Journal of Sea Research最新文献

{"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":"2025-05-11","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}

{"title":"Distribution mechanism of Ocypodoidea in intertidal zone of north shore of Hangzhou Bay (Crustacea: Decapoda: Brachyura)","authors":"Chongfeng Liu ,&nbsp;Lin Yuan ,&nbsp;Jianliang Yao ,&nbsp;Huixian Wu ,&nbsp;Junzeng Xue","doi":"10.1016/j.seares.2025.102592","DOIUrl":"10.1016/j.seares.2025.102592","url":null,"abstract":"<div><div>The protection of estuarine intertidal zones is a global hotspot issue. Ocypodoidea crabs are key components of intertidal ecosystems. Understanding the driving mechanisms behind the distribution of Ocypodoidea crabs is of great significance for intertidal conservation. The study, which combined an intertidal zone survey with laboratory salinity selection experiments, investigated the distribution of Ocypodoidea and the environmental factors driving their distribution along the north shore of Hangzhou Bay. The results indicate that we collected a total of 6 Ocypodoidea species, among which <em>Uca arcuata</em>, <em>Macrophthalmus abbreviatus</em>, <em>Macrophthalmus banzai</em>, and <em>Ilyoplax deschampsi</em> were dominant. Under natural conditions, from the bay head to the bay mouth, the four Ocypodoidea crab species transition from freshwater-adapted species (<em>I. deschampsi</em>) to saltwater-adapted species (<em>U. arcuata</em>, <em>M. abbreviatus</em>, <em>M. banzai</em>) along the increasing salinity gradient. Laboratory experiments demonstrated that salinity had an indirect influence on the distribution of <em>I. deschampsi</em> possibly mediated by biological competition. These crabs prefer distinct substrate types (divided into vegetated salt marsh, bare muddy flats and bare sandy flats). <em>Macrophthalmus banzai and M. abbreviatus</em> inhabit bare muddy and sandy flats. <em>Ilyoplax deschampsi</em> adapts to both. <em>Uca arcuata</em> inhabits vegetated salt marsh together with those two flats. Differences in crab substrate preferences and the presence or absence of these substrate types across different sections further drive compositional differences in the Ocypodoidea community. Human activities have altered the distribution patterns of salinity and the aforementioned substrate types along the north shore of Hangzhou Bay, likely driving shifts in the spatial distribution of Ocypodoidea crabs.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102592"},"PeriodicalIF":2.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936575","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":"2025-05-06","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":"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":"2025-05-01","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":"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":"2025-04-24","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":"2025-04-21","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":"Joint risk analysis of typhoon hazards based on coupled ADCIRC-SWAN model simulations around Hainan, China","authors":"Weikang Jin ,&nbsp;Shoude Guan ,&nbsp;Liang Chen ,&nbsp;Ziyang Tang ,&nbsp;Mengya Huang ,&nbsp;Xing Xu ,&nbsp;Wei Zhao","doi":"10.1016/j.seares.2025.102587","DOIUrl":"10.1016/j.seares.2025.102587","url":null,"abstract":"<div><div>With rising sea level and increasing typhoon intensity under greenhouse warming, risk of typhoon-related hazards, including strong winds, storm surges and waves in coastal regions, is becoming increasingly severe. Hainan province of China, adjacent to the western North Pacific, is vulnerable to typhoon hazards. In this study, we constructed 65 typhoons using the Jelesnianski model to force the Advanced Circulation (ADCIRC)-Simulating Waves Nearshore (SWAN) coupled model and reproduced typhoon waves and surges, then assessed their extreme values around Hainan under 20-, 50-, and 100-year return periods. Taking Sanya station as an example, we further conducted joint risk analysis via considering bivariate and Trivariate hazard factors. The relative errors of modelled wind speed (V), significant wave height (SWH), and storm surge (S) are less than 10 % compared to in-situ observations. Using the Gumbel function, extreme values of V, SWH, and S under the 100-year return period around Hainan province can exceed 40 m s⁻¹, 15 m, and 2 m. After Kolmogorov test, the Gumbel-Hougaard Copula function was used to estimate bivariate and trivariate joint probability distributions at Sanya station and calculate the “OR” return periods of different joint events. The “OR” return period of three factors at the Sanya station under the 100-year extreme value is 48.79 years, indicating a high probability of simultaneous occurrence on account of their correlation. This study focused on the complex topography surrounding Hainan Island and utilized a coupled model to compensate for the limitation of synchronous observational data in typhoon joint risk analysis.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102587"},"PeriodicalIF":2.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855158","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":"Unprecedented oceanographic conditions in October 2024 around the Oyashio and Coastal Oyashio off the southeastern coast of Hokkaido, Japan","authors":"Hiroshi Kuroda ,&nbsp;Yukiko Taniuchi,&nbsp;Takuya Nakanowatari","doi":"10.1016/j.seares.2025.102588","DOIUrl":"10.1016/j.seares.2025.102588","url":null,"abstract":"<div><div>During October 2024, unprecedented oceanographic conditions were observed around the Oyashio and Coastal Oyashio in the North Pacific Ocean off the southeast coast of Hokkaido, Japan. A very strong anticyclonic mesoscale eddy, the “Kuroshio Warm Core Ring (KWCR)”, detached from the Kuroshio Extension, which had abnormally overshot, and approached the southeast coast of Hokkaido. Extremely large, positive anomalies of temperature and salinity with a maximum of 14.1 °C and 1.61, respectively, were detected on the slope where the Oyashio flows in normal years. Isopycnal surfaces with extremely large downward displacements from their mean positions reached a maximum of 413 dbar. The approach of the KWCR to the coast caused unusual oceanographic conditions on the shelf. Kuroshio Water with salinities ≥33.7 and temperatures ≥5 °C spread from the KWCR and was identified at a regular monitoring station on the shelf for the first time since 1987. The Coastal Oyashio, a nearly stable westward coastal boundary current, disappeared from the western part of the shelf and was replaced by eastward currents parallel to the anticyclonic flows of the KWCR. The intrusion of the Oyashio into the study region weakened in October 2024. However, because a similar tendency of weakening has been apparent since autumn 2019, the weakening of the Oyashio was not attributable solely to the stagnation of the KWCR.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102588"},"PeriodicalIF":2.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860157","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":"Unravelling temporality and environmental drivers of jellyfish presence in an urban beach","authors":"J. Roca ,&nbsp;F. Tuya ,&nbsp;M. Gómez ,&nbsp;F. Machín","doi":"10.1016/j.seares.2025.102584","DOIUrl":"10.1016/j.seares.2025.102584","url":null,"abstract":"<div><div>Jellyfish blooms affect human activities, causing negative socio-economic impacts. Many questions regarding the presence of these invertebrates remain unknown, including when and why they appear. The aim of this study was to unravel when and which environmental drivers drive the arrival of jellyfish to the urban beach of Las Canteras (Canary Islands), by taking advantage of a long-term temporal series on jellyfish stings and semi-qualitative abundances of three jellyfish species (<em>Physalia physalis</em>, <em>Velella velella</em> and <em>Pelagia noctiluca</em>), provided by the Red Cross rescue service. First, we described inter- and intra (seasonal) annual patterns. Then, daily patterns in stings and monthly jellyfish abundances, by means of a model selection strategy, were connected with daily and monthly environmental drivers (zooplankton biomass, Sea Surface Temperature, SST, wind intensity, as well as climatic indices related to El Niño and La Niña events). We detected a strong seasonal trend in the number of jellyfish stings, with larger values in spring and summer relative to autumn and winter. <em>Physalia physalis</em> and <em>Velella velella</em> appeared during winter, which was also revealed by the model selection approach on the effect of environmental predictors (SST, in particular) on their abundances. In contrast, <em>Pelagia noctiluca</em> -the most abundant species - was present all year round, with the summer months as those with the highest abundances. There was a significant correlation between the daily number of stings and the daily presence of <em>Pelagia noctiluca</em> over time. In brief, the occurrence of the three jellyfish species, in the study area, is seasonally partitioned, with SST over time as the most relevant environmental predictor of both the number of stings and the abundances of the three jellyfish species.</div></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":"205 ","pages":"Article 102584"},"PeriodicalIF":2.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855062","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":"2025-03-26","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}