Ocean & Coastal Management最新文献

{"title":"Construction of island ecological security pattern under multi-circle development pattern: Evidence from Hainan Island","authors":"Sizheng Li ,&nbsp;Feng Gui ,&nbsp;Hongyu Li ,&nbsp;Yanwei Song ,&nbsp;Linhao Peng ,&nbsp;Lin Zhou ,&nbsp;Yang Wang","doi":"10.1016/j.ocecoaman.2025.107809","DOIUrl":"10.1016/j.ocecoaman.2025.107809","url":null,"abstract":"<div><div>Global climate change and rapid urbanization have led to dramatic changes in the ecological quality and ecosystems of the islands, seriously affecting their biodiversity and ecological security. Hainan Island is a typical tropical island in China with rich and diverse species. Currently, Hainan Island is vigorously constructing a free trade port, and large-scale development and construction will certainly cause disturbance to the island ecosystem. In this study, the objective is to employ the RSEI index to expeditiously evaluate the quality of the ecological environment. The study will utilize multi-circle analysis to assess the ecological quality of the island. Additionally, it will rely on the circuit theory to identify the ecological elements of Hainan Island. The study will construct the ecological security pattern of Hainan Island and propose an optimization strategy. The results show that: (1) the area with excellent ecological grade in each circle decreases by circle, accounting for 40.02 % of Hainan Island; the area proportion of each ecological class at Circle VI approximates the whole island distribution proportion; (2) the source patches on the north side of the center of Hainan Island are severely fragmented, while the patches on the south side are close together. The total length of the 25 ecological corridors is 711.58 km, which is concentrated on the north and west sides of Hainan Island, and the number of L-EC, M-EC and H-EC are 3, 14 and 8 respectively. (3) with reference to the distribution of ecological elements, we have constructed the ecological security strategic pattern of Hainan Island as “one ring + two cores + three screens + four axes + N points”. In addition, based on relevant existing policies and regulations in Hainan Island and international case studies, methods for zoning control and optimization are proposed for each ecological element, with the aim of strengthening the island's resilience. In the process of island ecological protection and restoration, the results of this study can be used as a reference to develop island governance strategies and specific measures to promote ecological security and sustainable development on Hainan Island.<em>Keywords</em>: Hainan Island; RSEI; MCR; Linkage mapper; ecological security pattern.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107809"},"PeriodicalIF":4.8,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491470","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}

{"title":"Ballast water management of nuclear wastewater: Tripartite policy analysis","authors":"Xin Mao ,&nbsp;Yusheng Zhou ,&nbsp;Kum Fai Yuen","doi":"10.1016/j.ocecoaman.2025.107825","DOIUrl":"10.1016/j.ocecoaman.2025.107825","url":null,"abstract":"<div><div>The ocean discharge of treated Fukushima wastewater presents complex governance challenges for radionuclide-contaminated ballast water. This study proposes a tripartite evaluation and optimisation framework targeting flag states, port states, and shipping lines. Stakeholder performance is assessed via PCA-based inspection data, entropy-weighted Cesium-137 diffusion modelling, and ESG-oriented text mining. After Min-Max normalisation, multivariable regression identifies interdependencies, followed by a Nash equilibrium model to simulate strategic responses. To assess robustness, internal sensitivity tests are conducted under policy-driven and market-driven perturbations, while external risks are reviewed to inform scenario extensibility. Results reveal behavioural asymmetries and non-linear interactions: unilateral actions produce trade-offs, but coordinated strategies yield synergistic gains. These findings highlight the importance of a neutral coordinating body to align regulatory sequencing and balance stakeholder responses, supporting stable and adaptive ballast water governance under nuclear risk conditions.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107825"},"PeriodicalIF":4.8,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480449","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}

{"title":"Multi-decadal dynamics of the Changjiang estuarine tidal flat resource: Causes and threats","authors":"Gang Liu ,&nbsp;Yaying Lou ,&nbsp;Jie Wang ,&nbsp;Yulu Yang ,&nbsp;Mingsi Li ,&nbsp;Wen Wei","doi":"10.1016/j.ocecoaman.2025.107831","DOIUrl":"10.1016/j.ocecoaman.2025.107831","url":null,"abstract":"<div><div>Long-term changes in tidal flat resources under global change have garnered worldwide attention. Previous studies concentrated on either area variations or geomorphic changes of tidal flats, but have rarely bridged these approaches. In this study, we examined the multi-decadal dynamics of the Changjiang estuarine tidal flats (including the Hengsha Shoal, Jiuduan Shoal, and Nanhui Shoal) and potential land resource risks using coupled topographic data, remote sensing images, and hydrological data. The three tidal flats experienced increases in gross area above 0 m (52–94 km²) and above −5 m (4–188 km²) between 1958 and 2019. However, after 2000, accretion rates declined, with deposition concentrated in landward regions, while erosion began to affect the seaward edges. Meanwhile, the land resource of the Hengsha Shoal and Nanhui Shoal decreased by 47 and 72 km², respectively, because of intensive reclamation after 2002, whereas that of the Jiuduan Shoal increased by 60 km² as no reclamation occurred. Dam-induced riverine sediment decrease contributes to potential tidal flat erosion, which is partly counteracted by the engineering-promoted siltation through artificial structure construction and marsh vegetation planting. Relative to accretion/retreat, recent large-scale reclamation has played an important role in tidal flat resource dynamics. Continuous small riverine sediment supply, increased sea level rise, and steepening slope contribute to increased land resource risks of the tidal flats. In response, measures including integrated river-estuary management, scientific siltation promotion, and suitable reclamation design should be implemented. These findings provide insights for sustainable utilization of tidal flat resources in other mega estuaries globally.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107831"},"PeriodicalIF":4.8,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480372","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}

{"title":"From boom to decline: Spatio-temporal evolution and management of New Caledonia's sea cucumber fisheries","authors":"Steven W. Purcell ,&nbsp;Caroline Ton ,&nbsp;Nicolas Guillemot ,&nbsp;Antoine Gilbert","doi":"10.1016/j.ocecoaman.2025.107829","DOIUrl":"10.1016/j.ocecoaman.2025.107829","url":null,"abstract":"<div><div>Sea cucumber fisheries worldwide have evolved considerably in response to market demands and effects of exploitation. Reports of overfishing abound yet studies have rarely examined the processes within the fishery systems and the efficacy of various management measures. New Caledonia is one of few Pacific Island territories/countries to have continued producing wild sea cucumbers without moratoria. We examined the changes in fishery production, fleet capacity and target species between the Northern and Southern Provinces’ sea cucumber fisheries over the past decades and the applied management measures. Capture production declined more than 70 % since the 1980s. Fishers sometimes harvested other resources on fishing trips, but often focussed on sea cucumbers, entailing 20 species. Landings and catch composition differed vastly between the two provinces and medium-value species were significantly targeted in recent years. Fleet capacity quadrupled over a few years, increasing pressure on the resource already declining in production. Underreporting by fishers of teatfish (<em>Microthele</em>) species following their listing on CITES Appendix II highlights difficulties in using quotas as a management tool. Minimum legal-size limits and a ban on compressed-air diving did not prevent decline but might have mitigated collapse of the fishery. Our study finds hyperstability through shifts in target species over time and resilience of some species to fishing pressure. We reveal that management imperatives might differ between fisheries within a country, requiring region-specific solutions. Constraining fleet capacity and numbers of fishers are ongoing challenges for sustaining small-scale, artisanal sea cucumber fisheries.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107829"},"PeriodicalIF":4.8,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481141","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}

{"title":"Urban Marine Protected Areas (MPAs): A systematic review of governance, management and human impact","authors":"Julie Marty-Gastaldi ,&nbsp;Nathalie Lazaric ,&nbsp;Benoit Dérijard","doi":"10.1016/j.ocecoaman.2025.107811","DOIUrl":"10.1016/j.ocecoaman.2025.107811","url":null,"abstract":"<div><div>The hundred largest Marine Protected Areas (MPAs) are located in remote offshore areas even though human populations are increasingly concentrated in urban coastal regions. Safeguarding coastal marine ecosystems in urban settings, where human populations are densely concentrated, presents challenges due to the need to balance the spatial demands of human activities with the preservation of the natural environment. This article focuses on MPAs located in urban contexts. We conducted a systematic literature review to (1) identify research focused on “urban” MPAs, (2) assess methodologies used to evaluate urban MPA governance and management, and (3) discuss the implications of integrating urban dynamics, management practices, and ecological considerations. Our findings reveal that 1) a clear definition of what constitutes an \"urban\" MPA remains elusive, while human disturbances are frequently acknowledged. This review therefore includes articles that address the human impact on the coastal environment, but also studies that do not explicitly address MPAs within an urban context. 2) Most studies emphasise the positive effects of management measures or the negative impact of human activities on marine ecosystems. 3) Our review underscores the diversity of approaches employed to evaluate MPA management and governance, highlighting that the concept of effectiveness can encompass social, cultural, and environmental dimensions. We suggest that future studies pay greater attention to the context and scale of MPA governance and management, to identify specific needs for improving MPA effectiveness in urban contexts.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107811"},"PeriodicalIF":4.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472411","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}

{"title":"Robust yard space allocation based on adversarial reinforcement learning considering vessel arrival time uncertainty","authors":"Wensi Wang ,&nbsp;Chunbin Zhang ,&nbsp;Zhikun Song","doi":"10.1016/j.ocecoaman.2025.107820","DOIUrl":"10.1016/j.ocecoaman.2025.107820","url":null,"abstract":"<div><div>In an era marked by volatile global trade patterns and increasing climate-related disruptions, operational resilience has become a critical determinant of port competitiveness. While optimized container stacking and retrieval strategies are recognized as vital levers for enhancing port resilience, their effectiveness is severely compromised by pervasive uncertainties in vessel arrival times (VAT) - a challenge amplified by complex transshipment networks and cascading delay effects. This study addresses the robust container stacking and retrieving (R-CSR) problem under VAT uncertainty through an integrated optimization and learning framework. A min-max robust optimization model is developed that simultaneously optimizes storage allocation and retrieval sequencing to minimize worst-case container travel distances across all plausible VAT scenarios. Recognizing the computational complexity of solving this problem in dynamic environments, we propose a novel robust adversarial reinforcement learning (R-ARL) algorithm which features a protagonist-adversary architecture. Numerical experiments demonstrate that the R-CSR model and algorithm are effective for test cases of different scales.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107820"},"PeriodicalIF":4.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338881","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}

{"title":"Optimistic climate mitigation scenario halves projected range loss in a neotropical dolphin","authors":"Rodrigo Tardin ,&nbsp;Guilherme Maricato ,&nbsp;Jeremy J. Kiszka ,&nbsp;Mauricio Cantor ,&nbsp;Israel Maciel ,&nbsp;Gabriel Melo-Santos ,&nbsp;Laura May-Collado ,&nbsp;Ana Carolina Meirelles ,&nbsp;Maria Isabel C. Gonçalves ,&nbsp;Fábio G. Daura-Jorge ,&nbsp;Renata S. Sousa-Lima ,&nbsp;Yvonnick Le Pendu ,&nbsp;Benoit de Thoisy ,&nbsp;Marta J. Cremer ,&nbsp;Paulo César Simões-Lopes ,&nbsp;Susana Caballero ,&nbsp;Marcos R. Rossi-Santos ,&nbsp;Maria Alice S. Alves ,&nbsp;Diana C. Freitas ,&nbsp;Marcos Cesar de Oliveira Santos ,&nbsp;Mariana M. Vale","doi":"10.1016/j.ocecoaman.2025.107800","DOIUrl":"10.1016/j.ocecoaman.2025.107800","url":null,"abstract":"<div><div>Ocean warming, acidification, and deoxygenation are expected to intensify without significant climate mitigation. In the tropics, rising ocean temperatures may push marine species to their thermal limits, leading to redistributions and cascading effects on communities and ecosystems. We evaluate how future climate change scenarios could impact the habitat suitability of an endemic species of the western tropical Atlantic Ocean, the Guiana dolphin, <em>Sotalia guianensis</em>. Using data from systematic surveys conducted between 1987 and 2023 complemented by open-source databases, we built the most comprehensive occurrence dataset for the species and developed ensemble Species Distribution Models to predict future distributions under the latest CMIP6 projected scenarios—‘optimistic’ (SSP1-2.6), ‘intermediate’ (SSP2-4.5), ‘pessimistic’ (SSP5-8.5)—using expert knowledge to validate model predictions in the present. Our models project substantial range contractions under all climate scenarios. By 2070, under the pessimistic scenario, suitable habitat is expected to decline by 46.9 %, nearly doubling the habitat loss projected under the optimistic scenario (23 %). Guiana dolphins are expected to lose habitat in northeastern Brazil and along the Caribbean coast (except Costa Rica). Remaining suitable areas are expected to become fragmented and confined to southeastern and southern Brazil, where the coastal zone is the most urbanized and degraded. Currently, only 21.6 % of the predicted Guiana dolphin range overlaps with Marine Protected Areas (MPAs), and just 1.8 % is covered by MPAs that prohibit extractive activities—a small proportion expected to decline from 19 % to 14 % in the future. Our study highlights the urgent need to incorporate climate change into conservation strategies for coastal tropical marine predators.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107800"},"PeriodicalIF":4.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338880","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}

{"title":"Transitioning to sustainable shipping: A multidimensional analysis of maritime emission strategies","authors":"Bugra Arda Zincir","doi":"10.1016/j.ocecoaman.2025.107823","DOIUrl":"10.1016/j.ocecoaman.2025.107823","url":null,"abstract":"<div><div>The maritime industry, responsible for a significant portion of global greenhouse gas emissions, faces mounting pressure to decarbonize while maintaining operational efficiency. This study examines emission mitigation strategies within the sector through the lens of a PESTEL framework, analyzing political, economic, social, technological, environmental, and legal dimensions. Key findings highlight the pivotal role of international regulations, such as MARPOL Annex VI and the EU maritime regulations, alongside national incentives in accelerating the adoption of alternative fuels and advanced emission reduction technologies. Economically, while measures like slow steaming offer immediate cost savings, technologies such as carbon capture and storage and hydrogen propulsion require substantial investment and infrastructure development. Social acceptance, workforce training, and public perception of alternative fuels emerge as critical factors in enabling industry-wide adoption. The study further explores technological challenges related to scalability and lifecycle emissions, emphasizing the need for coordinated innovation and investment. Environmental impacts, particularly on biodiversity and well-to-wake emissions, underscore the importance of regulatory oversight and sustainable fuel production. Legally, the industry faces complex compliance requirements, liability risks, and evolving insurance frameworks. By adopting a strategic and collaborative approach, the maritime sector can navigate these multifaceted challenges to achieve its decarbonization goals. This comprehensive analysis provides stakeholders with actionable insights to balance economic viability, regulatory compliance, and environmental sustainability in transitioning to a greener future.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107823"},"PeriodicalIF":4.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144366101","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}

{"title":"Strategic dynamics in the fishing Field: An egocentric network analysis of small-scale fishing communities in Chile","authors":"Miroslav Pulgar ,&nbsp;Daniela Refsou ,&nbsp;Constantino Villarroel","doi":"10.1016/j.ocecoaman.2025.107816","DOIUrl":"10.1016/j.ocecoaman.2025.107816","url":null,"abstract":"<div><div>Artisanal/small-scale fishers employ diverse strategies to navigate the fishing field, balancing access to resources with their institutional relationships. Within the framework of field theory, this study applies an egocentric network analysis to examine these strategies in fishing communities in central and south-central Chile. In doing so, we explore how the fishers mobilize different forms of capital and adjust their strategies within a field structured by power relations, competition, and disputes over resource access and the legitimacy of regulations. The results reveal that the fishers maintain stronger ties with associations and market actors, while their connections with control and financing agencies are comparatively weaker. Heterogeneity in the networks varies, reflecting a tension between diversity in institutions and efficiency in mobilizing resources. A cluster analysis identified three field action strategies, understood as the ways in which the fishers either stabilize their position or reconfigure their location within the fishing field: (1) leveraging fishers associations to strengthen social and cultural capital, (2) diversifying connections with governance and market actors to access symbolic and economic capital, and (3) engaging with research and financing organizations to secure technological and informational capital. These findings underscore the key role of network structure, relational proximity, and strategic variety in the fishing field, providing significant insights on the governance problem of artisanal fishing.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107816"},"PeriodicalIF":4.8,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331150","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}

{"title":"Liability division for ship collision accidents based on ontology model and bayesian network","authors":"Yaqing Shu ,&nbsp;Ao Dong ,&nbsp;Beiyan Ye ,&nbsp;Chengyong Liu ,&nbsp;Langxiong Gan ,&nbsp;Lan Song","doi":"10.1016/j.ocecoaman.2025.107824","DOIUrl":"10.1016/j.ocecoaman.2025.107824","url":null,"abstract":"<div><div>With the increase in maritime transport, ship collision accidents have occurred frequently and caused serious impacts on maritime traffic safety and the environment. In this research, a new method combining the ontology model and Bayesian network is proposed to address liability division for ship collision accidents. Firstly, 241 maritime traffic accident reports were collected from the China Maritime Safety Administration (CHINA MSA) between 2018 and 2021. Then, the improved Apriori algorithm is proposed to extract strong association rules and to construct the ship collision negligence ontology based on accident reports. After that, the liability division model is obtained by the ontology mapping Bayesian network and the maximum likelihood estimation method is used for parameter learning for this model. Finally, the proposed method is verified using sample data from the accident reports. The results showed a good capability of liability division for ship collision accidents of the proposed model. This method could serve as a powerful tool for liability division for ship collision accidents in maritime traffic.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"269 ","pages":"Article 107824"},"PeriodicalIF":4.8,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331148","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}