Ocean & Coastal Management最新文献

{"title":"Spatial-temporal characteristics of ship carbon emission based on AIS data","authors":"Zhengchun Sun ,&nbsp;Sudong Xu ,&nbsp;Jun Jiang","doi":"10.1016/j.ocecoaman.2025.107629","DOIUrl":"10.1016/j.ocecoaman.2025.107629","url":null,"abstract":"<div><div>As the global shipping industry continues to expand, the environmental implications of ship carbon emissions are becoming increasingly apparent. Despite extensive analyses of carbon emissions from marine and coastal transportation vessels in existing research, studies on the precise measurement of carbon emissions from vessels in inland waterways and the spatiotemporal characteristics of carbon emission distribution remain limited. Addressing these emissions is essential, especially given the critical role that shipping plays in global trade. To accurately quantify emissions, the Ship Automatic Identification System (AIS) serves as a powerful tool, offering precise tracking of ships' routes, operational statuses, and activities in real time. This study leverages AIS data collected from the Suzhou segment of the Beijing-Hangzhou Grand Canal, spanning from 2018 to 2023, to perform a meticulous analysis of carbon emissions over this six-year period. By applying a bottom-up Systematic Transportation and Environmental Assessment Model (STEAM), this study provides a robust and detailed estimation of emissions, allowing for a comprehensive examination of the environmental impact. Based on the calculation of Moran's I index, the analysis delves into multiple dimensions of ship carbon emissions, embracing the lenses of ship types, operational statuses, region features, and spatial-temporal autocorrelation. The results indicate that over the six-year study period, the total carbon emissions from vessels are estimated to be approximately 146.86 metric tons, with cargo ships accounting for 64.1 % of the total emissions and vessels operating in cruise mode representing 67 %. Spatially, the findings reveal that areas with higher carbon emissions are predominantly concentrated near port regions serving as critical nodes within the shipping network. These spatial patterns observed point to the localized nature of these emissions, providing essential insights for regional policymakers and environmental regulators.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107629"},"PeriodicalIF":4.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679115","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":"Is sparse local ecological knowledge accurate enough for policy? A seagrass mapping case study from five Greek islands in the Eastern Aegean Sea","authors":"Konstantis Alexopoulos ,&nbsp;Tim J. Grandjean ,&nbsp;Anastasia Miliou ,&nbsp;Theodoros Tsimpidis ,&nbsp;Abigail McQuatters-Gollop","doi":"10.1016/j.ocecoaman.2025.107627","DOIUrl":"10.1016/j.ocecoaman.2025.107627","url":null,"abstract":"<div><div>The low cost, high applicability and community-based nature of Local Ecological Knowledge (LEK) data for mapping marine benthic habitats has become increasingly popular in recent years. Nonetheless, due to persisting technocratic distrust of LEK often stemming from the unquantifiable nature of bias, the embedding of empirical data at policy levels often lags. Currently, protocols rely on high participation from stakeholders, however, such quotas are often unfeasible, with common limiting factors being the low numbers of knowledgeable individuals in remote parts of the world, and the lack of community trust in the conservation mechanism. In this study, we test whether data from a limited number of interviews with selected artisanal fishers can provide accurate and policy-valuable information as an alternative to high-participation data collection. Our work focuses on the case of <em>Posidonia oceanica</em> seagrass beds around five Greek islands in the eastern Aegean Sea. In comparison with remotely sensed seagrass distribution maps, our results show that the quality of selected LEK data can be exceptionally high (on average 78% accuracy; maximum 92% accuracy), arguing the point that limited-participation LEK should not be discarded as invalid at policy levels. Furthermore, the way LEK is recorded, as well as the number of years of fishing experience of the participants, were found to significantly affect the quality of data being delivered. Lastly, we show that LEK outperformed the governmentally-issued seagrass map, thus providing further evidence of fishers’ LEK ability to deliver policy-relevant data regarding the distribution of their local marine habitats.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"267 ","pages":"Article 107627"},"PeriodicalIF":4.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Managing marine resources sustainably – But how do we know when marine management has been successful?","authors":"Michael Elliott ,&nbsp;Ángel Borja ,&nbsp;Roland Cormier","doi":"10.1016/j.ocecoaman.2025.107623","DOIUrl":"10.1016/j.ocecoaman.2025.107623","url":null,"abstract":"<div><div>Current marine environmental management is the ‘sustainable management of people and their marine activities’ to be achieved through ecosystem manipulation and activity control. Marine management <em>per se</em> needs to define who requires and can achieve a successfully managed environment, the tools and indicators for that management, the indications of success and the means of knowing that the environment has been successfully managed. Indicators of success require policies and plans, environmental targets and regulatory standards and guidelines, i.e. output controls such as those stipulated by legislation. It should aim for sustainable outcomes based on government policy, to satisfy public demands and using the advice and assessments by natural and social scientists. The inputs, outputs and outcomes should include scientific research and advice, reporting to the government and the public as well as compliance in programme performance evaluations. In this, there are three interested bodies: (i) those requiring a successfully managed environment such as the public; (ii) those responsible to carry-out and monitor the programmes and regulate humans and their activities as mandated by government such as administrators and regulators, and (iii) those implementing the management measures. Here, examples from Europe and North America but with relevance to all maritime states are used to emphasise that management success encompasses a well-defined planning cycle with a vision achieved <em>as the result of</em> objectives being met <em>leading to</em> actions carried out <em>leading to</em> outputs produced <em>leading to</em> outcomes achieved.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107623"},"PeriodicalIF":4.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"First assessment of mercury bioaccumulation in jumbo squid (Dosidicus gigas) off Peru: The impact of sized group, sex, and feeding ecology","authors":"Zhenfang Zhao ,&nbsp;Guanyu Hu ,&nbsp;Bilin Liu ,&nbsp;Long Chen ,&nbsp;Ziyue Chen ,&nbsp;Xinjun Chen","doi":"10.1016/j.ocecoaman.2025.107641","DOIUrl":"10.1016/j.ocecoaman.2025.107641","url":null,"abstract":"<div><div>Jumbo squid, <em>Dosidicus gigas</em>, play a crucial role in marine ecosystems and are an important commercial species in the East Pacific. This study investigated the bioaccumulation characteristics of total mercury (THg) in jumbo squid (<em>Dosidicus gigas</em>) from the eastern Pacific Ocean, analyzing the influence of factors such as mantle length, sex, and feeding ecology. We analyzed the muscle tissue of 108 squid samples (small, medium, and large-sized groups) collected from June to December 2020. THg concentrations increased with mantle length, but all values remained within Chinese national edible standards. Females in medium and large-sized groups had significantly higher THg concentrations than males. Stable isotope (δ¹³C and δ¹⁵N) and fatty acid analyses revealed the feeding habits and trophic levels of different groups and their correlation with THg levels. Principal component analysis (PCA) identified body weight, δ¹³C, Eicosapentaenoic Acid, and THg as significant contributors to the first principal component, while Arachidonic Acid contributed to the second. Correlations between THg, δ¹³C, δ¹⁵N, and the Docosahexaenoic Acid/Eicosatetraenoic Acid ratio varied among groups. These findings highlight the importance of pollutant bioaccumulation research in cephalopods, providing insights into the biogeochemical cycling of pollutants in marine ecosystems. This study not only provides data on mercury levels in the muscles of giant squid, which can help evaluate the health risks of human consumption, but also suggest that future research should focus on the integration of pollutant research with biogeochemical techniques.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107641"},"PeriodicalIF":4.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679116","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":"Resilience maintenance strategy for mixed vehicle traffic on port expressway based on lane management","authors":"Yao Sun ,&nbsp;Dongxuan Bai ,&nbsp;Guoxiao Han ,&nbsp;Rui Feng ,&nbsp;Jinghan Hao ,&nbsp;Baozhen Yao","doi":"10.1016/j.ocecoaman.2025.107645","DOIUrl":"10.1016/j.ocecoaman.2025.107645","url":null,"abstract":"<div><div>Ports serve as critical nodes in the global shipping network and vital gateways for goods circulation, requiring resilience to withstand external disruptions. Expressway connecting ports are key channels for freight transport, and their traffic conditions significantly influence port operational resilience. This study explores optimal lane management strategies for mixed traffic environments involving connected autonomous vehicle (CAV) and human-driven vehicle (HDV) on future port-connected expressway. By integrating connected autonomous truck (CAT) into the mixed traffic flow, this study proposes three lane management strategies tailored to different vehicle purposes. The intrinsic relationship between traffic flow and the penetration rate of CAV are investigated by simulation and numerical analysis. A traffic flow prediction model is constructed to evaluate traffic conditions in real time and determine optimal fleet management strategies based on a decision-making model. Experimental results demonstrate the high reliability of the proposed decision-making outcomes. Finally, sensitivity analysis examines the impacts of speed fluctuations and transition segment lengths on traffic flow under different strategies. It is found that more concentrated speed distributions lead to higher peak traffic flow, while longer transition segments minimize efficiency losses caused by strategy changes. These findings provide valuable insights for improving future traffic conditions around ports.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107645"},"PeriodicalIF":4.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679276","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":"Dissolved oxygen prediction in the Taiwan Strait with the attention-based multi-teacher knowledge distillation model","authors":"Lei Chen ,&nbsp;Ye Lin ,&nbsp;Minquan Guo ,&nbsp;Wenfang Lu ,&nbsp;Xueding Li ,&nbsp;Zhenchang Zhang","doi":"10.1016/j.ocecoaman.2025.107628","DOIUrl":"10.1016/j.ocecoaman.2025.107628","url":null,"abstract":"<div><div>This study investigates the prediction of dissolved oxygen (DO) in the Taiwan Strait, a crucial indicator for marine ecosystems. Accurate prediction of DO in coastal waters is critical for various coastal engineering activities. Despite the availability of numerous prediction methods, including numerical models, statistical models, and machine learning approaches, these often fall short when addressing complex dynamic marine areas like the Taiwan Strait. This challenge is partly due to the complexity of the environment and issues with data scarcity. The research focuses on seven buoy stations in the Taiwan Strait and proposes the Attention-based Multi-teacher Knowledge Distillation (AMKD) model, which integrates a multi-channel attention mechanism with a multi-teacher knowledge distillation algorithm, specifically enhancing the accuracy of DO prediction and adaptability to missing data. The model is capable of forecasting DO hourly for the next 24 h, effectively mitigating the randomness and instability associated with DO. Experimental comparisons with state-of-the-art prediction models demonstrate that our approach outperforms commonly used methods in terms of accuracy. Overall, the AMKD model presents a novel and effective solution for predicting DO in complex marine areas, with significant implications for future marine environmental monitoring and management.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107628"},"PeriodicalIF":4.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679275","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":"Decision framework for sustainability assessment of alternative fuels to achieve shipping decarbonization","authors":"Kazi Khaled Mahmud ,&nbsp;Wahidul Sheikh ,&nbsp;Mohammed Mojahid Hossain Chowdhury","doi":"10.1016/j.ocecoaman.2025.107637","DOIUrl":"10.1016/j.ocecoaman.2025.107637","url":null,"abstract":"<div><div>The transition of shipping industry towards full decarbonization is under way, driven by regulations, the IMO's decarbonization targets, pressure from cargo owners, financial incentives, and evolving societal expectations. However, the need for a comprehensive framework to evaluate fuel options impedes the maritime industry's transition to alternative fuels. Stakeholders are still searching the most suitable alternative fuels which will ensure both the regulatory compliance and economic benefits. Hence, the study aimed to determine the most promising alternative fuel for the shipping industry based on a robust set of alternative fuel selection criteria and establish a comprehensive decision-making framework within a global context using a mixed-methods approach. The study identified an integrated set of sustainability criteria for alternative fuels utilizing systematic literature review framework and adopted the Best Worst Method (BWM) for determining the relative weight of criteria. Finally, the TOPSIS method has been used to outrank the alternative fuels-methanol, hydrogen, biofuel, ammonia, and LNG. The study concludes that methanol exhibits the highest potential as a sustainable future clean fuel, followed by hydrogen, biofuels, ammonia, and LNG respectively. The findings of the study are generalized as a decision support system to assist the stakeholder while making robust and comprehensive decisions about the choice of sustainable fuels through a balanced and all-encompassing view.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107637"},"PeriodicalIF":4.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679273","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":"How blue carbon financing can sustain blue carbon ecosystems protection and restoration: A proposed conceptual framework for the blue carbon financing mechanism","authors":"Ping Li ,&nbsp;Dahai Liu","doi":"10.1016/j.ocecoaman.2025.107644","DOIUrl":"10.1016/j.ocecoaman.2025.107644","url":null,"abstract":"<div><div>Blue carbon ecosystems usually have high carbon capture and storage capacity and can play an important role in addressing global climate change. Accordingly, it has become a consensus of the international community to perform fundraising for blue carbon protection and restoration projects through blue carbon finance. However, there is limited knowledge about the mechanism, classification form and investment model of blue carbon finance, restricting the popularity of the corresponding emerging financing tool. In this article, we conducted a systematic literature review and i) systematically discussed the blue carbon international conventions and initiatives, ii) analyzed the current blue carbon trading mechanism and the status of blue carbon project development, and iii) developed a conceptual framework for the blue carbon financing mechanism. We found that the development of blue carbon projects is facing the problem of mismatch between supply and demand. Further. Although blue carbon finance has been practiced in many ways around the world, blue carbon financial innovation and practice are very limited. To address this gap, we developed a framework which builds on three components: blue carbon principles and guidance, blue carbon trading and financial market, and blue carbon projects. We argued that a wide range of blue carbon financial forms should be adopted to expand existing financing channels, propose to classify blue carbon financial products into blue carbon spot, blue carbon trading instruments, financing instruments, and supporting instruments, and provide a systematic overview and examples of the operation mechanisms and principles of different financial instruments. The conceptual framework proposed in this study provides a systematic and comprehensive financial solution for the development of blue carbon projects, offering both theoretical contributions and practical tools for the advancement of blue carbon finance. This research addresses critical gaps in the field and lays a solid foundation for future investment strategies and policy-making in blue carbon finance.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107644"},"PeriodicalIF":4.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679274","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":"Speculative design for climate adaptation: Imagining coastal management strategies in Singapore's future waterfronts through postcards from the future","authors":"Erich Wolff ,&nbsp;Gabriel Tenaya Kaprielian ,&nbsp;Perrine Hamel","doi":"10.1016/j.ocecoaman.2025.107622","DOIUrl":"10.1016/j.ocecoaman.2025.107622","url":null,"abstract":"<div><div>With rising sea levels, coastal cities are expected to adapt to flooding and changing shorelines in the coming decades. With a growing interest in participatory planning and coastal management, it is key to develop new platforms to involve communities, decision makers and scientists alike in debates about climate adaptation. This article discusses the untapped power of speculative design in allowing society to envision future scenarios of climate adaptation and coastal protection. We draw on the experiences of the project “Adapting Waterfronts: Postcards from the Future, Singapore 2122” to interrogate how speculative visions about the future of waterfronts can support resilience building. The project consists of an exhibition, a virtual reality tour and a subsequent workshop, which provided opportunities for collective discussions on climate change adaptation. Exploring multiple types of knowledge, such as historic archives and scientific projections about sea-level rise, the project constructs new narratives about the political, social and biophysical aspects of coastal management. We discuss how the approach contributes to important debates in coastal management, including how it can (i) bridge historic barriers between different disciplines that are involved in urban planning and coastal management, (ii) foster speculative thinking through the use of augmented reality and (iii) reshape the relationship between researchers and society. This exploration of speculative futures – and the visualization of their implications in the city – has the potential to reshape how we conceptualize, analyse, and design coastal landscapes. Building on these experiences, we highlight gaps and important questions for similar projects aiming to promote scientific communication and education on coastal management strategies. We propose future lines of investigation on how speculative projects can offer opportunities for diverse audiences to connect with the science of climate change and, in doing so, promote collective debates on the topics of climate adaptation and coastal management.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107622"},"PeriodicalIF":4.8,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Assessment of heavy metals in surface seawater of Al Hoceima Bay, Northern Morocco","authors":"Zakaryae Koubaa ,&nbsp;Bouchra Oujidi ,&nbsp;Mounia Tahri ,&nbsp;Mohammed Thaiki ,&nbsp;Rachida Houssa ,&nbsp;Houria Dakak ,&nbsp;Hinde Cherkaoui Dekkaki","doi":"10.1016/j.ocecoaman.2025.107624","DOIUrl":"10.1016/j.ocecoaman.2025.107624","url":null,"abstract":"<div><div>The present study provides the first comprehensive assessment of the distribution of heavy metals (Al, Fe, Mn, Co, Ba, Zn, Cr, Ni, As, Pb, Cd) in surface seawater of Al Hoceima Bay, Mediterranean Sea, Morocco, over an annual cycle. Water samples were collected in autumn 2022, winter, spring, and summer 2023 from fifteen sectors covering the entire bay. The analysis involved descriptive analysis, correlation matrices, PCA, and Cluster analysis. Concentrations of Pb and Cd were below detection limits, while Cr and Zn concentrations were below saltwater aquatic life preservation standards. However, As and Ni concentrations reached 49.55 μg/L and 12.71 μg/L respectively during autumn 2022 and summer 2023, exceeding international standards. The HPI indices, calculated using As, Cr, Ni, and Zn concentrations, indicated poor seawater quality during winter (HPI = 69.52) and spring (HPI = 75.08), and totally inadequate quality with likely adverse health effects during autumn (HPI = 114.64) and summer (HPI = 116.79). The study recommends continuous monitoring and integrated management to preserve the bay's biodiversity and ensure future sustainability.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"265 ","pages":"Article 107624"},"PeriodicalIF":4.8,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654571","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}