Ocean & Coastal Management最新文献

{"title":"A rapid bycatch assessment framework for small-scale fisheries: A case study on horseshoe crab (Tachypleus tridentatus) bycatch","authors":"Xiaohai Chen ,&nbsp;Mujiao Xie ,&nbsp;Juan Feng ,&nbsp;Jixing Zou ,&nbsp;Jun Shi ,&nbsp;Lifeng Zhuang ,&nbsp;Jianmei Deng ,&nbsp;Xiaoyong Xie","doi":"10.1016/j.ocecoaman.2025.107701","DOIUrl":"10.1016/j.ocecoaman.2025.107701","url":null,"abstract":"<div><div>Timely bycatch data is crucial for detecting rare and endangered species impacted by small-scale fisheries, supporting sustainable management. Horseshoe crabs (<em>Tachypleus tridentatus</em>), valued for the utility of their blood cells for detecting bacterial endotoxins, continue to be harvested despite their demographically vulnerable status and declining populations. Timely bycatch monitoring is crucial to limit further fishery mortality and enforce species-specific bycatch quotas. By combining local ecological knowledge surveys, deep learning algorithms, and remote sensing techniques, this study developed a framework for rapidly assessing <em>T</em>. <em>tridentatus</em> bycatch and associated indicators. The framework estimates that at least 9120 ± 315 <em>T</em>. <em>tridentatus</em> are bycaught annually in Leizhou Bay, China, with a catch per unit effort (CPUE) of 0.29 ± 0.01 <em>T</em>. <em>tridentatus</em> per vessel per month. Bycatch rates are significantly higher in gillnet fisheries than in trawl fisheries, and the probability of incidental capture is notably greater during the spring and autumn seasons. Additionally, bycatch intensity exhibits significant spatial heterogeneity, indicating areas where protection efforts should be prioritized. The results of this study underscored the severity of <em>T</em>. <em>tridentatus</em> bycatch in coastal regions and indicate measures to reduce bycatch at the institutional, technical, and operational levels. These recommendations, while focused on <em>T</em>. <em>tridentatus</em>, offer a broader framework for conserving other vulnerable species.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107701"},"PeriodicalIF":4.8,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835032","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":"Shoreline change, sea level rise and the impacts along the coastline of Walvis Bay, Namibia","authors":"Aili Nauyele Nghiningwa ,&nbsp;Ibidun O. Adelekan ,&nbsp;Zachariah Haruna Mshelia","doi":"10.1016/j.ocecoaman.2025.107690","DOIUrl":"10.1016/j.ocecoaman.2025.107690","url":null,"abstract":"<div><div>Coastal erosion is a global threat impacting communities worldwide. Traditional “action-reaction” management approaches using grey infrastructure are often employed, but there's a growing interest in nature-based solutions (NBS) for a more sustainable approach. This study examines coastal dynamics and the impact of climate change-induced sea level rise on Walvis Bay. Walvis Bay, with a low elevation, is highly vulnerable to erosion due to its geographic location and lack of natural protection. The study analyses shoreline changes between 1992 and 2023 using remote sensing and GIS techniques. Landsat images were used with the Digital Shoreline Analysis System (DSAS) using Linear Regression Rate (LRR), End Point Rate (EPR) and Net Shore Movement (NSM) to assess erosion and accretion. Furthermore, information on community knowledge and current adaptation strategies was obtained through questionnaires and interviews. Walvis Bay faces a substantial threat from coastal erosion due to sea level rise. The average erosional rate is −2.8 m/year for EPR and LRR. This indicates significant erosion in some sections of the sandspit, where land is being lost at a rapid pace. While the average accretional rate is about 3 m/year for EPR and LRR, where portions of the sandspit is gaining land at a rate higher than that of erosion. The study highlights the importance of employing a combination of scientific knowledge and community knowledge for effective coastal management. The findings suggest a need for proactive measures, potentially including NBS, to adapt to future shoreline changes and protect vulnerable coastal communities.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107690"},"PeriodicalIF":4.8,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834933","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":"Incorporating giant kelp connectivity into management strategies in the southeast Pacific","authors":"G. Thompson-Saud ,&nbsp;A. Grech ,&nbsp;S. Choukroun ,&nbsp;S.I. Vásquez ,&nbsp;A. Ospina-Alvarez","doi":"10.1016/j.ocecoaman.2025.107661","DOIUrl":"10.1016/j.ocecoaman.2025.107661","url":null,"abstract":"<div><div>Intensive harvesting and climate change affect the delivery of multiple ecosystem services provided by giant kelp, <em>Macrocystis pyrifera,</em> in the Southeast Pacific region. Amid these threats, dispersal and connectivity are crucial processes that support the replenishment and recovery of giant kelp, yet they remain poorly understood. Here, we assess the connectivity of giant kelp in the Southeast Pacific to inform its conservation and management. To achieve this, we use the outputs of a biophysical model and network analysis to identify critical source and sink areas and key connectivity corridors at multiple spatial and temporal scales. We also assess the influence of seasonal and El Niño Southern Oscillation (ENSO) variability on connectivity in the region. We found that the southern population (36–43°S) is the highest priority for management (e.g. no-take zone) as it serves as a crucial source-sink area, playing a fundamental role in propagule dissemination, local retention and non-local retention. We also identified changes in the connectivity within the central population (28-35°S), influenced by both ENSO events and seasonal variability. Adaptive management strategies, including temporal harvest closures, are recommended to address both inter and intra-annual fluctuations in connectivity. Additionally, through the delineation of management units based on population connectivity, we identify key source areas within each unit that warrant protection. The outputs of our study underscore the importance of integrating connectivity and regional environmental dynamics into conservation frameworks to enhance the resilience of kelp forests in the Southeast Pacific and elsewhere.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107661"},"PeriodicalIF":4.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829194","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":"Machine learning-based detection of dynamic changes in mangrove forest, Beilun Estuary","authors":"Chuqi Long ,&nbsp;Zhijun Dai ,&nbsp;Xuefei Mei ,&nbsp;Xixing Liang ,&nbsp;Xuewei Zhang ,&nbsp;Yangyang Xi ,&nbsp;Riming Wang ,&nbsp;Nguyen An Binh ,&nbsp;Cong Mai Van ,&nbsp;Jinping Cheng","doi":"10.1016/j.ocecoaman.2025.107696","DOIUrl":"10.1016/j.ocecoaman.2025.107696","url":null,"abstract":"<div><div>While mangrove forests in river-dominated estuaries have been extensively studied, wave-dominated estuarine mangroves have received relatively little attention. Here, a comprehensive analysis of mangrove forests in the Beilun Estuary, a typical wave-dominated estuary and the transboundary estuary between China and Vietnam, was conducted using a machine learning of continuous change detection and classification algorithm. The results revealed that the total area of mangrove forests in the Beilun estuary increased by 11.2 % during the period from 1986 to 2000, followed by a slight decline from 2000 to 2022. Over the past 37 years, a total of 568.4 ha of mangroves were lost, primarily on the landward side of the estuary's western part. However, this loss was offset by a gain of 688.1 ha, with newly established mangroves predominantly located behind the western barrier islands, as well as in the central and eastern parts of the estuary. Meanwhile, the shoreline of mangrove forests in the western part remained stable, while the central and eastern parts of the estuary presented seaward expansion at a slow rate of 2.1 ha/yr and 1.7 ha/yr, respectively. These findings suggest that the southeast waves limited the seaward expansion of mangrove forests in western estuary, while the combined action of tidal currents and waves resuspended and transported sediments to fill the tidal creeks, providing habitats for mangroves. Barrier islands formed by strong waves create a sheltered environment for mangrove growth. Land-use conversion to aquaculture ponds is the primary driver accounting for the loss and fragmentation of mangrove forests. However, the sea-level rise, at an increasing rate of 3.38 mm/yr, has not impeded the seaward expansion of mangroves in the Beilun Estuary. This research provides a profound perspective on dynamic changes in mangrove forests within a typical wave-dominated estuary, which can serve as a crucial reference for the future conservation and restoration strategies in a global scale.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107696"},"PeriodicalIF":4.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835031","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":"Nature-based solutions for coastal restoration during urbanization: Implications of a case study along Chaoyang Port Coast, China","authors":"Shasha Liu ,&nbsp;Feng Cai ,&nbsp;Nelson Rangel-Buitrago ,&nbsp;Yongzhi Peng ,&nbsp;Michael Wagreich ,&nbsp;Tianyu Zhang ,&nbsp;Pengkai Wang","doi":"10.1016/j.ocecoaman.2025.107691","DOIUrl":"10.1016/j.ocecoaman.2025.107691","url":null,"abstract":"<div><div>In the Anthropocene, human activities have induced profound and irreversible alterations to the Earth system, with coastal erosion and inundation emerging as critical natural hazards that threaten human life and property. Adaptive responses traditionally rely on singular nature-based solutions (NbS), also known as “Living shorelines”—whether hard structures, soft engineering, or vegetation. However, instances of multiple NbS being employed together are seldom studied, particularly on morphologically complex coasts. This study examines China's governmental policy frameworks for coastal climate adaptation at the national, provincial and urban levels and presents an application of multiple NbS implementations at Chaoyang Port Coast, Weihai city, as a case study. Our findings demonstrate that integrated policies and urban development strategies effectively drive coastline protection while necessitating nature-based approaches. This study demonstrates that combined management measures—encompassing beach remediation, gabion seawalls, and coastal shelter belts—create a robust spatial ecological disaster mitigation system in complex and vulnerable coastal environments. We propose three critical recommendations for successful long-term coastal restoration: sustained political commitment, enhanced public participation in local economic growth, and the advancement of NbS technologies. Through an analysis of coastal management policies and practical NbS applications, this research not only highlights China's commitment to environmental governance but also provides a practical paradigm for shoreline management that is applicable to coastal cities in China and other coastal nations worldwide.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107691"},"PeriodicalIF":4.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829199","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":"Geoportals in marine spatial planning: state of the art and future perspectives","authors":"Luciano Bosso ,&nbsp;Francesca Raffini ,&nbsp;Luca Ambrosino ,&nbsp;Raffaele Panzuto ,&nbsp;Claudia Gili ,&nbsp;Maria Luisa Chiusano ,&nbsp;Marco Miralto","doi":"10.1016/j.ocecoaman.2025.107688","DOIUrl":"10.1016/j.ocecoaman.2025.107688","url":null,"abstract":"<div><div>Geoportals have been employed to generate integrated information and support research and decisions on the sustainable development and preservation of natural resources. They provide a substantial contribution to the monitoring and management of biodiversity, ecosystems functionality, and global health.</div><div>Here, we provide an overview of the potential application of geoportals linked to Marine Spatial Planning (MSP) to support stakeholders in marine science and facilitate the establishment of new geoportals for marine data.</div><div>We analysed 147 geoportals and most of them were mainly equipped for global-scale processing. We noted an important increase of interest towards geoportals: from 710 in September 2005 to 1469 in October 2024. The European and Asiatic countries resulted the most representative regions increasing geoportal numbers and related queries.</div><div>The continuous development, use, and improvement of geoportals will consistently support the decision-making process in MSP. Geoportals that are easy to access and query, and following the FAIR (Findable, Accessible, Interoperable and Reusable) data principles will substantially contribute to the exploration of the undiscovered parts of our planet, ensuring tools aimed to the safety of the oceans from hazards and climate changes, to sustainable ecosystem services (eg. energy and food consumption) and to effectively manage the ocean space.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828394","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":"Maritime security threats: Classifying and associating patterns in piracy and armed robbery incidents","authors":"Coskan Sevgili ,&nbsp;Erkan Cakir ,&nbsp;Remzi Fiskin","doi":"10.1016/j.ocecoaman.2025.107685","DOIUrl":"10.1016/j.ocecoaman.2025.107685","url":null,"abstract":"<div><div>Piracy and armed robbery (P&amp;AR) incidents are one of the most significant security problems for the maritime industry. These incidents, which negatively affect maritime activities and cause disruptions in the global supply chain, continue in many different parts of the world. This study focuses on the Gulf of Guinea, the region with the highest occurrence of P&amp;AR today. The study begins with data pre-processing, applied to a total of 1076 P&amp;AR reports from the Gulf of Guinea, sourced from the Global Integrated Shipping Information System (GISIS) database. Various machine learning (ML) algorithms are then utilized to determine the best-performing model for imputing missing data. Next, the Chi-square Automatic Interaction Detection (CHAID) algorithm is employed to classify P&amp;AR incidents. Finally, the Apriori algorithm, a method from Association Rule Mining (ARM), is used to uncover hidden relationships and associations within the dataset. Additionally, the findings are visualised to make interpreting the results more accessible and transparent. The analysis results reveal that weapons, coastal authority, and ship size have a significant impact on the occurrence of attacks. Robbery attacks typically target storerooms using knives during night port activities. In contrast, kidnapping incidents involve armed attackers directly targeting the accommodation areas of ships with low tonnage and speed. In hijacking incidents, large groups of attackers operate in international waters, primarily targeting tanker ships aged over 12 years with low freeboard. In conclusion, the findings of this study aim to assist authorities and ship operating in the region in implementing necessary precautions.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107685"},"PeriodicalIF":4.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835030","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":"Distribution modelling of jellyfish in Spanish coastal areas: An approach based on the maximum entropy principle","authors":"Jairo Castro-Gutiérrez ,&nbsp;Juan Carlos Gutiérrez-Estrada ,&nbsp;Juan Jesús Bellido ,&nbsp;José Carlos Báez","doi":"10.1016/j.ocecoaman.2025.107694","DOIUrl":"10.1016/j.ocecoaman.2025.107694","url":null,"abstract":"<div><div>Jellyfish blooms are natural events with significant ecological and socio-economic impacts, particularly in regions like the Andalusian Mediterranean coast, where tourism is an important industry. This study employs Maximum Entropy (MaxEnt) species distribution model to predict jellyfish presence using citizen science data from the Infomedusa app and environmental variables derived from the Copernicus platform. In particular, while users reports do not enforce species-level identification, <em>Pelagia noctiluca</em> likely dominated the sightings in our study region. Presence-only data from summer 2019 were analyzed alongside key environmental factors from March to September. The models consistently identified the mixed layer depth in April as the most influential variable, contributing between 72.7 % and 93.9 % to the probability distribution, highlighting the role of early spring conditions in shaping summer jellyfish dynamics. The results revealed spatial and temporal patterns in jellyfish presence, providing valuable insights for coastal management and early-warning systems. To validate the MaxEnt predictions, observed absence data were used to compare areas of low predicted probability of jellyfish presence with high densities of observed absences, revealing a moderate level of agreement, with 22.58 %–37.13 % coincidence between low-probability MaxEnt predictions and areas of high absence density. While the study is limited to a single summer season due to data availability, it highlights the potential of integrating advanced modeling techniques with crowd-sourced data, this study underscores the value of citizen science for marine ecology and highlights the importance of proactive strategies to mitigate the socio-economic impacts of jellyfish blooms on local communities and ecosystems. These findings can inform regional planning and contribute to global efforts to address gelatinous zooplankton proliferation.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107694"},"PeriodicalIF":4.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829200","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":"Intelligent detection and emission characteristics analysis of black smoke and blackness from navigating ships: A case study of Shanghai waters","authors":"Mengtao Deng ,&nbsp;Shitao Peng ,&nbsp;Jianbo Hu ,&nbsp;Zhongru Wang ,&nbsp;Xin Xie ,&nbsp;Lin Jiang ,&nbsp;Zhaoyu Qi","doi":"10.1016/j.ocecoaman.2025.107692","DOIUrl":"10.1016/j.ocecoaman.2025.107692","url":null,"abstract":"<div><div>Ship black smoke is a serious air pollution phenomenon, an important regulatory object for preventing and controlling ship air pollution. The traditional black smoke detection method is the Ringelmann smoke chart, which is highly subjective, has low detection accuracy, and is easily affected by environmental background and illumination variation. To solve the problems of the traditional Ringelmann smoke chart method, an intelligent ship black smoke intelligent tracking and detection algorithm is proposed, and an intelligent ship black smoke detection APP is developed. Secondly, 5224 cruising ships are monitored during the experiment, and 155 ships with black smoke are found. Then, the black smoke video of 155 ships was detected using the Ringelmann smoke chart method and the proposed method, respectively, and the experimental results demonstrate that the proposed method not only can reduce the influence of illumination variation and the differences in visual habits, but also has high detection accuracy. Moreover, the developed novel approach is a much more versatile method to be followed in general to efficiently and accurately check ship emissions for smoke blackness. Finally, a comprehensive analysis of the black smoke emission characteristics of ships in the waters of the Yangtze estuary was carried out. It was found that 0.15 % exceeded the Ringelmann blackness level of 2, providing a reference basis for the formulation of legal and regulatory documents.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107692"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829196","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-making and ecosystem service dimensions of managed dyke realignment in the complex coastal landscapes of the Bay of Fundy","authors":"Lara Cornejo ,&nbsp;Elson Ian Nyl Ebreo Galang ,&nbsp;Kate Sherren ,&nbsp;Jeremy Lundholm ,&nbsp;Danika van Proosdij ,&nbsp;Will Balser ,&nbsp;Elena Bennett ,&nbsp;Tony M. Bowron ,&nbsp;Kirsten Ellis ,&nbsp;Jonathan Fowler ,&nbsp;Jennifer Graham ,&nbsp;Patrick James ,&nbsp;David R. Lapen ,&nbsp;Patricia Manuel ,&nbsp;Mimi O'Handley ,&nbsp;Gavin Scott ,&nbsp;Alex Wilson","doi":"10.1016/j.ocecoaman.2025.107683","DOIUrl":"10.1016/j.ocecoaman.2025.107683","url":null,"abstract":"","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"266 ","pages":"Article 107683"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829195","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}