Estuarine Coastal and Shelf Science最新文献

{"title":"Effect of ecosystem stressors on biogeochemical processes and bivalve-mediated bioremediation approaches for estuary resilience","authors":"Saswati Deb ,&nbsp;Thomas Guyondet ,&nbsp;Michael R.S. Coffin ,&nbsp;Jeffrey Barrell ,&nbsp;Michael van den Heuvel","doi":"10.1016/j.ecss.2025.109441","DOIUrl":"10.1016/j.ecss.2025.109441","url":null,"abstract":"<div><div>Nutrient loading, derived from human-induced land-based activities, poses a significant risk of anthropogenic eutrophication in most estuaries worldwide and is considered a high-priority ecosystem stressor. Similarly, estuaries in the southern Gulf of Saint-Lawrence, Canada, are facing threats from this ecosystem stressor leading to potential nutrient over-enrichment, which not only affect primary production timing and abundance but can also alter the entire ecosystem dynamics. Determining the trophic condition of such estuaries becomes more critical when 58 % of the system is covered with natural populations of bivalve species. Therefore, we developed for the first time, a high-resolution 3-D coupled physical-biogeochemical model for the Bouctouche Estuary, Canada, based on Finite Volume Coastal Ocean Model and Integrated Compartment Model (FVCOM-ICM) whose water quality kinetics are further integrated with a benthic filter-feeder Dynamic Energy Budget (DEB) ecophysiological submodule to examine the present physical-biogeochemical condition, predict the responses of pelagic-benthic activity to different stages of nutrient loading and promote bivalve-mediated bioremediation approach. Results revealed that nutrient loading areas are characterized by low dissolved oxygen and biogeochemically distinct waters. Further, heterogeneity in estuarine biogeochemical processes is responding to water renewal time. Concomitantly, bivalves can bioextract about 11 % of riverine nitrogen inputs seasonally showing that both components can affect the net primary production distribution. Overall, this modeling framework will allow an ecosystem-based bioremediation approach for effective nutrient management to enhance estuary resilience.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109441"},"PeriodicalIF":2.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632763","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":"Growth and year-class dynamics of the Japanese silver pomfret Pampus punctatissimus: Correlation between salinity and recruitment","authors":"Yoshimi Ogino,&nbsp;Atsuko Yamaguchi","doi":"10.1016/j.ecss.2025.109440","DOIUrl":"10.1016/j.ecss.2025.109440","url":null,"abstract":"<div><div><em>Pampus punctatissimus</em> (Perciformes: Stromateidae) is a semi-anadromous fish that typically inhabits the continental shelf but depends on estuarine environments for reproduction. This species represents an important fishery resource in the Western Pacific. However, critical knowledge gaps remain regarding its population parameters and recruitment dynamics, which are crucial for its stock management. In this study, we aimed to investigate the longevity, growth, and year-class strength via otolith analysis of <em>P. punctatissimus</em> specimens collected from Ariake Bay—a key reproductive area for this species—and its surrounding waters. The validity of age estimation based on whole otoliths differed between sexes and was nearly completely invalid for males. The maximum observed age based on sectioned otoliths was 13 years, exceeding the previously reported maximum age for a congener by a factor of more than two. Growth exhibited significant sexual dimorphism: females reached 3.8 kg, whereas males reached 1.2 kg. Consequently, nearly all specimens weighing more than 1 kg were female. Year-class strength fluctuated significantly, revealing a recruitment failure in 2017. The back-calculated fish length revealed density-dependent growth during the first year of life, implying that stock abundance was limited by the size of nursery habitats. Variations in year-class strength were associated with salinity in the reproductive area, with higher salinity conditions inhibiting recruitment success. The study suggests salinity in reproductive areas as a key driver of recruitment variability in <em>P. punctatissimus</em>, underscoring the need to protect estuarine and nursery habitats for population sustainability.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109440"},"PeriodicalIF":2.6,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632764","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":"Ecological importance of middle intertidal mudflats for shorebirds on the west coast of Peninsular Malaysia","authors":"Mohd Ros Effendi ,&nbsp;Nur Munira Azman ,&nbsp;Mohammad Saiful Mansor","doi":"10.1016/j.ecss.2025.109437","DOIUrl":"10.1016/j.ecss.2025.109437","url":null,"abstract":"<div><div>The west coast of Peninsular Malaysia, within the East Asian–Australasian Flyway, is an important stopover site for migratory and passage shorebirds to refuel for their long journeys by taking advantage of seasonal fluctuations in food availability. Coastal areas, particularly intertidal zones and mudflats, are vital foraging grounds for shorebirds. However, their specific patterns of mudflat use along the west coast of Peninsular Malaysia remain poorly understood. This study examined the habitat preferences and foraging patterns of shorebirds in different intertidal mudflat zones by focusing on two coastal Important Bird and Biodiversity Areas – the North-Central Selangor Coast and Teluk Air Tawar-Kuala Muda Coast. The middle zone supported a high abundance of foraging shorebirds, suggesting a preference for this zone due to its optimal combination of intertidal areas, mudflats, and shallow water zones, being neither submerged for too long nor exposed to the sun for extended periods, and providing an optimal environment for invertebrates. Shorebirds were classified into spatial specialist, partial specialist, and generalist species, with five species specialising in the lower, middle, or upper mudflat zone. Some shorebird species, such as the Eurasian Curlew (<em>Numenius arquata</em>) and Ruddy Turnstone (<em>Arenaria interpres</em>), are considered tidal followers, as their ecological patterns were significantly influenced by the tidal cycle. The observed shorebird populations' preference for middle tidal flats, along with the presence of endangered species, such as Nordmann's Greenshank (<em>Tringa guttifer</em>), in this zone, highlights the critical importance of conserving mudflat habitats, particularly middle tidal flats, and underscore the need for detailed ecological insights in conservation planning.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109437"},"PeriodicalIF":2.6,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632765","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":"In situ diversity of the marine diatom genus Pseudo-nitzschia based on morphological characterisation","authors":"J. Arapov ,&nbsp;M. Bužančić ,&nbsp;S. Skejić ,&nbsp;J. Mandić ,&nbsp;T. Bonačić ,&nbsp;T. Tomašević ,&nbsp;Ž. Ninčević Gladan","doi":"10.1016/j.ecss.2025.109433","DOIUrl":"10.1016/j.ecss.2025.109433","url":null,"abstract":"<div><div>This study presents the first comprehensive analysis of the distribution, species composition, and morphology of the marine diatom genus <em>Pseudo-nitzschia</em> in four shellfish aquaculture areas along the Croatian coast. During the two-year period, <em>Pseudo-nitzschia</em> species were frequently occurring (96–100 %) across all areas, but their abundance remained generally low, except for two extreme bloom events in winter 2022. The abundance during the bloom reached 3.6 × 10⁶ cells L⁻¹ in Mali Ston Bay and 2.5 × 10⁶ cells L⁻¹ in Šibenik Bay, contributing up to 99 % of the phytoplankton community. A detailed species composition was analysed using Scanning Electron Microscopy in field samples. Eight <em>Pseudo-nitzschia</em> species were morphologically identified indicating the considerable diversity of this genus. Also high diversity was observed during bloom events. Multivariate analyses revealed significant spatial and seasonal variation in the <em>Pseudo-nitzschia</em> community structure. The Velebit Channel was characterised by higher frequency and contribution of <em>P. calliantha</em> and <em>P. mannii</em>, while in the other areas <em>P. delicatissima</em> complex, <em>P. pseudodelicatissima/cuspidata</em>, and <em>P. galaxiae</em> were more common and present throughout the year. Evident seasonality was observed for <em>P. calliantha</em> and <em>P. subfraudulenta</em> with winter-autumn annual peak associated with TIN and orthosilicates. Other species, such as <em>P. pseudodelicatissima/cuspidata</em> correspond to increase temperature and lower orthophosphates concentration, whereas the environmental factors mentioned exhibited the opposite effect on <em>P. delicatisima</em> complex and <em>P. galaxiae</em>.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109433"},"PeriodicalIF":2.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614205","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":"Spatial distribution of mangrove soil organic carbon in Indus Delta, Pakistan: A multi-sensor remote sensing and machine learning approach","authors":"Hammad Gilani ,&nbsp;Muddasir Shah ,&nbsp;Shahzada Sohail Ijaz ,&nbsp;Muhammad Asif ,&nbsp;Abid Nazir ,&nbsp;Niall P. Hanan","doi":"10.1016/j.ecss.2025.109435","DOIUrl":"10.1016/j.ecss.2025.109435","url":null,"abstract":"<div><div>Mangrove forests play a crucial role in carbon sequestration, especially in the coastal zones of arid regions where their ability to store carbon in soil is generally much higher than in terrestrial drylands. The Indus Delta in Pakistan is the world's largest arid mangrove forest system but lacks spatially explicit data on Soil Organic Carbon (SOC) despite its importance for conservation and carbon budgeting. This study aims to establish a baseline SOC map for 2020 at 10 m spatial resolution using Sentinel-1 (Synthetic Aperture Radar) and Sentinel-2 (MultiSpectral Instrument) satellite imagery, integrated with in-situ soil sampling. SOC predictions were made using a Classification and Regression Tree (CART) machine learning model within the Google Earth Engine platform, leveraging 40 predictor variables, including spectral bands and derived indices. A total of 53 topsoil (10 cm depth) samples were collected in February 2020 across the Indus Delta, and SOC was analyzed using the Walkley-Black method. The results showed an average SOC value of 67.59 ± 37.41 MgC ha⁻¹ (to 10 cm depth), and local values ranging from 15.07 to 138.04 MgC ha⁻¹. with a total of 0.91 PgC. The CART model demonstrated high accuracy, with an R² of 0.95 and an RMSE of 9.18 MgC ha⁻¹. However, the region faces challenges such as seawater intrusion and hypersalinity, which threaten its ability to sequester carbon. With the first high-resolution SOC map for the Indus Delta, this study provides valuable insights for ecosystem management, conservation planning, and carbon budgeting. These findings of this study have the potential to significantly influence initiatives like REDD+ and Blue Carbon projects, which aim to enhance carbon sequestration while addressing the ecological challenges facing Pakistan's mangroves.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109435"},"PeriodicalIF":2.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614204","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":"Seasonality and local nutrient loading drive changes in organic carbon in seagrass ecosystems in Hong Kong","authors":"Amrit Kumar Mishra ,&nbsp;Katie M. Watson ,&nbsp;Ho Tun Ng ,&nbsp;Man Zhao ,&nbsp;Chanaka Isuranga Premarathne Maha Ranvilage ,&nbsp;Dwi Wai Shan Jaimie ,&nbsp;Tse Cham Man ,&nbsp;Christelle Not ,&nbsp;Benoit Thibodeau ,&nbsp;Juan C. Astudillo ,&nbsp;Juan Diego Gaitán-Espitia","doi":"10.1016/j.ecss.2025.109427","DOIUrl":"10.1016/j.ecss.2025.109427","url":null,"abstract":"<div><div>Natural variation in environmental conditions (e.g., seasonality) modulates the ecological dynamics and functioning of seagrass ecosystems. However, these characteristics can be altered by anthropogenic-driven pressures resulting from coastal urbanization (e.g., nutrient pollution), with significant effects on ecosystem service provision, including carbon sequestration and storage. Understanding these effects is complex as seagrasses exhibit different sensitives to environmental stress and change, generating species-specific responses that vary through temporal and spatial scales. Here, we tested this hypothesis by quantifying the seasonal variation in total carbon (C%; upper sediment layer, 15 cm), total nitrogen (N%), and stable isotopes (δ¹³C and δ¹⁵N) in two seagrass species (i.e., <em>Halophila ovalis</em> and <em>H. beccarii</em>) in Hong Kong, one of the most urbanized coastal areas globally. The C:N ratios and δ¹⁵N values indicated seasonal differences in local nitrogen source and accumulation, resulting in increased total seagrass biomass in the wet season. Isotope results suggested belowground seagrass tissues significantly contributed towards sediment carbon, particularly in the wet season, characterized by increased nitrogen loading.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109427"},"PeriodicalIF":2.6,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571895","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":"Detection of coherent signals for river damming in shallow marine sediments along a 900-km inner shelf mud belt","authors":"Rick J. Yang ,&nbsp;James T. Liu ,&nbsp;Chih-Chieh Su ,&nbsp;Steven C. Chien ,&nbsp;Aijun Wang ,&nbsp;Zhijun Dai","doi":"10.1016/j.ecss.2025.109429","DOIUrl":"10.1016/j.ecss.2025.109429","url":null,"abstract":"<div><div>Continental shelf sediments serve as valuable archives of environmental changes within river basins, providing critical insights into the transfer of terrestrial materials to marine environments. In many major river systems worldwide, large-scale dam constructions have significantly reduced downstream sediment delivery. While previous studies have primarily focused on the impacts of such interventions on river channels and estuaries, highlighting effects such as reduced deltaic sedimentation rates and localized erosion. However, it remains uncertain whether these changes leave detectable stratigraphic signals in more distal regions of the continental shelf. This study investigates whether sedimentary changes associated with the commissioning of the Three Gorges Dam and the Shuikou Hydropower Station are recorded in the 900-km-long Zhejiang–Fujian Mud Belt, located offshore from the Changjiang River mouth. To evaluate the preservation of long-range signals of man-made activities, five dated sediment cores were analyzed using a suite of non-destructive proxies, including grain size, clay mineral assemblages, γ-density, magnetic susceptibility, and color reflectance. A total of 302 downcore measurements were subjected to Empirical Orthogonal Function (EOF) analysis. Distinct shifts in sediment characteristics were observed around the year 2002. The first EOF mode reflected sediment contributions from the Changjiang River, while the second captured inputs from the Minjiang River and other regional sources, indicating that signals of upstream anthropogenic disturbances can be retained even in distal shelf deposits. These findings suggest that continental shelf sedimentary records may preserve not only natural processes but also basin-wide human influences. This underscores the need for caution when using modern shelf records to reconstruct past environmental conditions, as recent anthropogenic imprints may obscure paleoenvironmental signals. By integrating stratigraphic records with multivariate statistical techniques, this study demonstrates here an effectively approach for assessing the influence of land-based activities on offshore sedimentary systems, offering a new perspective on human-induced changes in modern depositional environments.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109429"},"PeriodicalIF":2.6,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571883","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":"Maritime and lagoon beaches sediments mineral phases and potentially toxic elements characterization and evaluation of microplastics retention","authors":"Joana Fortunato ,&nbsp;Fernando Rocha ,&nbsp;Sara Fateixa ,&nbsp;Carla Candeias","doi":"10.1016/j.ecss.2025.109428","DOIUrl":"10.1016/j.ecss.2025.109428","url":null,"abstract":"<div><div>The present study aimed to characterize the texture, mineral phases, and geochemical composition of sixteen sediment samples of beaches in Portugal, from maritime and Ria de Aveiro lagoon environments. Additionally, the presence of Microplastics (MPs) in these sediments was estimated. Sediments from both environments were classified as sands, with a quartz content ranging ∼70–90 %. The physicochemical parameters showed neutral conditions, with pH between 6.16 and 7.05, typically of this type of setting. The concentration of As, Cr, and Zn was above sediment guidelines, suggesting anthropogenic contamination, particularly in one location, posing a risk to beach users. Contamination indices and toxicological assessment confirmed anthropogenic contamination, particularly by Cr on the maritime beaches, highlighting pollution and toxicity risk. This may be linked to industrial, domestic, and agricultural activities, population density, traffic, as well as traditional fishing practices. MPs were identified in both sediments and water samples from maritime and Ria de Aveiro beaches, ranging 38 to 958 MP/kg. The more abundant identified MPs were PUR, ABS, and PE, mainly in the form of fibers, with different colors.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109428"},"PeriodicalIF":2.6,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580930","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":"Dynamic changes in soil organic carbon and influencing factors in typical coastal reclaimed wetlands of China","authors":"Panlong Zhao ,&nbsp;Gaoru Zhu ,&nbsp;Chao Yu ,&nbsp;Min Xu ,&nbsp;Wenbin Yi ,&nbsp;Huiying Yu ,&nbsp;Yinghui Jiang ,&nbsp;Zhenglei Xie","doi":"10.1016/j.ecss.2025.109426","DOIUrl":"10.1016/j.ecss.2025.109426","url":null,"abstract":"<div><div>Coastal tidal wetlands are key blue carbon ecosystems with significant carbon sequestration capacity. Understanding the effects of tidal flat reclamation on soil organic carbon (SOC) and its components is essential for informing effective wetland management and policy. This study collected 96 surface soil and sediment samples from Dongtai City, Jiangsu Province, across various land use types, including un-reclaimed tidal flats (0 years) and reclamation sites with 10, 15, 25, 40, and 50 years of reclamation history. Results showed that SOC content generally increased with reclamation age, peaking at 8.92 g/kg after 25 years. While SOC content differences among post-reclamation land use types were not statistically significant, woodland exhibited the highest SOC levels (8.71 g/kg), highlighting its superior carbon sink potential. Additionally, contents of soil dissolved organic carbon (DOC), easily oxidizable organic carbon (EOC), and microbial biomass carbon (MBC) also increased over time. Among these, EOC exhibited the highest average content (1.59 g/kg) across the Dongtai reclamation area. Woodland consistently showed the highest active carbon component content levels (DOC: 4.14 mg/kg, EOC: 2.27 g/kg, MBC: 50.16 mg/kg). Land use type significantly influenced DOC and EOC contents but had no substantial effect on MBC. Environmental factors such as soil moisture, pH, and nitrogen input also impacted SOC dynamics. Notably, nitrogen addition significantly affected SOC and EOC levels in tidal flats and paddy fields, with less pronounced effects on DOC and MBC. These findings provide valuable insight into the long-term impacts of coastal land reclamation on soil carbon pools, with implications for sustainable land management. The study emphasizes the importance of prioritizing land uses with high carbon sink potential, such as woodland, and optimizing soil moisture, pH, and nutrient inputs to enhance carbon pool stability.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109426"},"PeriodicalIF":2.6,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144569974","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":"Decadal analysis of chlorophyll fluorescence, algal blooms and driving factors from a fixed-point observing system in the Northern Adriatic Sea","authors":"Simone Toller ,&nbsp;Francesco Riminucci ,&nbsp;Emanuele Böhm ,&nbsp;Lucilla Capotondi ,&nbsp;Annamaria Correggiari ,&nbsp;Chiara Lapucci ,&nbsp;Emanuele Organelli ,&nbsp;Mariangela Ravaioli ,&nbsp;Rosalia Santoleri ,&nbsp;Giuseppe Stanghellini ,&nbsp;Caterina Bergami","doi":"10.1016/j.ecss.2025.109423","DOIUrl":"10.1016/j.ecss.2025.109423","url":null,"abstract":"<div><div>From August 2012 to December 2022, continuous optical measurements of Chlorophyll Fluorescence (ChlF) were conducted at the E1 meteo-oceanographic buoy, a fixed-point observing system located off the Emilia-Romagna coast in the Northern Adriatic Sea (Italy, Mediterranean Sea). Using a WET Labs® ECO Triplet fluorescence sensor, a total of 69,705 hourly ChlF observations revealed significant seasonal and interannual variations in chlorophyll concentrations at the sea surface. ChlF concentrations ranged from below detection limits to a maximum daily average of 41 μg/L, with seasonal peaks during spring (April–June) and winter (January–March). Thanks to an automated detection procedure for algal bloom based on net growth rates and other parameters, it was possible to identify 40 bloom events over the ten years period. Principal Component Analysis (PCA) highlighted the influence of key environmental factors such as temperature, dissolved oxygen, turbidity, salinity, wind speed, as well as processes like nutrient transport and freshwater inputs, on Chl variability. Seasonal patterns emerged as primary drivers: spring blooms were dominated by temperature, salinity, and dissolved oxygen, summer typically featuresstratified conditions with sporadic bloom events, while autumn and winter blooms are more influenced by wind speed and turbidity, which promote nutrient redistribution and mixing. Moreover, the analysis of algal blooms identified two distinct seasonal patterns: Single – Peak blooms, predominant in spring, and Multi – Peak blooms, typical of autumn and winter, each defined by characteristic environmental conditions shaping onset, progression, and duration. These findings highlight the essential role of long-term data series in understanding coastal marine ecosystems and assessing the environmental factors driving algal bloom events.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"323 ","pages":"Article 109423"},"PeriodicalIF":2.6,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597113","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}