model identified three pollution sources: natural agricultural activities (23.7 %), anthropogenic activities (54.43 %), and industrial activities (23.74 %).</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117455"},"PeriodicalIF":5.3,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864777","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":"Stressor fluctuations alter mechanisms underpinning seagrass responses to multiple stressors.","authors":"Andria Ostrowski, Rod M Connolly, Jasmine A Rasmussen, Christina A Buelow, Michael Sievers","doi":"10.1016/j.marpolbul.2024.117444","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117444","url":null,"abstract":"<p><p>Multiple anthropogenic stressors degrade ecosystems globally. A key knowledge gap in multiple stressor research is how variability in stressor intensity (i.e., fluctuations) and synchronicity (i.e., timing of fluctuations) affect biological responses, and the mechanisms underpinning responses. We evaluated the mechanistic effects of reduced light and herbicide contamination on seagrass, and determined how variations in stressor intensity and synchronicity influence the underlying mechanisms of responses. We used structural causal modelling and structural equation modelling to elucidate direct and mediating effects. Out-of-phase introduction (i.e., asynchronous fluctuations) altered the mechanistic pathways of how stressors affect seagrass relative to static stressors, and resulted in the greatest biomass loss (under the most intense stressor combination, ∼50 % reduction). Therefore, previous experiments that predominantly test only static stressor intensities might underestimate detrimental impacts in nature. Future experiments should explore mechanistic effects across realistic stressor intensities and synchronicities to improve our understanding and management of multiple stressors.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117444"},"PeriodicalIF":5.3,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864775","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 trends in summer hypoxia and associated driving factors in the Pearl River Estuary, China.","authors":"Zhenkun Lin, Jiatang Hu, Leiping Ye, Yongsheng Cui, Jiaxue Wu","doi":"10.1016/j.marpolbul.2024.117456","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117456","url":null,"abstract":"<p><p>In this study, we collected in situ water quality data during the summer months from 1985 to 2021 and surface sediment organic carbon and stable carbon isotope (δ¹³C) data from 2002 and 2020 in the Pearl River Estuary (PRE), to analyze long-term trends in hypoxia and explore changes in deoxygenation processes and their potential drivers. Our results showed that hypoxic events in the PRE transitioned from episodic in Lingdingyang Bay in the 2000s to periodic in the lower estuary by the late 2010s. During this transition, the dominant deoxygenation processes shifted from being caused by terrestrial and wastewater emissions to eutrophication. Increased wastewater discharge, reduced sediment load, weakened wind mixing and strengthened coastal upwelling are potential factors contributing to the changes in deoxygenation processes and the deterioration of hypoxic conditions. This study provides a scientific basis for formulating policies to mitigate hypoxia in large estuaries deeply affected by human activities.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117456"},"PeriodicalIF":5.3,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864772","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":"Investigating terminal film thickness in oil spreading dynamics under opposing net surface tension force on calm water.","authors":"Mehmet Onur Dogan, Ismail Durgut","doi":"10.1016/j.marpolbul.2024.117457","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117457","url":null,"abstract":"<p><p>Heavy oils, particularly in cold water, spread slowly and eventually stop at a certain film thickness, known as the terminal film thickness. A few studies have specifically addressed the conditions and physical mechanisms that terminate the spreading process. However, traditional models for oil spreading on calm water do not predict this behavior, which may be due to a net negative surface tension effect. This paper aims to extend the existing spreading models to include the impact of net negative surface tension, where surface tension slows down and eventually stops gravity-driven spreading. Nihoul's spreading equation with negative surface tension is first analytically solved, and a physical equation for terminal thickness is derived. A Finite Element model is then developed and validated against analytical results for instantaneous spills. Finally, the model is extended to continuous spills, and the results for terminal film thickness and slick radius are compared with experimental measurements.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117457"},"PeriodicalIF":5.3,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864767","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":"Analysis of PAHs content, source identification and ecological risk assessment in surface sediments from the Caspian Sea.","authors":"Marjan Esmaeilzadeh, Ali Mehdinia","doi":"10.1016/j.marpolbul.2024.117472","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117472","url":null,"abstract":"<p><p>The concentrations of Polycyclic Aromatic Hydrocarbons (PAHs) in surface sediments were investigated in the southern Caspian Sea. The results revealed that the total PAHs in sediments varied from 6.53 to 170.6 ng·g^{- 1}, with an average of 60.59 ng·g^{- 1}. The methods of diagnostic ratio and Principal Component Analysis (PCA) were applied to explore the sources of PAHs in the sediments and the results indicated that they had both petrogenic and pyrogenic origins. The ecological risk induced by PAHs in this area was evaluated using sediments quality guidelines (SQGs) criteria and Risk Quotient (RQ) index. SQG ranges for PAHs such as Acenaphthylene (Acy), Acenaphthene (Ace) and Fluorene (F) in the Lisar transect were found at a moderate toxicity level. The RQ∑PAHs index suggested a low ecological risk in the studied stations. Based on the results of the Toxic Equivalent (TEQ) approach, PAHs did not pose carcinogenic risks.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117472"},"PeriodicalIF":5.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854422","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":"A multi-compartment monitoring approach to assess the impact of marine litter in a Mediterranean coastal area.","authors":"Dario Giani, Matteo Baini, Cristina Panti, Matteo Galli, Ilaria Caliani, Margherita Concato, Silvia Casini, Maria Cristina Fossi","doi":"10.1016/j.marpolbul.2024.117466","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117466","url":null,"abstract":"<p><p>Marine litter, particularly microplastics, is a growing threat to the Mediterranean Sea, impacting biodiversity and ecosystem health. However, most studies conducted in the Mediterranean Sea have focused on monitoring of only specific environmental compartments, and rarely have highlighted the overall impacts affecting an area. Therefore, using a new multi-compartment monitoring approach and a standardized methodology, this study investigates the abundance, distribution, composition and impact of marine litter on beaches, surface waters, fish and mussels in a coastal area of Tuscany (Italy). Concerning beach macro litter values, significant differences were found among the three beaches analysed, with the highest amount in the Feniglia beach (mean value = 1245 items/100 m). The top items found are cotton bud sticks (32.3 %), which in the winter survey at Feniglia beach, reached a remarkable density of 1983 items/100 m. Microlitter (1-5 mm), was detected in the beach sediments with a mean abundance of 130 items/m². Regarding floating macrolitter, the transect with the highest values was the Feniglia site at 3 nautical miles in autumn (1083 items/km²) while for floating microlitter the highest concentration (832,683 MPs/km²) was found in front of Scarlino. Of the 234 fish analysed from 5 different species, 67 contained microplastics in the gastrointestinal tract (28 %) with a mean value of 0.4 items per individual. The species with the highest occurrence was the European anchovy (Engraulis encrasicolus) (53 %) followed by the bogue (Boops boops) (40 %). Through the application of the Marine Litter Impact Index (MLII), considering all the compartments analysed, the Feniglia area emerges as the ecosystem most impacted by marine litter (mean MLII = 3.5, high). This study highlights how a multi-compartment monitoring approach is crucial for understanding the complex interactions between land, sea, and biota.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117466"},"PeriodicalIF":5.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854479","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":"Eutrophication impacts on seasonal endocrine disrupting compounds (PAE and AP) accumulation in estuarine microplankton.","authors":"Frank Paolo Jay B Albarico, Chiu-Wen Chen, Yee Cheng Lim, Chih-Feng Chen, Ming-Huang Wang, Jia-Wei Cheng, Hernando P Bacosa, Cheng-Di Dong","doi":"10.1016/j.marpolbul.2024.117463","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117463","url":null,"abstract":"<p><p>Endocrine-disrupting compounds (EDCs), such as phthalate esters (PAE) and alkyl phenols (AP) in marine primary trophic levels, are still underexplored. We present their seasonal changes and the potential impacts of environmental factors during Summer (2022), Autumn (2022), and Spring (2023) in a polluted environment. Plankton samples (55-1000 μm) were collected in duplicate, processed for PAE and AP solvent extraction, and analyzed using Gas Chromatography-Mass Spectrometry. All PAEs and APs, except di-isodecyl phthalate, were detected in plankton through seasons, ranging between 3276 and 134,436 and 3.27-12,101 ng/g dw, respectively. The composition was dominated by di-isononyl phthalate (DiNP), di-(2-ethylhexyl) phthalate (DEHP), and nonylphenols (NP), ranging between 207 and 117,861, 793-13,224, and 3.27-12,050 ng/g dw, respectively. Rivers primarily drive EDC distribution in microplankton, with eutrophication and suspended matter potentially influencing their seasonal changes. This study presents EDC seasonal dynamics in marine microplankton and the potential impacts of environmental changes.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117463"},"PeriodicalIF":5.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854446","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 trend of ecological risk caused by copper sediment in Quintero Bay, Chile, associated with a copper smelter and refinery.","authors":"Francisco Encina-Montoya, Elisa Ramírez-Sánchez, Carlos Oberti-Grassau, Carla Gallardo, Carlos Arias-Melgarejo, Carlos Esse, Sandor Mulsow, Patricia Mejias-Lagos, Rolando Vega-Aguayo","doi":"10.1016/j.marpolbul.2024.117410","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117410","url":null,"abstract":"<p><p>The Ventanas copper smelter began its activities in Quintero Bay in 1960, and it is estimated that it has released around 152 tons of copper per year into the waters of the bay since then. The increasing copper concentrations in the sediments exceed international standards and pose a potential danger for marine fauna. The object of this work carries out a present and historical ecological risk assessment of copper concentrations in the marine sediment of Quintero Bay. Copper concentration profiles in sediments from the bay were studied to compare present concentration data with a chronological estimate obtained using the 210Pb excess activity age model. A protective value of HC₅ of 338 mg kg-1 and a PNEC of 33.8 mg kg-1 were estimated. The results showed a background concentration before 1964 with no ecological risk (30.3 mg kg-1; RQ < 1); subsequently, the concentration was found to increase from 45.2 mg kg-1 in 1964 to a maximum of 85.4 mg kg-1 in 1990, with RQ values between 1.3 and 2.5. Concentrations in sediments over the period 1997-2022 presented maximum values between 70 and 283.6 mg kg-1. The ecological risk characterization showed that all sites presented a risk to biodiversity (RQ > 1), with a probability of occurrence of 0.44-77.56 %. This research highlights the need to develop quality standards that consider the sensitivity of local species, and to use the ecological risk assessment methodology to support business management and reduce the environmental impact in industrial areas such as Quintero.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117410"},"PeriodicalIF":5.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854461","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":"Differential prevalence of arsenic speciation in the kelps Laminaria digitata and L. hyperborea.","authors":"Andrea Raab, Dagmar B Stengel, Jörg Feldmann","doi":"10.1016/j.marpolbul.2024.117473","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117473","url":null,"abstract":"<p><p>Large variability in highly toxic inorganic arsenic (iAs) has previously been reported for the kelp Laminaria digitata. This study aimed to compare iAs concentrations in two morphologically similar kelps species (L. digitata and L. hyperborea). Both species contained similarly high total arsenic concentrations. However, whilst L. hyperborea contained only trace levels of iAs (0.363 ± 0.161 mg/kg), iAs constituted the majority of arsenic species in L. digitata (61.6 ± 18.7 mg/kg). Since the identification of iAs relies on retention time of the arsenic species, co-elution of any other organoarsenicals was checked by determination of arsenosugars using HPLC-ICPMS and ESI-HR-MS. Additionally, hydride generation ICP-MS gave comparable results to HPLC-ICPMS analyses. Overall, given the previously observed variability in iAs within and across kelp biomass, and the possibility of commercial processing of mixed-species kelp biomass that may include L. digitata, it may be advisable to verify iAs concentration regularly in seaweed batches destined for any application that exposes humans or animals to risks associated with As toxicity.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117473"},"PeriodicalIF":5.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854441","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":"Adverse effects of total phosphate load from the environment on the skeletal formation of coral juveniles.","authors":"Mariko Iijima, Ko Yasumoto, Jun Yasumoto, Akira Iguchi, Mina Yasumoto-Hirose, Kanami Mori-Yasumoto, Nanami Mizusawa, Mitsuru Jimbo, Kazuhiko Sakai, Atsushi Suzuki, Shugo Watabe","doi":"10.1016/j.marpolbul.2024.117395","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117395","url":null,"abstract":"<p><p>Nitrogen's impact on corals has been widely studied, but the role of phosphate is often overlooked due to its low concentrations in seawater. Previous studies have suggested that phosphate can penetrate intercellular spaces to reach the extracellular calcifying medium (ECM), where it adsorbs onto skeletal surfaces and disrupts calcium carbonate crystallization, thereby inhibiting skeletal growth. Based on this mechanism, we hypothesized that skeletal growth inhibition depends not only on phosphate concentration but also on total phosphate load (flow volume × concentration). To test this hypothesis, we conducted experiments in which coral juveniles were cultured under conditions where phosphate concentrations as low as 0.5 μM and daily seawater exchanges of 0.9 L significantly inhibited skeletal formation. Furthermore, increasing the flow volume of phosphate-enriched seawater exacerbated calcification impairment. These findings underscore the importance of evaluating both phosphate concentration and total phosphate load when assessing phosphate pollution in natural environments.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117395"},"PeriodicalIF":5.3,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142854417","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}