Estuarine Coastal and Shelf Science最新文献

{"title":"Impact of decadal climate change on Chlorophyll-a variability in sea surface temperature frontal zones of the Yellow Sea","authors":"Jing Yang ,&nbsp;Chunli Liu ,&nbsp;Qiwei Sun ,&nbsp;Yuntao Wang ,&nbsp;Qicheng Meng ,&nbsp;Lu Yang","doi":"10.1016/j.ecss.2025.109546","DOIUrl":"10.1016/j.ecss.2025.109546","url":null,"abstract":"<div><div>Oceanic fronts are ubiquitous phenomena that significantly influence marine hydrodynamics and ecology. Using satellite datasets, this study examines the seasonal and interannual variability of chlorophyll-<em>a</em> (Chl-<em>a</em>) concentration in the Shandong Peninsula Coastal Front (SP) and the Korean Peninsula Front (KP) from 2003 to 2021. On a seasonal scale, the Chl-<em>a</em> concentrations in the SP increased during winter and spring, attributed to enhanced deep mixing and upwelling, which increased nutrient availability for phytoplankton. In contrast, the higher Chl-<em>a</em> concentrations were observed during summer and autumn in the KP, mainly due to increased runoff bringing terrestrial nutrients to inshore waters, along with restricted horizontal nutrient exchange between offshore and inshore regions. On an interannual scale, variability in Chl-<em>a</em> concentrations exhibited similar spatial patterns across the SP, KP, and Yellow Sea. The findings also highlight the critical role of wind stress curl (WSC) in the interannual variability of Chl-<em>a</em> concentrations in the Yellow Sea. Positive WSC anomalies enhance upwelling, transporting more nutrients from the subsurface to surface waters, thereby increasing Chl-<em>a</em> concentrations. Additionally, asymmetric interannual variability was evident during La Niña events, with positive Chl-<em>a</em> anomalies in 2011 and negative anomalies in 2021. Further analysis reveals an increasing trend in Chl-<em>a</em> concentration from 2003 to 2011, followed by a decreasing trend from 2012 to 2021, driven primarily by Pacific Decadal Oscillation (PDO) by altering sea surface temperature (SST), wind, and nutrient availability. Changes in wind speed affected SST dynamics, influencing offshore Ekman transport and coastal upwelling. Variations in SST impacted vertical stratification, which in turn influenced nutrient diffusion and Chl-<em>a</em> concentration. This study enhances our understanding of the ecological environment in the marginal seas and provides a scientific basis for the characterizing physical-biogeochemical dynamics.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109546"},"PeriodicalIF":2.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158259","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":"Root decomposition in coastal wetlands of Southeast Queensland, Australia","authors":"Valerie Kwan ,&nbsp;Vicki Bennion ,&nbsp;Matthew A. Hayes ,&nbsp;Catherine E. Lovelock","doi":"10.1016/j.ecss.2025.109547","DOIUrl":"10.1016/j.ecss.2025.109547","url":null,"abstract":"<div><div>Root decomposition is a key coastal wetland ecological process. Despite this, there are limited empirical studies on root decomposition. In this study, we investigated the effect of species, root size and burial habitat on root decomposition of supratidal tree species (<em>Casuarina glauca</em>, <em>Melaleuca quinquenervia</em>), and intertidal mangrove (<em>Avicennia marina</em>) and saltmarsh species (<em>Sarcocornia quinqueflora</em>, <em>Sporobolus virginicus</em>) in Southeast Queensland, Australia. Decomposition curves for all tested factors indicated a plateau in remaining root mass by the end of the experiment; the plateau was therefore inferred to indicate the “expected liable fraction”. Root decomposition rates and fractions of expected labile root biomass of supratidal and intertidal species were not significantly different. The percentage mass remaining of fine roots (&lt;2 mm) of woody species varied by species, but that of coarse roots (2–20 mm) did not vary among species. Decomposition rates and expected labile fractions of roots of intertidal species were not significantly different between burial in the same habitat (“at home”) versus in habitats dominated by other species (“away”). Overall, we found lowest variation in percentage mass remaining, followed by expected labile fractions and root decomposition rates across species and habitats after 14 months. The mean root decomposition rate using two-pool asymptotic models was 0.0169 ± 0.0019 day⁻¹; the mean expected labile fraction was 28.3 ± 1.0 %. These experimental root decomposition results across the intertidal to supratidal zone provide insights to the drivers of decomposition rates in coastal wetlands that can be used in ecological models.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109547"},"PeriodicalIF":2.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158257","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":"Beach nourishment on low-energy coasts: Purpose and persistence (Puck Lagoon, Poland)","authors":"Patryk Sitkiewicz ,&nbsp;Damian Moskalewicz ,&nbsp;Paweł Tysiąc ,&nbsp;Paweł Burdziakowski ,&nbsp;Monika Michałek","doi":"10.1016/j.ecss.2025.109543","DOIUrl":"10.1016/j.ecss.2025.109543","url":null,"abstract":"<div><div>Low-energy coasts, though ecologically significant and highly sensitive to anthropogenic pressures, remain understudied with respect to artificial beach nourishment. This study examines the purpose, geomorphological effects, and persistence of beach nourishment interventions at two sites along the Puck Lagoon (Southern Baltic, Poland) – a semi-enclosed, sheltered low-energy coastal system of high ecological value exposed to intense tourism pressure. Using UAV-based morphological surveys, archival remote sensing data, and sediment analyses, we assessed beach changes over the two decades preceding nourishment and monitored post-nourishment evolution for two years. Results indicate an absence of erosion hazards; nourishment was therefore driven primarily by socio-economic and recreational interests rather than coastal protection needs. The natural beaches were narrow and heterogeneous, composed of cobbles, wrack, driftwood, and vegetation within a Natura 2000 site. Nourishment replaced these with relatively homogeneous fine-to medium-grained sand, even finer than the natural deposits. Initial morphodynamics in Rewa corrected design shortcomings by eroding the lower beach and infilling the nearshore. Over two years of monitoring, no significant shoreline retreat or volumetric losses were detected. In both sites, morphodynamics remained weak, merely reflecting pre-nourishment patterns. Our findings demonstrate that, on extremely low-energy coasts, nourishment effects can persist for several years without recurrent interventions. We propose a decision-making framework integrating geomorphological, ecological, and socio-economic criteria to guide sustainable nourishment planning in similar environments. These results have management implications for Integrated Coastal Zone Management in sheltered lagoonal systems worldwide, highlighting the necessity of rigorous need assessment, long-term monitoring, and ecosystem service valuation.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109543"},"PeriodicalIF":2.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118079","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":"Vertical dynamics of suspended particulate matter and chlorophyll-a in a well-mixed coastal turbid system","authors":"Saumya Silori ,&nbsp;Xavier Desmit ,&nbsp;Rolf Riethmüller ,&nbsp;Markus Schartau ,&nbsp;Nathan Terseleer ,&nbsp;Michael Fettweis","doi":"10.1016/j.ecss.2025.109545","DOIUrl":"10.1016/j.ecss.2025.109545","url":null,"abstract":"<div><div>The particulate organic carbon (POC) content of suspended particulate matter (SPM) gradually increases along a horizontal gradient from high-turbidity to low-turbidity waters, reflecting a characteristic feature of SPM dynamics. Here, we investigate whether this gradual POC enrichment is also evident in the vertical in a turbid, shallow, well-mixed water column (MOW1), where variation in hydrodynamic forcing and phytoplankton production is likely to differ markedly from the cross-shore transects. Combining SPM, POC, and chlorophyll-<em>a</em> (Chl<em>a</em>) data collected from surface and bottom layers at MOW1 during multiple tidal cycles between 2019 and 2022, we observe relatively higher POC and Chl<em>a</em> content in surface waters, beginning in spring. During this season we observe a larger uncertainty in the Chl<em>a</em>-SPM regression analysis, indicating a weaker association between the two, which contrasts winter conditions where the association is better. Monthly vertical profiles of SPM, constructed using optical backscattering sensor data, and Chl<em>a</em> profiles from water sample data indicate that a significant fraction of phytoplankton is floc-attached and that free phytoplankton type predominates only during the growing period. Our findings suggest that, similar to the horizontal gradients in POC content of SPM, differential settling amongst various components of SPM seems to contribute to the compositional gradient within the vertical water column. Consequently, free phytoplankton cells may be able to prolong residence in the photic depths, particularly advantageous during the early stages of phytoplankton blooms when SPM concentrations remain high.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109545"},"PeriodicalIF":2.6,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109513","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":"Abundance and distribution of microplastics on sandy beaches of remote islands of Okinawa, southern Japan","authors":"Ifenna Ilechukwu ,&nbsp;Chloé Julie Loïs Fourreau ,&nbsp;Mackenzie Stoeltje ,&nbsp;Edith Conn ,&nbsp;Yusuke Iwaki ,&nbsp;James Davis Reimer","doi":"10.1016/j.ecss.2025.109538","DOIUrl":"10.1016/j.ecss.2025.109538","url":null,"abstract":"<div><div>Microplastic levels of remote islands and regions often receive less attention than levels in urban and more accessible areas. This study investigated the abundance and typology of microplastics on beach sediments of four remote islands (Iriomote, Aka, Sesoko, Kouri) in Okinawa in southern Japan. Overall, microplastic concentrations in beach sediments in these remote islands ranged from 116.67 ± 0.75 particles/kg sediment to 522.22 ± 157.62 particles/kg across the islands. Concentrations at six beaches around Iriomote Island ranged from 213.33 ± 100.10 to 446.67 ± 267.39 particles/kg sediment, while concentrations in four Aka Island beach sediments were from 240.80 ± 88.88 to 522.22 ± 157.62 particles/kg. Concentrations in beach sediments of Sesoko and Kouri islands were 300 ± 41.23 and 116.67 ± 15.06 particles/kg sediments, respectively. Microplastic morphology and polymers detected with Raman spectroscopy were dominated by fibers and polyethylene, respectively, while the most abundant size was &lt; 1 mm microplastic at all beaches. Pollution indices revealed a low level of microplastic pollution on these sandy beaches, providing baseline data for future assessments of microplastic pollution in other sandy beaches around remote islands in the East China Sea. We recommend migration to washing machines with filters, as well as adequate management of solid wastes in municipalities and harbours in order to reduce microplastic pollution of coastal areas in remote islands.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109538"},"PeriodicalIF":2.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106014","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":"Applications of machine learning algorithms to a sandy beaches ecological database: an empirical and critical comparison","authors":"Isidoros Iakovidis ,&nbsp;Fabio Bozzeda","doi":"10.1016/j.ecss.2025.109539","DOIUrl":"10.1016/j.ecss.2025.109539","url":null,"abstract":"","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109539"},"PeriodicalIF":2.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106074","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":"A small increase in temperature could rapidly expand the latitudinal range and pathogenicity of the marine trematode parasite Curtuteria arguinae","authors":"Leslie Stout ,&nbsp;Itsaso Lopez-Ahedo ,&nbsp;Guillemine Daffe ,&nbsp;Aurélie Chambouvet ,&nbsp;Xavier de Montaudouin","doi":"10.1016/j.ecss.2025.109541","DOIUrl":"10.1016/j.ecss.2025.109541","url":null,"abstract":"<div><div>The phenology and transmission dynamics of the marine trematode <em>Curtuteria arguinae</em> were investigated, a parasite whose recently elucidated life cycle involves oystercatchers (<em>Haematopus ostralegus</em>), needle snails (<em>Bittium reticulatum</em>), and edible cockles (<em>Cerastoderma edule</em>). To assess the influence of temperature and light on cercarial emergence, infected <em>B. reticulatum</em> were exposed to temperatures ranging from 15 °C to 27 °C under both light and dark conditions. Cercarial emergence peaked under warm and illuminated conditions, showing strong temperature dependence, and, to a lesser extent, light dependence. Emergence occurred significantly at temperatures ≥21 °C, with median emergence rates of 12–47 cercariae.day⁻¹, and the positive influence of light was overruled at higher temperatures. A 22-year dataset from Arcachon Bay (France) was also analyzed to determine the timing of first infections in cockles relative to sea and air temperatures, as well as cockle shell size, across ten cohorts. First infections of cockles were consistently observed in late summer, with a mean sea temperature of 20.8 °C, placing cercarial transmission once a thermal threshold is reached. This thermal dependency explains the parasite's current southern distribution. With climate warming, its range is likely to expand northward along the northeastern Atlantic coast, in areas where all hosts are already present. Expansion may also be supported by the northward extension of <em>B. reticulatum</em>. In areas where the parasite is already established, rising temperatures may enhance cercarial output and infection intensity, increasing pathogenic effects on both intermediate hosts and posing a growing threat to ecosystem functioning and cockle fisheries.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109541"},"PeriodicalIF":2.6,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158258","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":"Climate change-driven coastal flooding in the Mid Adriatic Sea and adaptation of coastal defense structures","authors":"Agnese Baldoni ,&nbsp;Francesco Marini ,&nbsp;Giorgio Filomena ,&nbsp;Stefano Parlani ,&nbsp;Maurizio Brocchini","doi":"10.1016/j.ecss.2025.109535","DOIUrl":"10.1016/j.ecss.2025.109535","url":null,"abstract":"<div><div>The Adriatic Sea is highly impacted by rising sea levels and increasingly frequent extreme events due to climate change consequences. This work aims at evaluating coastal flooding caused by future extreme sea storms for five test sites along the Marche Region coast (Italy). Projections of water levels and waves to 2070, under the very high emission scenario identified by the IPCC, were used to force a modeling chain that provided the inundation extent and the water depths in the flooded areas. To define the joint probability of wave height and period, accounting for their mutual dependence, a bivariate extreme value analysis was performed. An extreme pair of wave height-peak period was computed through a copula approach that better allows to understand the correlation between wave energy and storm dynamics compared to univariate methods. Regardless of the analyzed site, coastal flooding affects all the beaches and summer facilities and extends hundred of meters inland, interesting also urban areas and strategic infrastructures. The extension of the flooding increases with increasing return periods, showing the consequences of medium-to-low probability extreme events, projected to occur once in a year by the end of the century. To face such situation, coastal defense structures need to be adapted, carefully selecting the best adaptation option to undertake. While for emerged breakwaters increasing their height always results in a reduced flooding, for submerged barriers a negative effect occurs when the freeboard approaches zero: even if the wave transmission is reduced, a large piling-up generates in the protected area, enlarging the inundation extent, as shown by numerical results.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109535"},"PeriodicalIF":2.6,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106015","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":"Reconstructing past tidal currents: A numerical approach to the paleotides of northern Patagonia","authors":"Guadalupe Alonso ,&nbsp;Walter César Dragani ,&nbsp;Federico Ignacio Isla","doi":"10.1016/j.ecss.2025.109536","DOIUrl":"10.1016/j.ecss.2025.109536","url":null,"abstract":"<div><div>This study presents a two-dimensional, depth-averaged hydrodynamic model designed to simulate paleotidal conditions in the northern Patagonian coastal region around 11.5 radiocarbon thousand years before present (11.5 ¹⁴C kyr BP), which corresponds approximately to 13 calibrated thousand years before present (cal kyr BP), representing a scenario prior to the flooding of San Matías Gulf. To reconstruct paleo-bathymetry, the mean sea level was lowered by 50 m relative to present conditions and the tidal-generating potential was maintained. The model is forced by present-day M₂ tidal constituent—the dominant component in the area—applied at the open boundaries. Results reveal that tidal currents during the late Holocene were considerably more intense than today, particularly in the central sector of the San Matías Gulf outlet. The simulated flow directions align with the orientation of the ancient coastline, and a convergence/divergence zone identified near 41.5°S, 61.5°W is interpreted as a coastal paleo-amphidromic point, where tidal wave rotation was restricted by shoreline geometry. The work also addresses a long-standing question regarding the origin of submerged gravel dunes at the southern entrance of the gulf. Simulation results indicate that present-day tidal currents are insufficient to mobilize such coarse sediment, suggesting that these features formed under different conditions—possibly during a transitional phase when the gulf was a dry basin being flooded by rising sea level. These findings provide new insight into the paleo-hydrodynamics of the region and contribute to the understanding of sedimentary processes linked to sea-level changes.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109536"},"PeriodicalIF":2.6,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106072","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":"Effect of gillnet mesh size on catch efficiency and bycatch in the Greenlandic lumpfish (Cyclopterus lumpus) fishery","authors":"Malthe Kjølhede Ahlmann Olesen ,&nbsp;Bent Herrmann ,&nbsp;Rikke Petri Frandsen ,&nbsp;Flemming R. Merkel ,&nbsp;Cas Van Der Kaaden ,&nbsp;Søren Post","doi":"10.1016/j.ecss.2025.109534","DOIUrl":"10.1016/j.ecss.2025.109534","url":null,"abstract":"<div><div>The Greenlandic lumpfish (<em>Cyclopterus lumpus</em>) fishery is among the largest lumpfish fisheries in the world and serves as an important source of income for many local small-scale fishers. The fishery primarily targets females for their highly valued roe, using gillnets deployed from smaller vessels. However, challenges with unwanted bycatches raise concerns about the sustainability of the fishery. This study examines the impact of three different gillnet mesh sizes on the catch efficiency of lumpfish and non-target species. Results demonstrate that reducing the mesh size from the currently regulated 135 mm–120 mm (half mesh) can increase the catch probability of female lumpfish by 32 % while the capture for male lumpfish was estimated to increase by 240 %. Conversely, increasing the mesh size to 150 mm (half mesh) reduces female lumpfish catches by 70 % and 94 % for males respectively. The species composition was not affected to the same extent by changing mesh size. Despite the increased catch efficiency of lumpfish with smaller mesh sizes, the potential for higher seabird bycatch remains a significant concern, preventing recommendations for regulatory changes based on the current data.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"326 ","pages":"Article 109534"},"PeriodicalIF":2.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004813","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}