Estuarine Coastal and Shelf Science最新文献

{"title":"A fuel-cell-type seabed-level sensor for monitoring bathymetric evolution","authors":"Kyeongmin Kim ,&nbsp;Tadashi Hibino ,&nbsp;Yasuyuki Nakagawa","doi":"10.1016/j.ecss.2025.109281","DOIUrl":"10.1016/j.ecss.2025.109281","url":null,"abstract":"<div><div>This study presents the development and application of a fuel-cell-type (FCT) sensor to monitor seabed levels in sandy and cohesive sediment environments. The FCT sensor, which utilizes dissolved oxygen as a fuel, enables sensitive bathymetry monitoring via a spontaneous electric current. Laboratory experiments demonstrated that the current, internal resistance, and redox potential are key parameters for identifying sediment texture (sand vs. mud) and estimating the bulk density of the mud. Field tests validated the ability of the sensor to monitor changes in muddy sand seabed levels in near real time. The robust performance of the FCT sensor under various conditions appears to enable its application for automated and continuous monitoring of seabed evolution and infrastructure stability in coastal and marine environments.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109281"},"PeriodicalIF":2.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can we accurately extract ocean tides from satellite altimeter records with substantial missing values in shallow bays?","authors":"Haidong Pan ,&nbsp;Junchuan Sun ,&nbsp;Xiumin Gao ,&nbsp;Fei Teng ,&nbsp;Tengfei Xu ,&nbsp;Zexun Wei","doi":"10.1016/j.ecss.2025.109280","DOIUrl":"10.1016/j.ecss.2025.109280","url":null,"abstract":"<div><div>Tidal dynamics in coastal areas remain poorly understood, primarily due to the complexity of local topography and the scarcity of observational data. Although satellite altimeters have proven to be a powerful tool for providing comprehensive and accurate sea level observations across the global ocean, their effectiveness is highly limited in coastal regions due to land interference. Classical harmonic analysis (CHA) model employs ordinary least square (OLS) to estimate tidal parameters from coastal satellite altimeter records, suffering from the problem of over-fitting when the number of unknown tidal parameters is comparable to or more than the number of valid observations. In this paper, two regularization methods (i.e. ridge and Lasso regression) are utilized to replace OLS in the CHA model to address the issue of over-fitting and the interleaved Topex/Poseidon-Jason1 series is analyzed with substantial missing values in Liaodong Bay, China. Practical experiments unequivocally demonstrate the superiority of Lasso regression to ridge regression and OLS. The spatially-averaged errors of OLS, ridge regression and Lasso regression are 5.43 cm, 3.99 cm and 2.84 cm, respectively. Moreover, tidal parameters obtained by OLS display significant unnatural spatial discontinuities along the satellite track, which are substantially diminished by Lasso regression. It is noteworthy that tidal constituents with small amplitudes obtained by Lasso regression may be unreliable due to residual over-fitting. Overall, CHA with Lasso regression is a method that can be widely applied to analyze various types of sea level records with substantial missing values in shallow bays.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109280"},"PeriodicalIF":2.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term assessment of forcing conditions affecting the hydrodynamic structure of a stratified sea strait","authors":"Mehmet Ozturk,&nbsp;Furkan Altas,&nbsp;Cihan Sahin","doi":"10.1016/j.ecss.2025.109265","DOIUrl":"10.1016/j.ecss.2025.109265","url":null,"abstract":"<div><div>Sea straits are waterways characterized by stratified flow, in which the upper layer flow is driven by barotropic forcing while the lower layer flow is driven by the density difference between adjacent basins. The flow structures of a strait and the water bodies they are connected to are highly dependent on meteorological and hydrological conditions and change significantly as a result of extreme events in these conditions. The present study examines long-term variability in extreme meteorological and hydrological forcing conditions that control the hydrodynamic behavior of a sea strait, the Bosphorus, using 80-year (1931–2010) discharge data of the Danube River and 42-year (1979–2020) meteorological data. In addition to long-term trend analysis, extreme value analysis (EVA) was applied to both the maximum and minimum values of both parameters. In the Danube River discharges, trend directions have changed in successive 20-year periods from 1931 to 2010, but most of the trends are not significant except for the last 20 years of records. Extreme value analysis results indicate that both extreme maximum and minimum discharges are about 10 % greater in recent years (1971–2010) compared with earlier years (1931–1970). The wind conditions in the strait are less variable compared with freshwater discharges. However, the storm analysis indicates the occurrence of more energetic and short-lived storms in the Bosphorus in recent years with greater variability. The variation in extreme pressure differences is more notable, especially in the recent 20-year period. A 37 % decrease in minimum pressure difference, which means higher pressures at the southern entrance of the Bosphorus, indicates that extreme northward current events in the Bosphorus have decreased in recent years. This, combined with the increasing extreme river discharges, indicates a higher dominance of the brackish Black Sea water both in the hydrodynamics of the strait and the Sea of Marmara-northern Aegean Sea system in the future.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109265"},"PeriodicalIF":2.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracking long-term benthic recovery at a disused marine aggregate extraction site using monitoring tools developed for the marine aggregate industry","authors":"Paul S.O. McIlwaine,&nbsp;Peter J. Barry,&nbsp;Matthew Curtis,&nbsp;Keith M. Cooper","doi":"10.1016/j.ecss.2025.109278","DOIUrl":"10.1016/j.ecss.2025.109278","url":null,"abstract":"<div><div>Structural recovery of sediment habitats is predicted following removal of pressures from marine aggregate extraction, but long-term investigations are lacking. We demonstrate recovery of an extraction site to comparable control conditions for sediments (after 11 years) and macrofaunal assemblage (after 15 years) using the <em>Mahalanobis-test</em> and <em>Faunal Cluster ID</em> shiny R applications (available via <span><span>https://rconnect.cefas.co.uk/onebenthic_portal/</span><svg><path></path></svg></span>).</div><div>Similar levels of annelid diversity were observed between impacted and control sites eight years post-dredging while bryozoan diversity at the impacted site did not reach control conditions.</div><div>The observed changes in macrofaunal structure and cluster group allocation are likely in response to resumed dredging activity nearby.</div><div>The present study informs our understanding of benthic recovery following intensive aggregate extraction and validates current monitoring tools. Further confidence in these and the underlying approach will be provided through collection of seabed recovery data from additional sites, representing the full range of environmental conditions and dredging practices.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109278"},"PeriodicalIF":2.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Implications of improved remote sensing capabilities on blue carbon quantification","authors":"Steven W.J. Canty ,&nbsp;Miguel Cifuentes-Jara ,&nbsp;Jorge Herrera-Silveira ,&nbsp;Hannah K. Morrissette ,&nbsp;Jordan R. Cissell ,&nbsp;Joanna Acosta-Velázquez ,&nbsp;Emil Cherrington ,&nbsp;Ilka C. Feller ,&nbsp;Daniel A. Friess ,&nbsp;Jonathan S. Lefcheck ,&nbsp;Loraé T. Simpson ,&nbsp;Claudia Teutli-Hernandez","doi":"10.1016/j.ecss.2025.109275","DOIUrl":"10.1016/j.ecss.2025.109275","url":null,"abstract":"<div><div>Important developments in remote sensing capabilities allow for improved accuracy in the mapping of ecosystems. Higher spatial resolution imagery enables more precise classification of land use and land cover categories, which therefore changes our characterization of mapped land- and seascapes. These changes impact how we visualize these ecosystems, and how we quantify their ecosystem services and benefits to people. Here we examine how recent mapping advances influence the quantification of blue carbon for climate change regulation in mangrove ecosystems, using site, national, and global scale calculations. Overall, we found that higher resolution imagery was associated with a reduction in mangrove cover, and hence lower carbon stock estimates. It is important that these nuances are adopted and calibrated within the accounting of blue carbon, and ecosystem services more broadly, so that they do not undermine important initiatives designed to conserve and protect these critical ecosystems, such as Nationally Determined Contributions.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109275"},"PeriodicalIF":2.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Quantifying exposedness of the eastern Baltic Sea shores with respect to extremely high and low water levels","authors":"Katri Viigand ,&nbsp;Maris Eelsalu ,&nbsp;Tarmo Soomere","doi":"10.1016/j.ecss.2025.109267","DOIUrl":"10.1016/j.ecss.2025.109267","url":null,"abstract":"<div><div>Extremely high and low water levels are major sources of marine-induced danger to low-lying coastal areas and shallow waters. We explore options for quantification of this danger using parameters of the relevant Generalised Extreme Value (GEV) distributions and an ensemble of projections along the shores of Lithuania, Latvia and Estonia, including the Gulf of Riga, in the eastern Baltic Sea. The novel aspect is the exploration of the likelihood to have a greatly larger magnitude of water level extremes, both maxima and minima, in the future. The analysis is based on the outcome of circulation models RCO for 1961–2005 and RCA4-NEMO for 1961–2009 and water level recordings in 12 locations. The parameters of the GEV distributions for block maxima and minima over 12 months long time periods are evaluated using four different approaches for 367 coastal sectors along about 1400 km long coastal stretch of complicated shape and highly varying exposedness. An ensemble of 40 projections is developed to estimate water level maxima that occur once in 50 yr. The shape parameter of the GEV distribution for water level maxima varies considerably along the study area. Very high water levels in the eastern Gulf of Finland and eastern Gulf of Riga follow a Fréchet distribution and thus may rapidly increase even in a statistically stationary climate. A Gumbel or a 3-parameter Weibull distribution govern water level maxima in the rest of the study area and water level minima in the entire study area. The alongshore variation in the shape parameter can thus be a natural indicator of the potential increase in extremely large water levels. A Gumbel distribution serves as an acceptable substitute to the GEV distribution for water level maxima in most of study area, except for eastern bayheads. We show for the first time that extremely low water levels mostly follow a 3-parameter Weibull distribution. Substantial variability in estimates of parameters of the GEV distribution and extensive mismatch of these estimates using modelled and recorded water levels call for future research into physics and impact of local drivers on recorded water levels.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109267"},"PeriodicalIF":2.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Disentangling the effects of sandy beach management on intertidal macrobenthic fauna: A path analysis approach","authors":"Fabio Bozzeda ,&nbsp;Lucia Fanini ,&nbsp;Federica Costantini ,&nbsp;Barbara Mikac ,&nbsp;Marina Antonia Colangelo","doi":"10.1016/j.ecss.2025.109254","DOIUrl":"10.1016/j.ecss.2025.109254","url":null,"abstract":"<div><div>Sandy beaches are dynamic coastal ecosystems shaped by natural processes and human driven activities, hosting diverse macrobenthic communities that serve as key indicators of ecological health. This study examines the interplay between natural and anthropogenic drivers affecting these communities across five beaches along the Emilia Romagna coast, Italy. By employing path analysis, we quantified the direct and indirect effects of environmental variables, including sediment characteristics, physical processes, beach morphology, and management practices. Sampling was conducted at high and low tidal levels, analyzing 330 samples to assess community structure and diversity. Results reveal that both natural and human drivers significantly influence macrobenthic communities, with contrasting effects. Positive impacts were associated with beach nourishment, which increased habitat availability; while practices such as frequent mechanized cleaning and artificial dune construction negatively impacted diversity and abundance. Other drivers, including erosion and subsidence, exhibited complex relationships with species richness and community composition, highlighting the role of beach morphodynamics as a determinant of benthic diversity. Species-specific responses were observed, with the polychaete <em>Scolelepis (scolelepis) squamata</em> thriving in nourished environments, while <em>Polydora</em> sp. generally showed sensitivity to disturbance. The dominant bivalve <em>Lentidium mediterraneum</em> displayed neutral responses to management but was influenced by sediment properties. These findings emphasize the need for adaptive, ecologically sensitive beach management strategies that balance tourism demands with conservation goals. This study highlights the value of path analysis in unraveling complex ecological interactions, offering insights for the sustainable management of sandy beach ecosystems under increasing environmental and anthropogenic pressures. Future efforts should integrate these findings into broader frameworks addressing coastal resilience and biodiversity conservation.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109254"},"PeriodicalIF":2.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Parasitic fauna of the Manila clam (Ruditapes philippinarum): Insights, threats, and control measures – A review","authors":"S.D.N.K. Bathige ,&nbsp;Seung-Hyeon Kim ,&nbsp;Hyung-Bae Jeon ,&nbsp;Hyoun Joong Kim ,&nbsp;Kyung-Il Park","doi":"10.1016/j.ecss.2025.109263","DOIUrl":"10.1016/j.ecss.2025.109263","url":null,"abstract":"<div><div>The Manila clam (<em>Ruditapes philippinarum</em>) is a pivotal species in global aquaculture; however, it faces substantial challenges due to parasitic infections. This comprehensive review discusses the diverse fauna affecting Manila clam populations, including viruses, bacteria, protozoans, metazoans, arthropods, and annelid taxa. Additionally, this review elaborates on the pathogenicity, geographical distribution, diagnostic methods, and investigation periods associated with these parasites. Notably, although some pathogens, such as <em>Perkinsus olseni</em> and <em>Vibrio tapetis</em> are widespread across multiple countries, others exhibit more localized distributions. The identification of World Organization for Animal Health (WOAH)-designated pathogens, such as <em>P</em>. <em>olseni</em> highlights the severity of the threats posed to Manila clam aquaculture and ecosystem health. Moreover, parasites not listed by WOAH, such as <em>V</em>. <em>tapetis</em>, <em>Nymphonella tapetis</em>, <em>V</em>. <em>alginolyticus</em>, and <em>V</em>. <em>splendidus</em>, pose substantial threats to Manila clam health and aquaculture sustainability, necessitating a holistic approach to understanding host–parasite dynamics. Globalization, rising sea temperatures, and environmental factors exacerbate the risk of pathogen introduction and spread, underscoring the need for proactive measures. Pathogen monitoring, risk assessment, and the development of diagnostic technology are crucial for effective disease management. Strengthening legal frameworks and infrastructure is essential to bolster quarantine and epidemic prevention measures and to ensure the long-term sustainability of Manila clam aquaculture.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109263"},"PeriodicalIF":2.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time series satellite remote sensing reveals annual distribution, composition, and trajectory of tidal wetlands in the Yellow River Delta","authors":"Maoxiang Chang ,&nbsp;Peng Li ,&nbsp;Zhenhong Li ,&nbsp;Houjie Wang","doi":"10.1016/j.ecss.2025.109264","DOIUrl":"10.1016/j.ecss.2025.109264","url":null,"abstract":"<div><div>Tidal wetlands are vital ecological and economic bridges connecting terrestrial and marine ecosystems. Despite their importance, tidal wetlands face threats from human interference, biological invasion, unstable hydrology, and climate change, while remote sensing observations of them still face issues such as turbid water disturbance, limited datasets, and spectral similarity. As a result, detailed, long-term, and accurate annual mapping of tidal wetlands is often lacking globally, limiting the understanding and conservation of this important ecosystem. Taking the Yellow River Delta (YRD) as the studying site, we proposed an efficient and generalizable algorithm with Landsat images from 1985 to 2022 to systematically map the yearly tidal wetlands. The major components include tidal flats, dry flats, <em>Suaeda salsa</em>, <em>Tamarix chinensis</em>, <em>Phragmites australis</em>, artificial ponds and <em>Spartina alterniflora</em>. This algorithm effectively avoids interference from turbid water in tidal flat monitoring and spectral similarity in salt marsh monitoring while ensuring the reliability of image-based sample collection, achieving an average overall accuracy of over 92 %. The resultant 30-m spatial resolution map is the most comprehensive long-term observation of tidal wetlands to date, detailing their annual distribution and composition in the YRD. Furthermore, we investigated the evolution of the various components and subregions and found that the trajectory of tidal wetlands in the YRD exhibited six stages. This research aims to offer a robust solution for accurate tidal wetlands mapping and enhance our understanding of these ecosystems in turbid estuaries.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109264"},"PeriodicalIF":2.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Icelandic riverine freshwater distribution, offshore export, and alongshelf connectivity","authors":"Michael M. Whitney","doi":"10.1016/j.ecss.2025.109266","DOIUrl":"10.1016/j.ecss.2025.109266","url":null,"abstract":"<div><div>This study models Iceland's shelf and surrounding ocean waters to quantify shelf distributions, flushing times, offshore exports (beyond the 400-m isobath), and alongshelf transports of Iceland's riverine freshwater. Analysis of the 2019 period divides the shelf into four quadrants and follows river waters delivered to each quadrant with tracked freshwater tracers that decay over time in open-ocean waters. Tracked freshwater thicknesses are large in the southwest quadrant and near major rivers in other areas. Freshwater is present around the entire shelf, but is less prevalent in the southeast quadrant. Many river waters can reach halfway around Iceland before being exported offshore; diminishing amounts can almost entirely circumnavigate Iceland. Annual average freshwater flushing times have an approximately seasonal scale at around 3 and 4 months for eastern and western river waters, respectively. Annual average freshwater exports are larger from northern shelf quadrants than southern ones. Average alongshelf freshwater transports are downshelf. Alongshelf connectivity is strong between most quadrants and moderate between the eastern quadrants. Regressions show how export and downshelf transport increase during upwelling-favorable and downwelling-favorable winds, respectively. Results indicate the Icelandic Coastal Current has robust buoyancy signatures and connected currents in western Iceland, and has generally weaker buoyancy and less-pronounced connected flows on the eastern side.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"319 ","pages":"Article 109266"},"PeriodicalIF":2.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}