Pub Date : 2025-02-03DOI: 10.1016/j.marpolbul.2025.117614
Varsha Bohra , Kaze King-Yip Lai , Kit-Ling Lam , Nora Fung-Yee Tam , Steven Jing-liang , Fred Wang-Fat Lee
Present research employed metagenomics to explore the structural and functional diversity of microorganisms in two matrices of pneumatophore: adhered sediments (PS) and epiphytes (PE) of Avicennia marina. These were compared with microorganisms in surrounding environments: tidal water (TW), mudflat sediment (MF) and mangrove sediment (MS). Results revealed that bacteria made up over 95 % of the microbial community across all five matrices, with the dominance of phylum Proteobacteria, because of their metabolic flexibility and ability to survive in harsh mangrove environment. The bacterial community in PS and PE were similar to TW but differed from those in MF and MS, implying their provenance from TW. The high relative abundance of genes involved in nitrate and sulfur reduction pathways in PS and PE indicates pneumatophore bacteria helps in enhancing nitrogen and sulfur availability. This study is the first to explore the functional significance of pneumatophore-adhered prokaryotic communities using metagenomics.
{"title":"Metagenomic surveillance reveals different structure and function of microbial community associated with mangrove pneumatophores and their surrounding matrices","authors":"Varsha Bohra , Kaze King-Yip Lai , Kit-Ling Lam , Nora Fung-Yee Tam , Steven Jing-liang , Fred Wang-Fat Lee","doi":"10.1016/j.marpolbul.2025.117614","DOIUrl":"10.1016/j.marpolbul.2025.117614","url":null,"abstract":"<div><div>Present research employed metagenomics to explore the structural and functional diversity of microorganisms in two matrices of pneumatophore: adhered sediments (PS) and epiphytes (PE) of <em>Avicennia marina</em>. These were compared with microorganisms in surrounding environments: tidal water (TW), mudflat sediment (MF) and mangrove sediment (MS). Results revealed that bacteria made up over 95 % of the microbial community across all five matrices, with the dominance of phylum Proteobacteria, because of their metabolic flexibility and ability to survive in harsh mangrove environment. The bacterial community in PS and PE were similar to TW but differed from those in MF and MS, implying their provenance from TW. The high relative abundance of genes involved in nitrate and sulfur reduction pathways in PS and PE indicates pneumatophore bacteria helps in enhancing nitrogen and sulfur availability. This study is the first to explore the functional significance of pneumatophore-adhered prokaryotic communities using metagenomics.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117614"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077675","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}
Pub Date : 2025-02-03DOI: 10.1016/j.marpolbul.2024.117525
C.G. Mayorga Adame , J. Gacutan , B. Charlesworth , M. Roughan
Marine plastic pollution poses a global environmental challenge, understanding dispersal patterns at management-relevant scales is required to inform effective actions. We combine high-resolution oceanographic modelling and particle tracking with empirical data from Australia's largest marine debris database to investigate plastic debris transport across southeastern Australia. Our results challenge the assumption that marine debris primarily originates from distant sources, revealing that source regions are predominantly confined within a 15-km coastal band, with 50% of the debris modelled only spending 8 days at sea, and originating (on average) 20-km away. A comparison of empirically-informed simulations with uniform seeding scenarios shows significant differences in the number and intensity of identified marine source hotspots of plastic debris across the coastal band. These findings emphasize the importance of local management strategies and demonstrate how integrating observational data with oceanographic modelling can enhance our understanding of marine debris dynamics, ultimately supporting more targeted pollution reduction efforts.
{"title":"Unravelling coastal plastic pollution dynamics along southeastern Australia: Insights from oceanographic modelling informed by empirical data","authors":"C.G. Mayorga Adame , J. Gacutan , B. Charlesworth , M. Roughan","doi":"10.1016/j.marpolbul.2024.117525","DOIUrl":"10.1016/j.marpolbul.2024.117525","url":null,"abstract":"<div><div>Marine plastic pollution poses a global environmental challenge, understanding dispersal patterns at management-relevant scales is required to inform effective actions. We combine high-resolution oceanographic modelling and particle tracking with empirical data from Australia's largest marine debris database to investigate plastic debris transport across southeastern Australia. Our results challenge the assumption that marine debris primarily originates from distant sources, revealing that source regions are predominantly confined within a 15-km coastal band, with 50% of the debris modelled only spending 8 days at sea, and originating (on average) 20-km away. A comparison of empirically-informed simulations with uniform seeding scenarios shows significant differences in the number and intensity of identified marine source hotspots of plastic debris across the coastal band. These findings emphasize the importance of local management strategies and demonstrate how integrating observational data with oceanographic modelling can enhance our understanding of marine debris dynamics, ultimately supporting more targeted pollution reduction efforts.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117525"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176638","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}
Pub Date : 2025-02-03DOI: 10.1016/j.marpolbul.2025.117606
Mark Ariel D. Malto , Yee Cheng Lim , Chiu-Wen Chen , Ming-Huang Wang , Chih-Feng Chen , Frank Paolo Jay B. Albarico , Cheng-Di Dong
Metal pollution in harbors has long threatened coastal ecosystems. However, elucidating their bioaccumulation and diffusion impacts is challenging due to complex marine communities—with zooplankton as an indicator. Metals in seawater, suspended particulate matter, and isolated zooplankton groups were analyzed using inductively coupled plasma mass spectrometry. As hypothesized, metals were significantly bioaccumulated by zooplankton (log BCF > 3.7). Seawater metal distribution was homogenous, while suspended particulate matter (SPM) showed wider variations, both having high Metal Pollution Index (MPI) levels along harbor entrances. Bioaccumulation in zooplankton groups varied significantly, with Fe, Cu, Zn, and Cd being the most bioaccumulative. The abundance and dominance of copepods drive metal accumulation in bulk zooplankton communities, with decreasing patterns towards the sea. This highlights the impact of harbor activities on metal diffusion and the potential long-range transport of pollutants, which is crucial for developing ecological monitoring — highlighting the role of dominant zooplankton groups in driving metal distribution.
{"title":"Disentangling metal diffusion from a highly industrial harbor and its bioaccumulation in different zooplankton groups","authors":"Mark Ariel D. Malto , Yee Cheng Lim , Chiu-Wen Chen , Ming-Huang Wang , Chih-Feng Chen , Frank Paolo Jay B. Albarico , Cheng-Di Dong","doi":"10.1016/j.marpolbul.2025.117606","DOIUrl":"10.1016/j.marpolbul.2025.117606","url":null,"abstract":"<div><div>Metal pollution in harbors has long threatened coastal ecosystems. However, elucidating their bioaccumulation and diffusion impacts is challenging due to complex marine communities—with zooplankton as an indicator. Metals in seawater, suspended particulate matter, and isolated zooplankton groups were analyzed using inductively coupled plasma mass spectrometry. As hypothesized, metals were significantly bioaccumulated by zooplankton (log BCF > 3.7). Seawater metal distribution was homogenous, while suspended particulate matter (SPM) showed wider variations, both having high Metal Pollution Index (MPI) levels along harbor entrances. Bioaccumulation in zooplankton groups varied significantly, with Fe, Cu, Zn, and Cd being the most bioaccumulative. The abundance and dominance of copepods drive metal accumulation in bulk zooplankton communities, with decreasing patterns towards the sea. This highlights the impact of harbor activities on metal diffusion and the potential long-range transport of pollutants, which is crucial for developing ecological monitoring — highlighting the role of dominant zooplankton groups in driving metal distribution.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"213 ","pages":"Article 117606"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176639","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}
Discarded cigarette butts (CBs) are a significant source of environmental pollution. In areas with large amounts of cigarette waste, environmental hazards may arise due to the leaching of chemicals from filters and smoked tobacco. Accurately estimating the number of CBs on beaches requires a standardized method. Additionally, estimating the release of metals from these pollutants can provide important insights into beach pollution. This study compares two sampling methods to estimate CB waste on recreational beaches and evaluate the potential release of metals. In this combined experimental and meta-analysis study, circular methods with diameters of 5, 10, and 15 m were compared to a Flood Accumulation Zone (FAZ) method (1 m by 10 m, parallel to the waterline). Systematic study methods and meta-analysis were applied to estimate the release of metals along the Caspian Sea beaches. The Kruskal-Wallis test revealed significant differences in the averages of at least one sampling method (P < 0.006). Follow-up Mann-Whitney U tests showed no significant differences among the circular methods, but all circular methods significantly differed from the FAZ method (P < 0.05). The difference between the circular methods was smaller than the difference with the FAZ method. The minimum and maximum metal concentrations, in micrograms per square meter of Caspian Sea beaches, were associated with mercury and manganese. Circular methods with different diameters did not significantly differ and are effective in reducing CB accumulation due to coastal waves and wind. These methods can be considered standard for estimating CBs on beaches. Cigarette waste acts as a point source of metal pollution, with rapid leaching of metals increasing the risk of acute harm to coastal and marine organisms.
{"title":"Assessing cigarette butt pollution on recreational beaches: A comparative study of two sampling methods and their impact on metal release","authors":"Kosar Kouhi , Akram Abbasi-Tajaddod , Fathollah Gholami-Borujeni","doi":"10.1016/j.marpolbul.2024.117416","DOIUrl":"10.1016/j.marpolbul.2024.117416","url":null,"abstract":"<div><div>Discarded cigarette butts (CBs) are a significant source of environmental pollution. In areas with large amounts of cigarette waste, environmental hazards may arise due to the leaching of chemicals from filters and smoked tobacco. Accurately estimating the number of CBs on beaches requires a standardized method. Additionally, estimating the release of metals from these pollutants can provide important insights into beach pollution. This study compares two sampling methods to estimate CB waste on recreational beaches and evaluate the potential release of metals. In this combined experimental and meta-analysis study, circular methods with diameters of 5, 10, and 15 m were compared to a Flood Accumulation Zone (FAZ) method (1 m by 10 m, parallel to the waterline). Systematic study methods and meta-analysis were applied to estimate the release of metals along the Caspian Sea beaches. The Kruskal-Wallis test revealed significant differences in the averages of at least one sampling method (<em>P</em> < 0.006). Follow-up Mann-Whitney <em>U</em> tests showed no significant differences among the circular methods, but all circular methods significantly differed from the FAZ method (<em>P</em> < 0.05). The difference between the circular methods was smaller than the difference with the FAZ method. The minimum and maximum metal concentrations, in micrograms per square meter of Caspian Sea beaches, were associated with mercury and manganese. Circular methods with different diameters did not significantly differ and are effective in reducing CB accumulation due to coastal waves and wind. These methods can be considered standard for estimating CBs on beaches. Cigarette waste acts as a point source of metal pollution, with rapid leaching of metals increasing the risk of acute harm to coastal and marine organisms.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117416"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142817899","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}
Pub Date : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117423
Seokyoon Jang , Mansik Choi , Youn-Joong Jeong , Dongjin Joe , Dasom Yang , Minjae Lee , Jinwoo Kim
The elemental and isotopic (δ65Cu and δ66Zn) characteristics of 34 AFP samples from 5 paint manufacturers, the isotopic fractionation during the dissolution of AFPs by seawater, and the subsequent adsorption of isotopes onto coastal fine-grained sediments were investigated to identify potential indicators (metal ratios and isotopes).
The δ65Cu and δ66Zn values for 34 AFPs could be divided into 2 groups regardless of the type of paint or manufacturer. Dissolution by seawater induced substantial fractionation but δ65Cu and δ66Zn approached the bulk AFP values when the leached fraction increased. The adsorption of metals onto marine sediments resulted in substantial fractionation (Δ65Cusoln-solid = 0.91 ± 0.30 ‰ and Δ66Zn = −0.14 ± 0.07 ‰), but the δ65Cu values in sediments were similar to those in bulk AFP because almost all of the Cu adsorbed to marine sediments within 12 h.
{"title":"Isotopic characteristics of antifouling paints and fractionation of Cu and Zn isotopes during dissolution by seawater and their adsorption to marine sediments","authors":"Seokyoon Jang , Mansik Choi , Youn-Joong Jeong , Dongjin Joe , Dasom Yang , Minjae Lee , Jinwoo Kim","doi":"10.1016/j.marpolbul.2024.117423","DOIUrl":"10.1016/j.marpolbul.2024.117423","url":null,"abstract":"<div><div>The elemental and isotopic (δ<sup>65</sup>Cu and δ<sup>66</sup>Zn) characteristics of 34 AFP samples from 5 paint manufacturers, the isotopic fractionation during the dissolution of AFPs by seawater, and the subsequent adsorption of isotopes onto coastal fine-grained sediments were investigated to identify potential indicators (metal ratios and isotopes).</div><div>The δ<sup>65</sup>Cu and δ<sup>66</sup>Zn values for 34 AFPs could be divided into 2 groups regardless of the type of paint or manufacturer. Dissolution by seawater induced substantial fractionation but δ<sup>65</sup>Cu and δ<sup>66</sup>Zn approached the bulk AFP values when the leached fraction increased. The adsorption of metals onto marine sediments resulted in substantial fractionation (Δ<sup>65</sup>Cu<sub>soln-solid</sub> = 0.91 ± 0.30 ‰ and Δ<sup>66</sup>Zn = −0.14 ± 0.07 ‰), but the δ<sup>65</sup>Cu values in sediments were similar to those in bulk AFP because almost all of the Cu adsorbed to marine sediments within 12 h.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117423"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864769","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}
Pub Date : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117485
Paulina Piskuła, Aleksander Astel, Magdalena Pawlik
Microplastics in seawater and fish from the Baltic Sea were analyzed. The significant contribution of the study is due to extensive collection of fish and surface water samples from corresponding fishing zones. Microplastics were detected in 100 % of seawater and 61 % of fish samples. The abundances of microplastics were 19,984 ± 8858 items/m3 (seawater) and 3.3 items/fish in the fish organs. The average dimension was 1.08 ± 1.19 mm (seawater), and 0.77 ± 0.84 mm (fish). In 106 out of 178 specimens (61 %), MPs were found in the gills (46 %), digestive tract (38 %), or liver (16 %). Fiber was the most dominant shape found in seawater (91.7 %) and fish (68.3 %), while the dominant color of items was blue. Items were mostly composed of polyethylene (21 %), polypropylene (20 %), cellophane (16 %), polyamide (9 %), and polyacrylate (8 %).
{"title":"Microplastics in seawater and fish acquired from the corresponding fishing zones of the Baltic Sea","authors":"Paulina Piskuła, Aleksander Astel, Magdalena Pawlik","doi":"10.1016/j.marpolbul.2024.117485","DOIUrl":"10.1016/j.marpolbul.2024.117485","url":null,"abstract":"<div><div>Microplastics in seawater and fish from the Baltic Sea were analyzed. The significant contribution of the study is due to extensive collection of fish and surface water samples from corresponding fishing zones. Microplastics were detected in 100 % of seawater and 61 % of fish samples. The abundances of microplastics were 19,984 ± 8858 items/m<sup>3</sup> (seawater) and 3.3 items/fish in the fish organs. The average dimension was 1.08 ± 1.19 mm (seawater), and 0.77 ± 0.84 mm (fish). In 106 out of 178 specimens (61 %), MPs were found in the gills (46 %), digestive tract (38 %), or liver (16 %). Fiber was the most dominant shape found in seawater (91.7 %) and fish (68.3 %), while the dominant color of items was blue. Items were mostly composed of polyethylene (21 %), polypropylene (20 %), cellophane (16 %), polyamide (9 %), and polyacrylate (8 %).</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117485"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874133","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}
Pub Date : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117470
C. Andolina , G. Cilluffo , V. Zammuto , G. Signa , M. Papale , A. Lo Giudice , R. Di Leonardo , V. Costa , L. Ciriminna , A. Tomasello , C. Gugliandolo , S. Vizzini
Volcanic emissions in shallow vents influence the biogeochemistry of the sedimentary compartment, creating marked abiotic gradients. We assessed the spatial dynamics of the sediment compartment, as for the composition and origin of organic matter and associated prokaryotic community, in a volcanic shallow CO2 vent (Vulcano Island, Italy). Based on elemental (carbon, nitrogen content and their ratio) and isotopic composition (δ13C, δ15N and δ34S), the contribution of vent-derived organic matter (microbial mats) to sedimentary organic matter was high close to the vent, while the marine-derived end-members (seagrasses) contributed highly at increasing distance. Chemoautotrophic Campylobacterota and hyperthermophilic Achaea prevailed close to the vent, whilst phototrophic and chemoheterotrophic members dominated at increasing distance. Abiotic gradients generated by the volcanic CO2 vent drive relevant changes in the composition, origin and nutritional quality of sedimentary organic matter, and influence the structure and complexity of associated prokaryotic communities, with expected relevant impact on the entire food-web.
{"title":"Extreme abiotics drive sediment biocomplexity along pH gradients in a shallow submarine volcanic vent","authors":"C. Andolina , G. Cilluffo , V. Zammuto , G. Signa , M. Papale , A. Lo Giudice , R. Di Leonardo , V. Costa , L. Ciriminna , A. Tomasello , C. Gugliandolo , S. Vizzini","doi":"10.1016/j.marpolbul.2024.117470","DOIUrl":"10.1016/j.marpolbul.2024.117470","url":null,"abstract":"<div><div>Volcanic emissions in shallow vents influence the biogeochemistry of the sedimentary compartment, creating marked abiotic gradients. We assessed the spatial dynamics of the sediment compartment, as for the composition and origin of organic matter and associated prokaryotic community, in a volcanic shallow CO<sub>2</sub> vent (Vulcano Island, Italy). Based on elemental (carbon, nitrogen content and their ratio) and isotopic composition (δ<sup>13</sup>C, δ<sup>15</sup>N and δ<sup>34</sup>S), the contribution of vent-derived organic matter (microbial mats) to sedimentary organic matter was high close to the vent, while the marine-derived end-members (seagrasses) contributed highly at increasing distance. Chemoautotrophic <em>Campylobacterota</em> and hyperthermophilic <em>Achaea</em> prevailed close to the vent, whilst phototrophic and chemoheterotrophic members dominated at increasing distance. Abiotic gradients generated by the volcanic CO<sub>2</sub> vent drive relevant changes in the composition, origin and nutritional quality of sedimentary organic matter, and influence the structure and complexity of associated prokaryotic communities, with expected relevant impact on the entire food-web.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117470"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874137","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}
Pub Date : 2025-02-01Epub Date: 2024-12-17DOI: 10.1016/j.marpolbul.2024.117472
Marjan Esmaeilzadeh, Ali Mehdinia
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.
{"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":"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<sup>- 1</sup>, with an average of 60.59 ng·g<sup>- 1</sup>. 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":"2025-02-01","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":"Corrigendum to \"Investigation of water quality in the shallow coastal waters of the Persian Gulf\" [Mar. Pollut. Bull. 209 PB (2024) 117263].","authors":"Hossein Barkhordar, Gholamreza Mohammadpour, Smaeyl Hassanzadeh","doi":"10.1016/j.marpolbul.2024.117482","DOIUrl":"10.1016/j.marpolbul.2024.117482","url":null,"abstract":"","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":" ","pages":"117482"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872457","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}
Pub Date : 2025-02-01Epub Date: 2025-01-29DOI: 10.1016/j.marpolbul.2025.117536
Haodong Xu, Yoshimasa Matsumura, Rei Yamashita, Hideyuki Nakano, Shin-Ichi Ito
Marine plastic pollution has been a public concern for many decades; however, transport processes of heavy microplastics to the seafloor have long been overlooked given the difficulties in sampling and modeling. The distribution of heavy microplastic deposition on the seafloor in the North Pacific for 65 years since 1951, was estimated using a particle tracking model with 577,143,840 particles. The model revealed that 22 % of heavy microplastics were deposited over 100 km offshore from their release locations. Strong currents, including the Kuroshio Current and Equatorial Counter Current, advected the heavy microplastics offshore; however, the behaviors of different-sized microplastics with different sinking velocities made the seafloor deposition heterogeneous. The seafloor was separated into six (three) clusters based on the origins (composition of sinking velocity categories) of the deposited microplastics. Deposited microplastics showed a rapid increase since the 2000s even for the open ocean far from emission sources.
{"title":"Heterogeneous seafloor deposition of heavy microplastics in the North Pacific estimated over 65 years.","authors":"Haodong Xu, Yoshimasa Matsumura, Rei Yamashita, Hideyuki Nakano, Shin-Ichi Ito","doi":"10.1016/j.marpolbul.2025.117536","DOIUrl":"10.1016/j.marpolbul.2025.117536","url":null,"abstract":"<p><p>Marine plastic pollution has been a public concern for many decades; however, transport processes of heavy microplastics to the seafloor have long been overlooked given the difficulties in sampling and modeling. The distribution of heavy microplastic deposition on the seafloor in the North Pacific for 65 years since 1951, was estimated using a particle tracking model with 577,143,840 particles. The model revealed that 22 % of heavy microplastics were deposited over 100 km offshore from their release locations. Strong currents, including the Kuroshio Current and Equatorial Counter Current, advected the heavy microplastics offshore; however, the behaviors of different-sized microplastics with different sinking velocities made the seafloor deposition heterogeneous. The seafloor was separated into six (three) clusters based on the origins (composition of sinking velocity categories) of the deposited microplastics. Deposited microplastics showed a rapid increase since the 2000s even for the open ocean far from emission sources.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":" ","pages":"117536"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143066791","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}
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