Journal of Sea Research最新文献

{"title":"Resilience solution to solve prisoner's dilemma in port shore power usage: The value of government subsidies on port","authors":"Zhening Ye ,&nbsp;Jie Wang ,&nbsp;Junjin Wang","doi":"10.1016/j.seares.2025.102578","DOIUrl":"10.1016/j.seares.2025.102578","url":null,"abstract":"<div><div>As environmental pollution increases and pollutants emitted by ships pose a threat to the environment and health, port shore power has become an effective means of reducing pollution from ships. However, shipping companies are affected by fuel prices and may ignore environmental issues and jeopardize social welfare in pursuit of their own interests. Therefore, government intervention is particularly important, especially through subsidies to solve the conflict between competition among shipping companies and environmental pollution. This study develops a three-tier supply chain model incorporating governmental authorities, port operators, and dual shipping companies to examine shore power adoption strategies. Through Nash equilibrium analysis, we investigate the efficiency of shore power utilization under both subsidized and non-subsidized scenarios in order to find the resilience solution for the relevant stakeholders. The findings reveal that in the absence of government intervention, shipping companies' equilibrium strategies are primarily determined by the relative costs of conventional fuel and shore power, leading to potential Prisoner's Dilemma situations. The introduction of government subsidies enhances the likelihood of achieving stable equilibrium for both shipping companies while mitigating the Prisoner's Dilemma effect. The study provides references of resilience solution for related fields and policy recommendations for parties in the port and shipping supply chain.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102578"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accelerated Ocean thermal expansion and its contribution to Global Sea-level rise","authors":"Ting-Yu Liang ,&nbsp;Shih-Chun Hsiao ,&nbsp;Han-Lun Wu ,&nbsp;Hongey Chen ,&nbsp;Wei-Bo Chen","doi":"10.1016/j.seares.2025.102589","DOIUrl":"10.1016/j.seares.2025.102589","url":null,"abstract":"<div><div>Global ocean heat content (GOHC) changes are crucial to understanding climate change, as oceans store about 91 % of the excess heat in the climate system. The thermal expansion of oceans significantly contributed to sea level rise in the twentieth century and will likely remain a major factor in the twenty-first century. This study analyzed decades of data from global ocean reanalysis and satellites, revealing that from 2014 to 2023, the annual rates of increase in GOHC and global mean sea level (GMSL) were 45.2 ± 1.78 MJ/m² and 4.7 ± 0.23 mm, respectively. These rates are 1.7 and 1.8 times higher than those of the previous four decades. Thermal expansion alone accounts for 56 % of the total GMSL rise. A 1 °C increase in global ocean temperature would result in a 0.89-m rise in GMSL due solely to thermal expansion. GOHC variations align with GMSL changes monthly, though a three-month delay is observed in regions such as Southwest China, the Indochinese Peninsula, and the coastal Middle East. Significant increases in both GOHC and GMSL are most evident in the 20°N–40°N and 20°S–40°S regions. Since the late 1980s, greenhouse gas emissions have overtaken solar radiation as the primary driver of ocean temperature increases. Since the 1990s, the Earth's energy imbalance (EEI) has remained positive, with an annual increase of 0.03 ± 0.016 W/m², indicating excess heat accumulation.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102589"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional thermohaline reconstruction of mesoscale eddies under remote sensing observation: From the perspective of deep learning of layer depth sequences with fusion of physical mechanisms","authors":"Lei Zhang ,&nbsp;Xiaodong Ma ,&nbsp;Xiang Wan ,&nbsp;Weishuai Xu ,&nbsp;Xiaoqing Sun ,&nbsp;Maolin Li","doi":"10.1016/j.seares.2025.102593","DOIUrl":"10.1016/j.seares.2025.102593","url":null,"abstract":"<div><div>Mesoscale eddies significantly impact the thermohaline structure of the ocean on a global scale. However, current three-dimensional reconstruction techniques for mesoscale eddies, based on multi-source data fusion, tend to focus on the profile while neglecting the depiction of mesoscale eddies in higher dimensions through three-dimensional structures. To address this issue, we first propose a hybrid recognition algorithm for mesoscale eddies. We then extract the dataset based on the recognition results and ocean reanalysis, transforming the mesoscale eddies reconstruction problem into a prediction problem of layer depth sequences, and implement the model construction using deep learning technology. Simultaneously, we incorporate the globally uniform vertical and horizontal structure of mesoscale eddies into the model input module as a binding physical mechanism and add an attention mechanism to enhance the model's output. Experiments demonstrate that the model developed in this paper performs comparably to the base model in deep learning metrics, exhibits specific advantages in measuring the three-dimensional structure of mesoscale eddies from multiple perspectives, and shows robust generalization across different oceanic regions and data sources. Inspired by the work of many researchers, this paper achieves promising results in the three-dimensional reconstruction of mesoscale eddies, offering valuable insights for deep learning research in marine data-related fields.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102593"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Generating ecologically relevant oxygen fluctuations using marine primary producers under laboratory conditions","authors":"Aníbal Sánchez ,&nbsp;Paula Celis-Plá ,&nbsp;Marco Fusi ,&nbsp;Lucas Bravo-Guzmán ,&nbsp;Simone Baldanzi","doi":"10.1016/j.seares.2025.102590","DOIUrl":"10.1016/j.seares.2025.102590","url":null,"abstract":"<div><div>Incorporating near-natural variation of marine environmental variables into experimental designs is becoming imperative to make ecologically relevant inferences about ecophysiological responses to climate global change. Dissolved Oxygen (DO) is among the most important environmental variable in marine ecosystems and fluctuates strongly in coastal habitats, due to physical and biological phenomena. However, many technical challenges are still imposing high-cost equipment to ensure a complete mimicry of DO fluctuations in manipulative experiments. Here, we propose a simple and cost-effective methodology to simulate the oxygen fluctuations in the laboratory through to marine primary producers as source of natural fluctuations. We tested the physiological status (Yield II and <em>F</em>_<em>v</em><em>/fm</em>) as a proxy of oxygen evolution, and photoprotective responses (phenolic production), as metabolic stress indicator in five different biomasses (200–400–600-800-1000 g; that correspond to 6–12–18-24-30 g l⁻¹, respectively) of the macroalgae <em>Lessonia spicata</em> exposed to 7 days of artificial light (photoperiod of 12:12 h day: night) within replicated aquaria. We showed that each biomass exhibited a unique fully functional oxygen fluctuating profile with different average DO saturations, harmonic oscillations and rates of DO production/consumption. Biomasses &lt;600 g showed no significant changes in the physiological status of macroalgae (Yield II and <em>F</em>_<em>v</em><em>/fm</em>) and photoprotective responses (phenolic production) during the 7 days experiment, while effects of the environmental stress were found at greater biomasses (800 and 1000 g). We successfully tested a method that can produce daily cycles of DO fluctuations in seawater trough to marine primary producers under controlled environment conditions. Our quantitative method provides cost-effective control the DO fluctuations in experimental set-ups with the use of a primary producers that can be replicated at low cost in virtually any laboratory worldwide using other species of marine algae, representing a highly effective method to control experimental settings that involve testing of fluctuating and ecologically relevant levels of dissolved oxygen.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102590"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A systematic review and bibliometric analysis for maritime emergency management","authors":"Yaxiong Han ,&nbsp;Liangyong Chu","doi":"10.1016/j.seares.2025.102585","DOIUrl":"10.1016/j.seares.2025.102585","url":null,"abstract":"<div><div>With the continued growth of the global maritime economy and trade, the shipping industry faces a variety of safety and security challenges. Maritime safety management(MSM) and maritime emergency management(MEM) are complementary to each other, and together they form a comprehensive maritime safety system. The International Maritime Organization (IMO) has established a framework for MEM through a series of conventions. Existing review articles in the field of MSM focus more on the prevention and control of maritime accidents. However, there is a significant lack of systematization for MEM research focusing on the response and disposal of maritime emergencies. To achieve this, this paper first identified 1399 important papers on MEM research from the China National Knowledge Infrastructure (CNKI) and Web of Science (WoS) databases from 2000 to 2024 by screening using PRISMA flow diagram. Second, the knowledge map of MEM research was constructed by using the bibliometric analysis tools CiteSpace and VOSviewer. Then, through the multidimensional analysis of the knowledge map for MEM research, the lineages, themes, hotspots, and trends of MEM research were systematically clarified. Finally, suggestions for the future development of MEM are made from the three dimensions. The systematic review of MEM research in this paper could help researchers to clarify the hotspots and trends for current MEM research, and provide new perspectives and theoretical support for research in this field.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102585"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of climate-related financial policies in improving marine living resources toward sustainable blue economy over quantiles","authors":"Le Thanh Ha","doi":"10.1016/j.seares.2025.102586","DOIUrl":"10.1016/j.seares.2025.102586","url":null,"abstract":"<div><div>The purpose of this study is to empirically investigate how climate-related financial policies affect marine living resource performance in order to demonstrate how they contribute to a sustainable blue economy. We use five different indicators to evaluate blue economies' efficiency and sustainability in European regions. These indicators include the value added at the factor costs of small-scale capture fisheries; shellfish aquaculture; freshwater aquaculture; marine aquaculture; and large-scale capture fisheries. The findings of our assessment show how crucial climate-related measures are to increasing the sustainability of the blue economy in the European area between 2010 and 2019. The research findings reveal the varying impacts of climate-related financial policies on blue economy sustainability across different quantiles.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102586"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of inspection and transit scheduling for imported refrigerated containers under public health emergencies","authors":"Qianli Ma ,&nbsp;Wenbo Wu ,&nbsp;Hongxiao Liu ,&nbsp;Bo Wang ,&nbsp;Hao Li","doi":"10.1016/j.seares.2025.102583","DOIUrl":"10.1016/j.seares.2025.102583","url":null,"abstract":"<div><div>The COVID-19 pandemic has highlighted the urgent need for policy-driven improvements in inspection protocols at international ports, particularly for refrigerated goods, which are vulnerable to virus transmission through external packaging. This study addresses the increased inspection demands during health emergencies, where inspection rates may rise from 10 % to 100 %, requiring a combination of advanced scanning technologies and meticulous manual checks. Such escalated inspection efforts inevitably lead to substantial logistical backlogs, exacerbating port congestion, prolonging dwell times, and increasing the risk of cargo spoilage due to temperature fluctuations. This study introduces a sophisticated scheduling model for container inspection operations, designed to align with current health policy frameworks. The model incorporates specific time windows and temperature controls to mitigate the risks associated with extended storage times. Furthermore, it examines the policy implications of varying the deployment of Automated Guided Vehicles (AGVs) and inspection platforms to optimize throughput and minimize operational delays during crises. Empirical results suggest that prioritizing the expansion of inspection infrastructure, coupled with strategic AGV adjustments, significantly enhances operational efficiency and ensures compliance with health policies during emergencies.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102583"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the applicability of 28S rRNA and COI genes in the molecular identification of planktonic copepods from the Northwest Pacific","authors":"Dandan Wu ,&nbsp;Yuefan Wang ,&nbsp;Jinchen Li ,&nbsp;Bilin Liu ,&nbsp;Gaohua Ji","doi":"10.1016/j.seares.2025.102581","DOIUrl":"10.1016/j.seares.2025.102581","url":null,"abstract":"<div><div>Copepods are a crucial component of marine ecosystems, serving as a primary food source for numerous marine species and playing a significant role in aquatic food webs. Traditional morphological identification methods are often challenging due to the small size and subtle morphological differences among species. Molecular identification techniques have emerged as powerful tools for species discrimination. This study evaluates the effectiveness of the nuclear 28S ribosomal RNA (28S rRNA) and mitochondrial cytochrome <em>c</em> oxidase I (COI) genes in identifying copepod species from the Northwest Pacific. Zooplankton samples were collected using vertical net tows from 32 stations across an area of 1,320,000 km² in the Northwest Pacific. We analyzed sequences and conducted phylogenetic analyses on planktonic copepods. We obtained 110 valid 28S rRNA sequences from 45 species, representing 2 orders, 15 families, and 29 genera, and 62 valid COI sequences from 30 species. Notably, this study provides the first 28S rRNA and COI sequence data for <em>Euchaeta tenuis</em>, <em>Euchirella indica</em> and <em>Scolecithricella vittata.</em> Our findings indicate that the average interspecific genetic distances for 28S rRNA and COI are approximately 93.0 and 53.0 times higher, respectively, than the average intraspecific genetic distances, meeting the requirements for DNA barcoding. While COI-based barcodes exhibited distinct barcode gaps, 28S rRNA showed a 7 % overlap between intra- and interspecific genetic distances; however, Jeffries-Matusita (J-M) statistical test confirmed a significant gap for 28S rRNA. Compared to COI, 28S rRNA is more effective in delineating genera and higher taxonomic levels such as families revealed by phylogenetic analyses. Additionally, 28S rRNA demonstrated higher amplification success rates and comparable species-level identification performance to COI.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102581"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From behind bars to freedom: understanding the size selection of fish sorting grids","authors":"Nadine Jacques ,&nbsp;Bent Herrmann ,&nbsp;Manu Sistiaga ,&nbsp;Jesse Brinkhof","doi":"10.1016/j.seares.2025.102595","DOIUrl":"10.1016/j.seares.2025.102595","url":null,"abstract":"<div><div>Rigid sorting grids are used in demersal trawl fisheries globally. However, in some fisheries, such as the Barents Sea demersal trawl fishery, they have been found to release large quantities of target-sized catch while simultaneously retaining too many undersized fish. Several studies have documented this issue but an in-depth understanding regarding the exact reasons for these results is still lacking. Thus, the present study investigated whether so-called fall-through experiments conducted in the laboratory for cod (<em>Gadus morhua</em>), haddock (<em>Melanogrammus aeglefinus</em>) and redfish (<em>Sebastes</em> spp.) could shed light on this matter. Predictive models based on these results, enabled a more detailed understanding of the size selection pattern from fishing trials for these species. The models revealed that the unintended release of target-sized cod and haddock occurs because a significant fraction of the fish entering the trawl squeezes themselves between the sorting grid bars to escape. For redfish, approximately 85 % of the contribution on the selectivity curve could be attributed to redfish squeezing themselves through the grid bar spacings to escape compared to when we considered that they do not squeeze (approximately 15 %). The unintended retention of undersized cod and haddock could be explained by the fact that many fish made contact with the grid with a suboptimal body orientation. The method applied enabled us to gain detailed insight into the interaction between fish and sorting grids and could potentially be applied to gain an understanding of the performance of other selectivity devices used in trawl fisheries.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102595"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The spatiotemporal dynamics of reef benthic communities in local marine protected areas: A case study of Vamizi Island","authors":"Bibiana Américo Fernando Nassongole ,&nbsp;Lene Buhl-Mortensen ,&nbsp;Ana Hilário ,&nbsp;Victor Quintino ,&nbsp;Isabel Marques da Silva","doi":"10.1016/j.seares.2025.102591","DOIUrl":"10.1016/j.seares.2025.102591","url":null,"abstract":"<div><div>Research on coral reef ecosystems highlights ongoing degradation driven by local and global factors, leading to biodiversity loss and a shift from hard coral to macroalgae communities. However, other reef components, such as soft corals, receive less attention. This study examines the temporal dynamics of benthic communities and the impact of fisheries closures on sessile reef organisms after a protected area was established. We aimed to assess benthic community changes, particularly a potential shift toward soft corals, before and after protection. Photo-quadrat transects were conducted at four sites, two inside and two outside the protected area, with surveys in 2006, 2012, 2014, and 2022 by SCUBA divers. Results showed no statistically significant differences between protected and unprotected areas but revealed site-specific fluctuations over time. Protection did not significantly alter the overall benthic composition, likely due to initial site heterogeneity and the limited timeframe for detecting changes. The lack of a shift from hard to soft corals outside of the protected area suggests nutrient availability may influence coral dynamics more than overfishing. Alternatively, unprotected sites may have avoided degradation due to increased public awareness and local conservation efforts. These findings emphasize the need for long-term monitoring to evaluate the effectiveness of implementing protected areas and inform conservation strategies for reef ecosystems.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102591"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}