Pub Date : 2025-02-27DOI: 10.1016/j.marpolbul.2025.117712
Astrid E. Delorme , Olivier B. Poirion , Laurent Lebreton , Pierre-Yves le Gac , Kimeona Kāne , Sarah-Jeanne Royer
Global models estimate that two-thirds of floating ocean plastic has accumulated in coastal areas since the 1950s, with Hawaiʻi's windward shores particularly vulnerable due to their proximity to the North Pacific Garbage Patch. Our quarterly surveys revealed that 91 % of recovered plastic particles were buried below the surface (deeper than 2 cm), with most particles being small fragments (93 %) with an average mean max length of 6.7 ± 4.4 mm. This study offers new insights into subsurface plastic, exposing a previously hidden vertical distribution of plastic pollution. We observed significant variations in plastic abundance across depths, beaches, and sampling periods, along with a positive correlation between particle size and sand grain size. Additionally, through reconciliation science, we critically reflect on the cultural impacts of our research, emphasizing the importance of aligning plastic pollution studies with local community values and environmental stewardship.
{"title":"A year-long field study of buried plastics reveals underestimation of plastic pollution on Hawaiian beaches","authors":"Astrid E. Delorme , Olivier B. Poirion , Laurent Lebreton , Pierre-Yves le Gac , Kimeona Kāne , Sarah-Jeanne Royer","doi":"10.1016/j.marpolbul.2025.117712","DOIUrl":"10.1016/j.marpolbul.2025.117712","url":null,"abstract":"<div><div>Global models estimate that two-thirds of floating ocean plastic has accumulated in coastal areas since the 1950s, with Hawaiʻi's windward shores particularly vulnerable due to their proximity to the North Pacific Garbage Patch. Our quarterly surveys revealed that 91 % of recovered plastic particles were buried below the surface (deeper than 2 cm), with most particles being small fragments (93 %) with an average mean max length of 6.7 ± 4.4 mm. This study offers new insights into subsurface plastic, exposing a previously hidden vertical distribution of plastic pollution. We observed significant variations in plastic abundance across depths, beaches, and sampling periods, along with a positive correlation between particle size and sand grain size. Additionally, through reconciliation science, we critically reflect on the cultural impacts of our research, emphasizing the importance of aligning plastic pollution studies with local community values and environmental stewardship.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117712"},"PeriodicalIF":5.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508053","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 : 2025-02-27DOI: 10.1016/j.marpolbul.2025.117756
Li Yang , Rui Pan , Shuang Wang , Zhangyan Zhu , Hongshan Li , Ruiping Yang , Xiaoping Sun , Baoming Ge
Spartina alterniflora has significantly altered coastal ecosystems. Understanding macrofaunal responses to its invasion is crucial for managing coastal wetlands. Five invasion stages over 16 years were analyzed: no invasion, initial, young, mature, and senescing. Macrofaunal biodiversity initially increased but later declined. Environmental properties varied by stages, creating distinct habitats. The impact on macrofauna depended on species traits and invasion stage. Key species accounting for 49.54 % of dissimilarity were Stenothyra glabra, Bullacta caurina, Pseudomphala latericea, and Potamocorbula laevis. Trophic structure initially remained stable but shifted later. Organic carbon (OC), total nitrogen (TN), and C/N ratio correlated with S. alterniflora development. Height of S. alterniflora was a key environmental indicator, while OC content and C/N ratio were crucial for shaping the macrofaunal community, indicating food source changes. This study provides valuable insights for managing coastal environments.
{"title":"Macrofaunal biodiversity and trophic structure varied in response to changing environmental properties along the Spartina alterniflora invasion stages","authors":"Li Yang , Rui Pan , Shuang Wang , Zhangyan Zhu , Hongshan Li , Ruiping Yang , Xiaoping Sun , Baoming Ge","doi":"10.1016/j.marpolbul.2025.117756","DOIUrl":"10.1016/j.marpolbul.2025.117756","url":null,"abstract":"<div><div><em>Spartina alterniflora</em> has significantly altered coastal ecosystems. Understanding macrofaunal responses to its invasion is crucial for managing coastal wetlands. Five invasion stages over 16 years were analyzed: no invasion, initial, young, mature, and senescing. Macrofaunal biodiversity initially increased but later declined. Environmental properties varied by stages, creating distinct habitats. The impact on macrofauna depended on species traits and invasion stage. Key species accounting for 49.54 % of dissimilarity were <em>Stenothyra glabra</em>, <em>Bullacta caurina</em>, <em>Pseudomphala latericea</em>, and <em>Potamocorbula laevis</em>. Trophic structure initially remained stable but shifted later. Organic carbon (OC), total nitrogen (TN), and C/N ratio correlated with <em>S. alterniflora</em> development. Height of <em>S. alterniflora</em> was a key environmental indicator, while OC content and C/N ratio were crucial for shaping the macrofaunal community, indicating food source changes. This study provides valuable insights for managing coastal environments.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117756"},"PeriodicalIF":5.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508430","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 : 2025-02-27DOI: 10.1016/j.marpolbul.2025.117732
Patrício Ramalhosa , João G. Monteiro , Sabine Rech , Ignacio Gestoso , Soledad Álvarez , Francesca Gizzi , Paola Parretti , Nuno Castro , Silvia Almeida , Jesús Lopez Jiménez , Macarena Ros , Cláudio Cardoso , Maria João Lima , Rui Caldeira , Joana I. Robalo , James T. Carlton , João Canning-Clode
Marine debris (MD) can be a transport vector for diverse marine communities, including non-indigenous species (NIS). This study assessed MD potential role as a substrate for colonization and dispersal vector for NIS in the Madeira Archipelago (NE Atlantic) by examining three MD categories: floating (FMD), seafloor (SMD), and beached (BMD). Opportunistic sampling, conducted in collaboration with local maritime stakeholders, documented MD sightings with photographs and GPS coordinates. A total of 92 MD items were inspected, revealing 108 fouling species across 11 phyla, with 13 % identified as NIS. SMD exhibited the highest proportion of NIS (9.6 %), followed by BMD (4.4 %) and FMD (3.9 %). Notably, the study provides evidence that FMD functions as both a substrate and a dispersal vector for NIS in Madeira waters. Combining biogeographic analyses, oceanographic modelling, and MD identification marks, this study highlighted the North Atlantic Subtropical Gyre's currents as key pathways, transporting MD items from the Wider Caribbean, the North American east coast, and the Iberian Peninsula to Madeira within 2–3 years. These findings emphasize Madeira's dual role as both a recipient and exporter of MD, with implications for NIS introductions and secondary spread. This study underscores the urgent need for standardized monitoring, stakeholder engagement, and proactive MD management strategies to mitigate NIS introductions and protect sensitive marine ecosystems like Macaronesia from the ecological risks of biological invasions.
{"title":"The role of marine debris as a vector, dispersal agent, and substrate for non-indigenous species on Oceanic Islands (Northeast Atlantic)","authors":"Patrício Ramalhosa , João G. Monteiro , Sabine Rech , Ignacio Gestoso , Soledad Álvarez , Francesca Gizzi , Paola Parretti , Nuno Castro , Silvia Almeida , Jesús Lopez Jiménez , Macarena Ros , Cláudio Cardoso , Maria João Lima , Rui Caldeira , Joana I. Robalo , James T. Carlton , João Canning-Clode","doi":"10.1016/j.marpolbul.2025.117732","DOIUrl":"10.1016/j.marpolbul.2025.117732","url":null,"abstract":"<div><div>Marine debris (MD) can be a transport vector for diverse marine communities, including non-indigenous species (NIS). This study assessed MD potential role as a substrate for colonization and dispersal vector for NIS in the Madeira Archipelago (NE Atlantic) by examining three MD categories: floating (FMD), seafloor (SMD), and beached (BMD). Opportunistic sampling, conducted in collaboration with local maritime stakeholders, documented MD sightings with photographs and GPS coordinates. A total of 92 MD items were inspected, revealing 108 fouling species across 11 phyla, with 13 % identified as NIS. SMD exhibited the highest proportion of NIS (9.6 %), followed by BMD (4.4 %) and FMD (3.9 %). Notably, the study provides evidence that FMD functions as both a substrate and a dispersal vector for NIS in Madeira waters. Combining biogeographic analyses, oceanographic modelling, and MD identification marks, this study highlighted the North Atlantic Subtropical Gyre's currents as key pathways, transporting MD items from the Wider Caribbean, the North American east coast, and the Iberian Peninsula to Madeira within 2–3 years. These findings emphasize Madeira's dual role as both a recipient and exporter of MD, with implications for NIS introductions and secondary spread. This study underscores the urgent need for standardized monitoring, stakeholder engagement, and proactive MD management strategies to mitigate NIS introductions and protect sensitive marine ecosystems like Macaronesia from the ecological risks of biological invasions.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117732"},"PeriodicalIF":5.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508045","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 : 2025-02-27DOI: 10.1016/j.marpolbul.2025.117687
Sukhjit Singh, Fabio Ballini
Maritime transportation and other port-related services directly or indirectly contribute to the social and economic growth of the economy. Small Island Developing States (SIDS), due to their geographic isolation, depend heavily on maritime transport to support various aspects of their livelihoods and trade, including food and energy security, disaster response, and sustainable development among others. However, mitigating GHG (greenhouse gas) emissions from maritime transport continues to be a major challenge. The ambition in the 2023 IMO Strategy on the reduction of GHG emissions from ships includes net-zero GHG emissions from international shipping by or around, i.e., close to, 2050 compared to 2008 levels. Maritime shipping must implement a range of short-, mid-, and long-term measures to achieve decarbonization ambitions. While the impact of these measures on overall maritime transport costs is still emerging, it is crucial to examine their implications for the sustainable development of developing economies, particularly Small Island Developing States (SIDS).
The paper presents a systematic literature review (SLR) examining the social and economic impact of maritime GHG emission control measures on sustainable development. The review reveals a lack of research on the social implications of maritime decarbonization measures for developing countries, especially SIDS. The study identifies the need for a comprehensive assessment of maritime GHG emissions reduction measures against all sustainable development goals (SDGs) to identify existing trade-offs for strategic integration. The respective national action plans (NAP) and maritime transport policy must anticipate these implications. Enhancing the intersectoral collaboration may uncover opportunities to advance SDGs and address complex sustainability challenges within SIDS. In addition, by addressing the identified research gap policymakers can make more informed choices and benefit from the policy framework that will foster innovative pathways.
{"title":"Socio-economic impacts of maritime GHG emission control measures on sustainable development in SIDS: Insights from a systematic literature review","authors":"Sukhjit Singh, Fabio Ballini","doi":"10.1016/j.marpolbul.2025.117687","DOIUrl":"10.1016/j.marpolbul.2025.117687","url":null,"abstract":"<div><div>Maritime transportation and other port-related services directly or indirectly contribute to the social and economic growth of the economy. Small Island Developing States (SIDS), due to their geographic isolation, depend heavily on maritime transport to support various aspects of their livelihoods and trade, including food and energy security, disaster response, and sustainable development among others. However, mitigating GHG (greenhouse gas) emissions from maritime transport continues to be a major challenge. The ambition in the 2023 IMO Strategy on the reduction of GHG emissions from ships includes net-zero GHG emissions from international shipping by or around, i.e., close to, 2050 compared to 2008 levels. Maritime shipping must implement a range of short-, mid-, and long-term measures to achieve decarbonization ambitions. While the impact of these measures on overall maritime transport costs is still emerging, it is crucial to examine their implications for the sustainable development of developing economies, particularly Small Island Developing States (SIDS).</div><div>The paper presents a systematic literature review (SLR) examining the social and economic impact of maritime GHG emission control measures on sustainable development. The review reveals a lack of research on the social implications of maritime decarbonization measures for developing countries, especially SIDS. The study identifies the need for a comprehensive assessment of maritime GHG emissions reduction measures against all sustainable development goals (SDGs) to identify existing trade-offs for strategic integration. The respective national action plans (NAP) and maritime transport policy must anticipate these implications. Enhancing the intersectoral collaboration may uncover opportunities to advance SDGs and address complex sustainability challenges within SIDS. In addition, by addressing the identified research gap policymakers can make more informed choices and benefit from the policy framework that will foster innovative pathways.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117687"},"PeriodicalIF":5.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508213","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 : 2025-02-27DOI: 10.1016/j.marpolbul.2025.117715
Long Zhou , Jingxi Li , Chang Zhao , Jiaxuan Yin , Jinfeng Ding , Wei Cao , Wei Fan
Microplastics are ubiquitous globally, posing a significant threat to human health. Notably, the Indian Ocean ranks second in microplastic contamination, emerging as a major source of pollution. In response to this risk, neighboring countries are actively addressing severe plastic pollution and deficiencies in waste management. Research on microplastics in Indian Ocean seawater commenced in 2016. This paper reviews the research status and trends, detailing sampling, extraction, and identification methods. We categorize 43 studies by trawl sampling and other techniques, summarizing microplastic abundance, size, shape, color, and polymer types. Microplastic distribution varies widely in the Indian Ocean, peaking in the East, West, and along the Indian coast. Fiber and debris microplastics are the most, the main colors are black, blue, white and transparent, and the polymer types are mainly PE, PP and PS. Oceanic convergence intensity affects microplastic distribution globally, intensifying accumulation. This study highlights the need for standardized microplastic sampling and analysis in Indian Ocean countries. Collaborative surveys and investigations are crucial to addressing pollution.
{"title":"Overview of monitoring methods and environmental distribution: Microplastics in the Indian Ocean","authors":"Long Zhou , Jingxi Li , Chang Zhao , Jiaxuan Yin , Jinfeng Ding , Wei Cao , Wei Fan","doi":"10.1016/j.marpolbul.2025.117715","DOIUrl":"10.1016/j.marpolbul.2025.117715","url":null,"abstract":"<div><div>Microplastics are ubiquitous globally, posing a significant threat to human health. Notably, the Indian Ocean ranks second in microplastic contamination, emerging as a major source of pollution. In response to this risk, neighboring countries are actively addressing severe plastic pollution and deficiencies in waste management. Research on microplastics in Indian Ocean seawater commenced in 2016. This paper reviews the research status and trends, detailing sampling, extraction, and identification methods. We categorize 43 studies by trawl sampling and other techniques, summarizing microplastic abundance, size, shape, color, and polymer types. Microplastic distribution varies widely in the Indian Ocean, peaking in the East, West, and along the Indian coast. Fiber and debris microplastics are the most, the main colors are black, blue, white and transparent, and the polymer types are mainly PE, PP and PS. Oceanic convergence intensity affects microplastic distribution globally, intensifying accumulation. This study highlights the need for standardized microplastic sampling and analysis in Indian Ocean countries. Collaborative surveys and investigations are crucial to addressing pollution.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117715"},"PeriodicalIF":5.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508052","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 : 2025-02-26DOI: 10.1016/j.marpolbul.2025.117743
P. Karthikeyan, Jasmine Singha, S.R. Marigoudar, M. Savurirajan, P. Raja, K.V. Sharma
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 Oithona similis 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 in-vivo 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 in-vitro 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.
{"title":"Impact of cadmium on copepod Oithona similis at threshold concentrations: Determining safe exposure period","authors":"P. Karthikeyan, Jasmine Singha, S.R. Marigoudar, M. Savurirajan, P. Raja, 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}
Pub Date : 2025-02-26DOI: 10.1016/j.marpolbul.2025.117740
Xiongfei Meng , Shimeng Chen , Lanjun Sun , Bozhen Liu , Baoshan Ma , Yanpeng Qu , Yongxin Song , Dongqing Li
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.
{"title":"Identification of marine microplastics by a combined method of principal component analysis and random forest for fluorescence spectrum processing","authors":"Xiongfei Meng , Shimeng Chen , Lanjun Sun , Bozhen Liu , Baoshan Ma , Yanpeng Qu , Yongxin Song , 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}
Pub Date : 2025-02-26DOI: 10.1016/j.marpolbul.2025.117714
Jianyin Huang , Orlando Lam-Gordillo , Luke M. Mosley , Christopher Keneally , Justin Brookes , David T. Welsh
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 Ruppia tuberosa (hereafter called Ruppia). 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 Ruppia and microphytobenthos. The site colonised by Ruppia 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.
{"title":"Understanding sediment nutrient cycling in a hypersaline coastal lagoon using hydrogel-based passive sampling techniques","authors":"Jianyin Huang , Orlando Lam-Gordillo , Luke M. Mosley , Christopher Keneally , Justin Brookes , 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}
Pub Date : 2025-02-26DOI: 10.1016/j.marpolbul.2025.117718
Min Kim , Hojun Choi , Jinhyung Chon
Offshore wind farms are expanding rapidly as a clean energy solution but raise concerns about light-related environmental impacts, such as shadow flicker and light pollution, affecting ecosystems and human communities. This study assesses the light environmental impacts of offshore wind farms in South Korea, specifically evaluating daytime shadow flicker and nighttime light pollution, and proposes mitigation strategies tailored to diverse landscape contexts. Using advanced geospatial tools, including QGIS and WindPRO, light-related disturbances were analyzed across three representative sites: Aphae (rural), Jangbogo (island), and Dadaepo (urban). Shadow flicker exposure was quantified based on turbine specifications, solar dynamics, and observer locations, while light pollution from aviation obstruction lights was assessed through spatial luminance analysis. The Aphae site exhibited the highest shadow flicker exposure, with up to 154 days annually and 79 h per year in some regions, while Dadaepo's urban zone displayed moderate impacts, particularly in tourist areas like Molundae Observatory. Jangbogo experienced negligible effects due to natural buffering and greater separation distances. Light pollution intensity correlated with proximity and turbine visibility, with 8–13 turbines visible in highly impacted zones. Tailored mitigation strategies, such as optimized turbine placement, green buffers, zoning regulations, and habitat preservation, are essential to minimizing adverse impacts. This research underscores the need for location-sensitive planning to achieve sustainable offshore wind energy development while safeguarding ecological and human well-being.
{"title":"Assessment of light environmental impacts from offshore wind farms in South Korea","authors":"Min Kim , Hojun Choi , Jinhyung Chon","doi":"10.1016/j.marpolbul.2025.117718","DOIUrl":"10.1016/j.marpolbul.2025.117718","url":null,"abstract":"<div><div>Offshore wind farms are expanding rapidly as a clean energy solution but raise concerns about light-related environmental impacts, such as shadow flicker and light pollution, affecting ecosystems and human communities. This study assesses the light environmental impacts of offshore wind farms in South Korea, specifically evaluating daytime shadow flicker and nighttime light pollution, and proposes mitigation strategies tailored to diverse landscape contexts. Using advanced geospatial tools, including QGIS and WindPRO, light-related disturbances were analyzed across three representative sites: Aphae (rural), Jangbogo (island), and Dadaepo (urban). Shadow flicker exposure was quantified based on turbine specifications, solar dynamics, and observer locations, while light pollution from aviation obstruction lights was assessed through spatial luminance analysis. The Aphae site exhibited the highest shadow flicker exposure, with up to 154 days annually and 79 h per year in some regions, while Dadaepo's urban zone displayed moderate impacts, particularly in tourist areas like Molundae Observatory. Jangbogo experienced negligible effects due to natural buffering and greater separation distances. Light pollution intensity correlated with proximity and turbine visibility, with 8–13 turbines visible in highly impacted zones. Tailored mitigation strategies, such as optimized turbine placement, green buffers, zoning regulations, and habitat preservation, are essential to minimizing adverse impacts. This research underscores the need for location-sensitive planning to achieve sustainable offshore wind energy development while safeguarding ecological and human well-being.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"214 ","pages":"Article 117718"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508051","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 : 2025-02-26DOI: 10.1016/j.marpolbul.2025.117731
Feifei Li , Lyujun Chen , Zhiguo Su , Yuhan Zheng , Feng Cao , Wendy Yang , Donghui Wen
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 (Kd). 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.
{"title":"Historical distribution and multi-dimensional environmental risk assessments of antibiotics in coastal sediments affected by land-based human activities","authors":"Feifei Li , Lyujun Chen , Zhiguo Su , Yuhan Zheng , Feng Cao , Wendy Yang , 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><sub>d</sub>). 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}
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