Pub Date : 2026-05-01Epub Date: 2026-02-11DOI: 10.1016/j.ocecoaman.2026.108134
Md. Simul Bhuyan , Maroua Jenzri , Md. Tarikul Islam , Diponkor Adikari , Md Minarul Hoque
Coral reefs are one of the ecosystems that are most affected by climate change, but they also support biodiversity, coastal stability, fisheries, and tourism around the world. This review uses a structured narrative literature review based on PRISMA protocols to put together evidence from 220 peer-reviewed articles (1996 to 2025) to see how warming seas, ocean acidification, rising sea levels, and stronger storms change coral ecology, structure, and ecosystem functioning. The results indicate that heightened thermal stress is the principal catalyst of mass bleaching and mortality, occurring with greater frequency and at larger spatial scales, whereas ongoing acidification persists in diminishing calcification, skeletal density, and recruitment success. The rise in sea level and damage caused by storms make habitat loss happen even faster, make reefs less complex, and make communities of reef-associated species less stable. Even though things are going this way, new interventions like coral gardening, larval propagation, assisted evolution, marine protected areas, and community-led co-management show promise for making things more resilient in the face of future climate change. The review emphasizes the necessity of immediate global carbon reduction in conjunction with customized conservation and restoration strategies at the local level. If no strong action is taken, coral reefs may not last long, and the economic security they provide may also go down.
{"title":"Climate change impacts on coral reefs and emerging resilience pathways: A systematic review","authors":"Md. Simul Bhuyan , Maroua Jenzri , Md. Tarikul Islam , Diponkor Adikari , Md Minarul Hoque","doi":"10.1016/j.ocecoaman.2026.108134","DOIUrl":"10.1016/j.ocecoaman.2026.108134","url":null,"abstract":"<div><div>Coral reefs are one of the ecosystems that are most affected by climate change, but they also support biodiversity, coastal stability, fisheries, and tourism around the world. This review uses a structured narrative literature review based on PRISMA protocols to put together evidence from 220 peer-reviewed articles (1996 to 2025) to see how warming seas, ocean acidification, rising sea levels, and stronger storms change coral ecology, structure, and ecosystem functioning. The results indicate that heightened thermal stress is the principal catalyst of mass bleaching and mortality, occurring with greater frequency and at larger spatial scales, whereas ongoing acidification persists in diminishing calcification, skeletal density, and recruitment success. The rise in sea level and damage caused by storms make habitat loss happen even faster, make reefs less complex, and make communities of reef-associated species less stable. Even though things are going this way, new interventions like coral gardening, larval propagation, assisted evolution, marine protected areas, and community-led co-management show promise for making things more resilient in the face of future climate change. The review emphasizes the necessity of immediate global carbon reduction in conjunction with customized conservation and restoration strategies at the local level. If no strong action is taken, coral reefs may not last long, and the economic security they provide may also go down.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108134"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-10DOI: 10.1016/j.ocecoaman.2026.108132
Beatriz Almonacil Fernández , María Luján Bustos , Teresa Vera San Martín , Mario Palacios Moreno , Daniela Hill Piedra , Dolores Astudillo Brocel
Cigarette butt contamination represents a significant and poorly known threat to coastal ecosystems. This study presents the experience of a citizen science project co-created in the commune of Ayangue (Ecuador), whose objective was to reduce and prevent cigarette butt contamination on the beach, promoting the active participation of children as agents of change. Through a participatory methodological approach, educational workshops, beach monitoring, environmental projects, and artistic activities were conducted. Three dimensions of the project's impact were evaluated: socio-environmental, scientific, and educational, applying qualitative and quantitative indicators. Preliminary results showed a 53.2% reduction in the number of cigarette butts collected during monitoring activities. Environmental knowledge and community involvement also increased, as 85.7% of the children shared information related to the project. Over two years, the initiative empowered children as agents of environmental conservation and prevented 6821 cigarette butts from reaching the ocean. This study highlights the potential of citizen science by integrating local knowledge, children's participation, empowerment, leadership, and collective action.
{"title":"Co-creating solutions through citizen science: Children reduce cigarette butt contamination on Ayangue beach (Ecuador)","authors":"Beatriz Almonacil Fernández , María Luján Bustos , Teresa Vera San Martín , Mario Palacios Moreno , Daniela Hill Piedra , Dolores Astudillo Brocel","doi":"10.1016/j.ocecoaman.2026.108132","DOIUrl":"10.1016/j.ocecoaman.2026.108132","url":null,"abstract":"<div><div>Cigarette butt contamination represents a significant and poorly known threat to coastal ecosystems. This study presents the experience of a citizen science project co-created in the commune of Ayangue (Ecuador), whose objective was to reduce and prevent cigarette butt contamination on the beach, promoting the active participation of children as agents of change. Through a participatory methodological approach, educational workshops, beach monitoring, environmental projects, and artistic activities were conducted. Three dimensions of the project's impact were evaluated: socio-environmental, scientific, and educational, applying qualitative and quantitative indicators. Preliminary results showed a 53.2% reduction in the number of cigarette butts collected during monitoring activities. Environmental knowledge and community involvement also increased, as 85.7% of the children shared information related to the project. Over two years, the initiative empowered children as agents of environmental conservation and prevented 6821 cigarette butts from reaching the ocean. This study highlights the potential of citizen science by integrating local knowledge, children's participation, empowerment, leadership, and collective action.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108132"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146175016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-12DOI: 10.1016/j.ocecoaman.2026.108128
Sreenivasulu Ganugapenta , Effi Helmy Ariffin , Wenjian Li , Siti Nur Hanani Zainuddin , Mohammad Ikhmal Siddiq Jefri Din , Masha Nur Salsabiela Menhat , Nurwani Mohd Zaki , Mardiha Mokhtar , Muhammad Rizal Razali , Khairul Nizam Abdul Maulud , Mohd Fuad Miskon
Coastal areas are increasingly threatened by the combined effects of climate change and human activities. This study investigates coastal vulnerability along the West Coast of Peninsular Malaysia (WCPM) by applying a comprehensive Coastal Vulnerability Index (CVI) that integrates multiple physical and socio-economic variables. A total of fourteen parameters were assessed, including nine physical parameters such as bathymetry, shoreline change, sea level rise, geomorphology, and mangrove cover, along with five socio-economic parameters such as infrastructure, population density, and land use. Principal Component Analysis and hierarchical cluster analysis were applied to identify the most influential factors and reveal spatial patterns of vulnerability. The results showed that districts in the northern region exhibit very high vulnerability due to the combination of sensitive environmental features and intense human pressures, particularly rapid infrastructure development. In contrast, southern districts tend to have lower vulnerability, supported by natural buffers and relatively less disturbance. A two-way hierarchical heatmap provided insights into regional groupings and co-occurring vulnerability drivers. The resulting risk map serves as a practical decision-making tool to support adaptive coastal planning. It can help stakeholders and policymakers prioritize areas for intervention, implement zoning regulations and adopt nature-based solutions to enhance resilience against future coastal hazards.
{"title":"Index based assessment of coastal vulnerability along the West Coast of Peninsular Malaysia: Evidence of climate change and anthropogenic impacts","authors":"Sreenivasulu Ganugapenta , Effi Helmy Ariffin , Wenjian Li , Siti Nur Hanani Zainuddin , Mohammad Ikhmal Siddiq Jefri Din , Masha Nur Salsabiela Menhat , Nurwani Mohd Zaki , Mardiha Mokhtar , Muhammad Rizal Razali , Khairul Nizam Abdul Maulud , Mohd Fuad Miskon","doi":"10.1016/j.ocecoaman.2026.108128","DOIUrl":"10.1016/j.ocecoaman.2026.108128","url":null,"abstract":"<div><div>Coastal areas are increasingly threatened by the combined effects of climate change and human activities. This study investigates coastal vulnerability along the West Coast of Peninsular Malaysia (WCPM) by applying a comprehensive Coastal Vulnerability Index (CVI) that integrates multiple physical and socio-economic variables. A total of fourteen parameters were assessed, including nine physical parameters such as bathymetry, shoreline change, sea level rise, geomorphology, and mangrove cover, along with five socio-economic parameters such as infrastructure, population density, and land use. Principal Component Analysis and hierarchical cluster analysis were applied to identify the most influential factors and reveal spatial patterns of vulnerability. The results showed that districts in the northern region exhibit very high vulnerability due to the combination of sensitive environmental features and intense human pressures, particularly rapid infrastructure development. In contrast, southern districts tend to have lower vulnerability, supported by natural buffers and relatively less disturbance. A two-way hierarchical heatmap provided insights into regional groupings and co-occurring vulnerability drivers. The resulting risk map serves as a practical decision-making tool to support adaptive coastal planning. It can help stakeholders and policymakers prioritize areas for intervention, implement zoning regulations and adopt nature-based solutions to enhance resilience against future coastal hazards.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108128"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-06DOI: 10.1016/j.ocecoaman.2026.108107
Rita Rodrigues , Patrícia Tiago , Bruno Pinto
Citizen science has the potential to increase the amount of data collected on various subjects, as well as enhancing the scientific literacy of the citizens involved. This study aimed to evaluate the contribution of citizen science to the study of marine biodiversity in the Professor Luiz Saldanha Marine Park, a marine protected area located in mainland Portugal. The methodology consisted of applying an online survey to divers of the study area, which included questions on their sociodemographic profile, diving characteristics, motivations and challenges for diving, and species observation recording habits. From the survey, 102 valid responses were obtained, indicating that the majority of respondents have some diving experience, a high level of education, and an interest in recording the species observed. The results suggest that divers have the potential to contribute valuable data to citizen science initiatives. However, actual participation in citizen science platforms remains limited. Overall, the findings indicate that citizen science can enhance knowledge of marine biodiversity in the study area, although greater optimization of data usage and increased citizen engagement are needed. These insights can inform the development of targeted strategies to increase diver participation in biodiversity monitoring, thereby improving the integration of citizen-contributed data into marine conservation efforts.
{"title":"Contribution of citizen science to marine biodiversity research: Divers’ participation in citizen science platforms in Portugal","authors":"Rita Rodrigues , Patrícia Tiago , Bruno Pinto","doi":"10.1016/j.ocecoaman.2026.108107","DOIUrl":"10.1016/j.ocecoaman.2026.108107","url":null,"abstract":"<div><div>Citizen science has the potential to increase the amount of data collected on various subjects, as well as enhancing the scientific literacy of the citizens involved. This study aimed to evaluate the contribution of citizen science to the study of marine biodiversity in the Professor Luiz Saldanha Marine Park, a marine protected area located in mainland Portugal. The methodology consisted of applying an online survey to divers of the study area, which included questions on their sociodemographic profile, diving characteristics, motivations and challenges for diving, and species observation recording habits. From the survey, 102 valid responses were obtained, indicating that the majority of respondents have some diving experience, a high level of education, and an interest in recording the species observed. The results suggest that divers have the potential to contribute valuable data to citizen science initiatives. However, actual participation in citizen science platforms remains limited. Overall, the findings indicate that citizen science can enhance knowledge of marine biodiversity in the study area, although greater optimization of data usage and increased citizen engagement are needed. These insights can inform the development of targeted strategies to increase diver participation in biodiversity monitoring, thereby improving the integration of citizen-contributed data into marine conservation efforts.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108107"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146175018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-07DOI: 10.1016/j.ocecoaman.2026.108114
Francesca De Serio
Coastal management increasingly relies on global observing systems, remote sensing, and model-based analytics, including artificial intelligence. Yet many management decisions, such as port operations, outfall control, early warning, site-specific planning, unfold over tens–hundreds of metres and hours–days. We show how ‘everywhere’ (broad-scale) and ‘anywhere’ (local-scale) strategies can be combined, and we propose a practical integration framework that links measured variables, resolution requirements, and decision pathways. Using a Mediterranean port as a demonstrator, we derive Eulerian eddy diffusivity from high-frequency and multi-year time series of measured velocity and find pronounced vertical and seasonal variability, of order 1–10 m2s-1, that alters compliance assessments and dispersion forecasts. A similar variability cannot be resolved by surface-only or low-frequency data. We discuss implications for decision-support systems, data interoperability, funding continuity, and the progressive implementation of digital twin solutions. Local observing does not compete with global assets. Rather, it calibrates, validates, and contextualizes them. Embedding minimal, sustainable local networks within open, interoperable platforms can yield more actionable, equitable, and resilient coastal governance.
{"title":"From ‘everywhere’ to ‘anywhere’: integrating local observing with global systems for coastal management","authors":"Francesca De Serio","doi":"10.1016/j.ocecoaman.2026.108114","DOIUrl":"10.1016/j.ocecoaman.2026.108114","url":null,"abstract":"<div><div>Coastal management increasingly relies on global observing systems, remote sensing, and model-based analytics, including artificial intelligence. Yet many management decisions, such as port operations, outfall control, early warning, site-specific planning, unfold over tens–hundreds of metres and hours–days. We show how ‘everywhere’ (broad-scale) and ‘anywhere’ (local-scale) strategies can be combined, and we propose a practical integration framework that links measured variables, resolution requirements, and decision pathways. Using a Mediterranean port as a demonstrator, we derive Eulerian eddy diffusivity from high-frequency and multi-year time series of measured velocity and find pronounced vertical and seasonal variability, of order 1–10 m<sup>2</sup>s<sup>-1</sup>, that alters compliance assessments and dispersion forecasts. A similar variability cannot be resolved by surface-only or low-frequency data. We discuss implications for decision-support systems, data interoperability, funding continuity, and the progressive implementation of digital twin solutions. Local observing does not compete with global assets. Rather, it calibrates, validates, and contextualizes them. Embedding minimal, sustainable local networks within open, interoperable platforms can yield more actionable, equitable, and resilient coastal governance.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108114"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146175017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-04DOI: 10.1016/j.ocecoaman.2026.108110
Katherine Cure , Martial Depczynski , Ben Radford , Azton Howard , Phillip McCarthy , Damon Pyke , Sharyn Hickey , Brendan Ford , Diego R. Barneche , Bardi Jawi and Oorany Rangers , Bardi Jawi Traditional Owners
Effective marine conservation planning that supports long-term food security for Indigenous peoples requires a clear understanding of how fish populations use coastal seascapes and interact with local fisheries. Mangroves provide sheltered, accessible fishing grounds that support abundant culturally and commercially important fish. Their ecological connectivity with adjacent reefs, shaped by local tidal regimes, determines how fish use these habitats for food and shelter. We investigated these dynamics in the Bardi Jawi Indigenous Protected Area in the Kimberley region of northwest Australia, an area exposed to extreme tidal ranges (∼12 m). Fish populations were sampled using baited video surveys at mangrove and reef habitats over five years. Satellite-derived habitat models quantified habitat metrics (e.g. area) at local scales. Data were combined to quantify fish population metrics and their relationship to habitat and other environmental variables. Species richness and total fish abundance were higher on reefs, particularly in areas with higher water clarity and greater structural complexity. However, for ten culturally important fisheries species, abundance and biomass were similar in mangrove and reefs and positively associated with the number of available habitat patches regardless of type. Notably, mangroves supported a higher proportion of larger individuals in four of the ten cultural fisheries targets. Bardi Jawi Traditional Ecological Knowledge has long recognised the importance of mangrove-reef connectivity for sustaining fisheries and has informed the design of local spatial protection boundaries that include both habitats. Conservation strategies that integrate knowledge systems to protect mangrove-reef mosaics are essential for sustaining fish populations across coastal seascapes.
{"title":"Habitat mosaics of mangroves and reefs support fisheries sustainability for Traditional Owners","authors":"Katherine Cure , Martial Depczynski , Ben Radford , Azton Howard , Phillip McCarthy , Damon Pyke , Sharyn Hickey , Brendan Ford , Diego R. Barneche , Bardi Jawi and Oorany Rangers , Bardi Jawi Traditional Owners","doi":"10.1016/j.ocecoaman.2026.108110","DOIUrl":"10.1016/j.ocecoaman.2026.108110","url":null,"abstract":"<div><div>Effective marine conservation planning that supports long-term food security for Indigenous peoples requires a clear understanding of how fish populations use coastal seascapes and interact with local fisheries. Mangroves provide sheltered, accessible fishing grounds that support abundant culturally and commercially important fish. Their ecological connectivity with adjacent reefs, shaped by local tidal regimes, determines how fish use these habitats for food and shelter. We investigated these dynamics in the Bardi Jawi Indigenous Protected Area in the Kimberley region of northwest Australia, an area exposed to extreme tidal ranges (∼12 m). Fish populations were sampled using baited video surveys at mangrove and reef habitats over five years. Satellite-derived habitat models quantified habitat metrics (e.g. area) at local scales. Data were combined to quantify fish population metrics and their relationship to habitat and other environmental variables. Species richness and total fish abundance were higher on reefs, particularly in areas with higher water clarity and greater structural complexity. However, for ten culturally important fisheries species, abundance and biomass were similar in mangrove and reefs and positively associated with the number of available habitat patches regardless of type. Notably, mangroves supported a higher proportion of larger individuals in four of the ten cultural fisheries targets. Bardi Jawi Traditional Ecological Knowledge has long recognised the importance of mangrove-reef connectivity for sustaining fisheries and has informed the design of local spatial protection boundaries that include both habitats. Conservation strategies that integrate knowledge systems to protect mangrove-reef mosaics are essential for sustaining fish populations across coastal seascapes.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108110"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-10DOI: 10.1016/j.ocecoaman.2026.108130
Jiaqi Ning , Yang Chen , Zhiliang Liu , Huiyin Song , Tengfei Xing , Hailong Huang , Du Su , Yibo Wang , Hao Yang , Yue Ma
Over the past two decades, harmful algal blooms (HABs) have frequently occurred in the coastal waters off Qinhuangdao (CWQ) in the Bohai Sea, with paralytic shellfish toxins (PSTs) in shellfish often exceeding safety standards. However, research on the biodiversity and seasonal variations of toxic HAB species in this area remains scarce, significantly hindering studies on the prevention and control of toxic HAB disasters. Since 2014, we have systematically identified and studied toxic microalgae in the CWQ. However, the historical survey voyages were primarily conducted during the summer, lacking continuous monitoring and research throughout the entire year. From March 2022 to February 2023, monthly samples were collected from the CWQ to investigate the biodiversity, spatiotemporal distributions, and environmental drivers of HAB species, utilizing metabarcoding methods. A total of 3711 amplicon sequence variants (ASVs) across nine phytoplankton phyla were identified in this research, with Dinoflagellata and Chlorophyta being the dominant phyla. Among the 251 annotated phytoplankton species, 51 were identified as potentially HAB species, including 18 capable of producing toxins or potentially toxic substances. Notably, the HAB species Teleaulax acuta was found to be distributed throughout the region year-round, exhibiting a relatively high abundance. Additionally, several toxic species from the genus Alexandrium (PSTs), Pseudo-nitzschia (domoic acid, DA), and Karenia (Brevetoxin, BTX), were widely detected in the CWQ from August to December 2022. Temperature and salinity were identified as critical environmental drivers influencing the distribution and seasonal succession of dominant HAB species. In summary, at least 129 potentially HAB species were identified in the CWQ from 2014 to 2023, including 43 toxigenic species or those with potentially toxic effects, posing a high risk of toxic HAB outbreaks. This research underscores the importance of monitoring toxic HAB species for the prevention and control of HAB events in coastal sea areas.
{"title":"High risk of harmful algal bloom events due to rich biodiversity of harmful microalgae: Insights from a ten-year-long field investigation in the coastal waters off Qinhuangdao, China","authors":"Jiaqi Ning , Yang Chen , Zhiliang Liu , Huiyin Song , Tengfei Xing , Hailong Huang , Du Su , Yibo Wang , Hao Yang , Yue Ma","doi":"10.1016/j.ocecoaman.2026.108130","DOIUrl":"10.1016/j.ocecoaman.2026.108130","url":null,"abstract":"<div><div>Over the past two decades, harmful algal blooms (HABs) have frequently occurred in the coastal waters off Qinhuangdao (CWQ) in the Bohai Sea, with paralytic shellfish toxins (PSTs) in shellfish often exceeding safety standards. However, research on the biodiversity and seasonal variations of toxic HAB species in this area remains scarce, significantly hindering studies on the prevention and control of toxic HAB disasters. Since 2014, we have systematically identified and studied toxic microalgae in the CWQ. However, the historical survey voyages were primarily conducted during the summer, lacking continuous monitoring and research throughout the entire year. From March 2022 to February 2023, monthly samples were collected from the CWQ to investigate the biodiversity, spatiotemporal distributions, and environmental drivers of HAB species, utilizing metabarcoding methods. A total of 3711 amplicon sequence variants (ASVs) across nine phytoplankton phyla were identified in this research, with Dinoflagellata and Chlorophyta being the dominant phyla. Among the 251 annotated phytoplankton species, 51 were identified as potentially HAB species, including 18 capable of producing toxins or potentially toxic substances. Notably, the HAB species <em>Teleaulax acuta</em> was found to be distributed throughout the region year-round, exhibiting a relatively high abundance. Additionally, several toxic species from the genus <em>Alexandrium</em> (PSTs), <em>Pseudo-nitzschia</em> (domoic acid, DA), and <em>Karenia</em> (Brevetoxin, BTX), were widely detected in the CWQ from August to December 2022. Temperature and salinity were identified as critical environmental drivers influencing the distribution and seasonal succession of dominant HAB species. In summary, at least 129 potentially HAB species were identified in the CWQ from 2014 to 2023, including 43 toxigenic species or those with potentially toxic effects, posing a high risk of toxic HAB outbreaks. This research underscores the importance of monitoring toxic HAB species for the prevention and control of HAB events in coastal sea areas.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108130"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-09DOI: 10.1016/j.ocecoaman.2026.108129
Richard J.C. Marijnissen , Yuting Tai , Sara P. Cobacho , Martin J. Baptist , Dirk S. van Maren , Pushpa Dissanayake , Dennis Oberrecht , Dirk Post , Matthijs Buurman , Jantsje M. van Loon-Steensma , Wei Chen , Joanna Staneva , Mindert B. de Vries
The Ems Estuary faces existential challenges including flood risk, increasing turbidity, and biodiversity loss, all of which may intensify under future climate scenarios and require transboundary collaboration between the Netherlands and Germany. Addressing these challenges requires compliance with EU, national, and local regulations. Simultaneously each nation pursues socioeconomic benefits from the restoration through a holistic, system-based approach. This study synthesizes the key processes driving flood risk, hyper-turbidity, and salinization within the Ems Estuary. From this understanding the paper catalogues the planned and implemented pilot measures from both countries to advance their climate adaptation plans. Both nations share a common vision of leveraging the high turbidity of the estuary as an asset in climate adaption, e.g. for land raising, dyke reinforcement or habitat creation. Building on the pilot projects and shared visions, three transboundary upscaling strategies involving sediment management are proposed: (A) land elevation using dredged sediment; (B) multifunctional flood defences incorporating nature-based solutions; and (C) habitat creation and restoration to enhance ecological resilience. The Ems Estuary offers valuable insights for global transboundary estuarine management, illustrating how innovative sediment management and transboundary cooperation can be achieved to support climate adaptation and sustainable development. The study underscores the need for harmonized governance, standardized success metrics, and cross-border planning to enable effective upscaling.
{"title":"From pilots to policy: upscaling sediment management strategies for climate resilience in a transboundary estuary","authors":"Richard J.C. Marijnissen , Yuting Tai , Sara P. Cobacho , Martin J. Baptist , Dirk S. van Maren , Pushpa Dissanayake , Dennis Oberrecht , Dirk Post , Matthijs Buurman , Jantsje M. van Loon-Steensma , Wei Chen , Joanna Staneva , Mindert B. de Vries","doi":"10.1016/j.ocecoaman.2026.108129","DOIUrl":"10.1016/j.ocecoaman.2026.108129","url":null,"abstract":"<div><div>The Ems Estuary faces existential challenges including flood risk, increasing turbidity, and biodiversity loss, all of which may intensify under future climate scenarios and require transboundary collaboration between the Netherlands and Germany. Addressing these challenges requires compliance with EU, national, and local regulations. Simultaneously each nation pursues socioeconomic benefits from the restoration through a holistic, system-based approach. This study synthesizes the key processes driving flood risk, hyper-turbidity, and salinization within the Ems Estuary. From this understanding the paper catalogues the planned and implemented pilot measures from both countries to advance their climate adaptation plans. Both nations share a common vision of leveraging the high turbidity of the estuary as an asset in climate adaption, e.g. for land raising, dyke reinforcement or habitat creation. Building on the pilot projects and shared visions, three transboundary upscaling strategies involving sediment management are proposed: (A) land elevation using dredged sediment; (B) multifunctional flood defences incorporating nature-based solutions; and (C) habitat creation and restoration to enhance ecological resilience. The Ems Estuary offers valuable insights for global transboundary estuarine management, illustrating how innovative sediment management and transboundary cooperation can be achieved to support climate adaptation and sustainable development. The study underscores the need for harmonized governance, standardized success metrics, and cross-border planning to enable effective upscaling.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108129"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2026-05-01Epub Date: 2026-02-13DOI: 10.1016/j.ocecoaman.2026.108133
Zenghui Li , Peng Wang , Futian Ren , Zhao Guo , Shuxian Liu , Lei Huang
Emergency water supply (EWS) refers to water reserved from alternative sources for residential use during water emergencies such as pollution events or infrastructure failures. In estuarine regions, which frequently experience natural disasters and are prone to sudden events that release hazardous chemicals into river systems, emergency water supply risk (EWSR) is a critical issue to urban water security due to the interplay of tidal dynamics and river flows. Although river–tide hydrodynamics have been widely studied, important gaps remain in understanding pollutant transport processes and their implications for EWSR. In this study, we developed a high-resolution two-dimensional hydrodynamic and pollutant transport model for the Yangtze River Estuary, demonstrating that river-tide interactions substantially influence pollutant transport. The results indicate that transport speeds during high-flow periods are roughly twice those observed during low-flow periods. Meanwhile, tidal backflows intensify pollutant retention in downstream areas, prolonging residence times and increasing associated risks. Furthermore, we propose a novel framework for assessing EWSR in estuarine regions, which integrates three risk levels and five sequential criteria. Case assessment results suggest that high-risk areas include Changzhou, Wuxi, and Jingjiang, where pollutants can reach water intakes in less than 4 h, challenging timely closure. Nantong and Zhangjiagang are also identified as high-risk regions, with both EWS and emergency water storage (EWSt) deficits in Nantong, and EWS deficits in Zhangjiagang. This framework provides a practical tool for proactive risk assessment and emergency planning, supporting improved water security in estuarine regions exposed to complex hydrodynamic conditions and pollution threats.
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Pub Date : 2026-05-01Epub Date: 2026-02-06DOI: 10.1016/j.ocecoaman.2026.108125
Sazeed Mehrab Souhardya , Afrin Mirza Helen , Jannatul Ferdous Shawlin , Md Shahidul Islam Kazal , Ilias Ebne Kabir , Md Bokthier Rahman , Aysha Rahi Noor , Monayem Hussain , Syed Mohammad Aminur Rahman
The study examines shallow-water seine fishing dynamics, productivity, and sustainability in the coastal water of Bangladesh following a 65-day fishing ban. The ban boosted fisheries yields but also intensified fishing pressure through the increased use of destructive methods such as beach seining, known locally as ‘Tana Jal.’ We used a mixed-methods approach to collect data from 150 fishers in 2024 via semi-structured questionnaires and focus group discussions. We then applied linear mixed-effects models and generalized additive models to identify key predictors of catch per unit effort (CPUE) and determine optimal fishing effort. Key factors influencing daily catch rates included the number of boats, gear type, price per kilogram of catch, and haul duration. Our findings revealed that the optimal fishing effort to maximize catch per unit effort (CPUE) is around 25 fishers and 4–5 boats per site. However, observed fishing effort often far exceeds these levels, especially in high-access areas, indicating that current practices breach model-derived sustainability thresholds. Despite initial productivity gains, fishers increasingly encountered lower-value species and smaller-sized individuals, signaling long-term declines in stock health and shifts in trophic dynamics. These findings highlight the urgent need for improved and adaptive co-management approaches, stricter gear restrictions, and consideration of socioeconomic realities. Community participation and regionally specific strategies, including regular adjustments to seasonal closures, may help reconcile livelihood needs with ecological integrity. We argue that sustaining small-scale fisheries such as beach seining while preserving Bangladesh's coastal economies and food security requires effective management and collaborative governance.
{"title":"Sustaining the benefits of the 65-day marine fishing ban: A case study of nearshore beach seine fisheries in coastal Bangladesh","authors":"Sazeed Mehrab Souhardya , Afrin Mirza Helen , Jannatul Ferdous Shawlin , Md Shahidul Islam Kazal , Ilias Ebne Kabir , Md Bokthier Rahman , Aysha Rahi Noor , Monayem Hussain , Syed Mohammad Aminur Rahman","doi":"10.1016/j.ocecoaman.2026.108125","DOIUrl":"10.1016/j.ocecoaman.2026.108125","url":null,"abstract":"<div><div>The study examines shallow-water seine fishing dynamics, productivity, and sustainability in the coastal water of Bangladesh following a 65-day fishing ban. The ban boosted fisheries yields but also intensified fishing pressure through the increased use of destructive methods such as beach seining, known locally as ‘Tana Jal.’ We used a mixed-methods approach to collect data from 150 fishers in 2024 via semi-structured questionnaires and focus group discussions. We then applied linear mixed-effects models and generalized additive models to identify key predictors of catch per unit effort (CPUE) and determine optimal fishing effort. Key factors influencing daily catch rates included the number of boats, gear type, price per kilogram of catch, and haul duration. Our findings revealed that the optimal fishing effort to maximize catch per unit effort (CPUE) is around 25 fishers and 4–5 boats per site. However, observed fishing effort often far exceeds these levels, especially in high-access areas, indicating that current practices breach model-derived sustainability thresholds. Despite initial productivity gains, fishers increasingly encountered lower-value species and smaller-sized individuals, signaling long-term declines in stock health and shifts in trophic dynamics. These findings highlight the urgent need for improved and adaptive co-management approaches, stricter gear restrictions, and consideration of socioeconomic realities. Community participation and regionally specific strategies, including regular adjustments to seasonal closures, may help reconcile livelihood needs with ecological integrity. We argue that sustaining small-scale fisheries such as beach seining while preserving Bangladesh's coastal economies and food security requires effective management and collaborative governance.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"276 ","pages":"Article 108125"},"PeriodicalIF":5.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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