Continental Shelf Research最新文献

{"title":"A taxonomic approach to discriminating the ecological quality status under salinity stress in marine ecosystems using protozoa","authors":"Qiaoling Wang,&nbsp;Awais Ali,&nbsp;Henglong Xu","doi":"10.1016/j.csr.2025.105636","DOIUrl":"10.1016/j.csr.2025.105636","url":null,"abstract":"<div><div>Due to special statistical property, taxonomic distinctness has proved to be a powerful tool for discriminating ecological quality status. This article combines the taxonomic difference index with protozoa. To evaluate effects of salinity stress on ecological quality of marine ecosystems, periphytic protozoa, as test organisms, were exposed to a salinity gradient of 9, 19, 29 (control), 39 and 49 in temperature-controlled circulation systems (TCCSs) during 21 days. The changes of taxonomic distinctness measures of the test protozoa were detected along the salinity gradient. The taxonomic hierarchy of the test protozoa was significantly shifted with salinity changes compared to the control (29). The average taxonomic distinctness (<em>Δ</em>⁺) and variation in taxonomic distinctness (<em>Λ</em>⁺) were significantly dropped under salinity altering by 20. It suggests that the taxonomic distinctness of protozoa may serve as a robust bioindicator for evaluating the ecological quality of marine ecosystems under global salinity stress.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105636"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928054","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":"Response of high-resolution heavy metals records to human activities after considering the influence of early diagenesis in the East China Sea over the last 70 years","authors":"Xiaolin Ren ,&nbsp;Dejiang Fan ,&nbsp;Judong Mao ,&nbsp;Peng Cheng ,&nbsp;Xin Zhang ,&nbsp;Xueshi Sun","doi":"10.1016/j.csr.2026.105638","DOIUrl":"10.1016/j.csr.2026.105638","url":null,"abstract":"<div><div>The records of heavy metals in sediments have been widely used as an indicator for reconstructing human activities, whereas whether early diagenesis influenced the heavy metal records remained uncertain. This study was based on the collection of sediment core from the East China Sea to identify the influence of early diagenesis on heavy metals in sediments through a contrast of heavy metals in sediments (HM_sed) and porewater (HM_pw), to explore the response of the heavy metal records to human activities in the last hundred years. The results demonstrated that the physicochemical conditions (grain size, Eh, pH) of the core were relatively stable and that HM_pw were primarily influenced by the degradation of organic matter and the reduction of iron (Fe) and manganese (Mn) oxides. The comparison between HM_pw and HM_sed indicated that the exchange of heavy metals between sediments and porewater was insignificant to HM_sed. The linear regression of aluminum (Al) to heavy metals (zinc, arsenic, and lead) allowed for the quantitative distinction of the contributions of natural and anthropogenic sources. Since 1950, anthropogenic heavy metals have increased rapidly, with significant phased changes. They are closely related to the percentage of secondary industry value in GDP. This study demonstrates that early diagenesis has a negligible effect on HM_sed and the secondary industry percentage is a comprehensive indicator to reflect anthropogenic heavy metals’ release.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105638"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928052","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":"High-resolution tidal harmonic reconstruction in the South China sea using ENOPF and a 2D adjoint tidal model","authors":"Yibo Zhang ,&nbsp;Xiaojiang Zhang ,&nbsp;Kaijun Ren ,&nbsp;Huizan Wang ,&nbsp;Weimin Zhang ,&nbsp;Xianqing Lv","doi":"10.1016/j.csr.2026.105645","DOIUrl":"10.1016/j.csr.2026.105645","url":null,"abstract":"<div><div>Accurate reconstruction of tidal harmonic constants in complex marginal seas like the South China Sea (SCS) is critical for understanding regional tidal dynamics and improving coastal ocean forecasting. This study integrates the two-dimensional (2D) adjoint tidal model with the Equidistant Nodes Orthogonal Polynomial Fitting (ENOPF) method to reconstruct high-resolution gridded tidal harmonic constants for four tidal constituents—N₂, K₂, P₁, and Q₁—across the SCS. The study region is divided into five sub-areas, with ENOPF applied in the central basin and a combination of model assimilation and polynomial fitting used in coastal regions. To address discontinuities at subregional boundaries, four smoothing techniques—Savitzky-Golay filter, Gaussian filter, Bilateral filter, and linear distance weighting—are tested. Results show that the linear distance weighting provides the reasonable cotidal charts while maintaining data fidelity, which is selected for final implementation. The reconstructed results are validated against satellite altimetry (X-TRACK) and tide gauge observations, and benchmarked against six global tidal models, including TPXO10, FES2022, and EOT20, etc. Across all constituents, the reconstruction demonstrates superior or comparable accuracy in both amplitude and phase lag, particularly in coastal areas. This study provides an effective and scalable approach for high-precision tidal reconstruction in marginal seas, with implications for operational oceanography, coastal management, and regional climate studies.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105645"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023416","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":"Seawater flow attenuation by structurally complex kelp forests in a high-latitude fjord","authors":"Klaudia Kosek ,&nbsp;Wojciech Artichowicz ,&nbsp;Piotr Balazy ,&nbsp;Bernabé Moreno ,&nbsp;Maciej Chelchowski ,&nbsp;Piotr Kuklinski","doi":"10.1016/j.csr.2026.105646","DOIUrl":"10.1016/j.csr.2026.105646","url":null,"abstract":"<div><div>Kelp forests are integral components of coastal marine ecosystems, significantly enhancing biodiversity, productivity and stability. With their large and complex canopy structures, which often occur in dense groups, they are able to physically modify their surroundings (e.g., flow velocity of currents, chemical composition of water), though the extent of this influence is not fully understood. The primary objective of this investigation was to examine the impact of kelp forests on seawater currents in the rapidly changing Arctic coastal ecosystem. The studied kelp forests along Isfjorden (Spitsbergen, 78° N) were predominantly composed of <em>Alaria esculenta</em>, <em>Saccharina latissima</em> and <em>Laminaria digitata</em>, with an average density of 58.9 ± 18.6 ind/m² and maximum length of individuals up to 206 cm (<em>S. latissima</em>). Through comprehensive analysis of currents velocity, direction and tidal patterns, significant reductions in flow velocities were observed within kelp forests compared to nearby kelp-free areas. Notably, at a depth of 7 m, mean flow speeds varied from 9.89 cm/s at locations with no kelp forest to 3.03 cm/s at locations with dense kelp forest, indicating distinct differences in flow dynamics. This study quantifies the impact of kelp forest composed of above-mentioned species on seawater currents, showing that aggregations of these morphologies generate microhabitats with distinct flow regimes. This knowledge is essential especially for the Arctic, enabling prediction of coastal ecosystem responses to rapid environmental changes and managing potential impacts on biodiversity and ecosystem functioning.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105646"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023415","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":"Rates and pathways of organic matter remineralisation in different sedimentary environments of the Helgoland Mud Area, North Sea","authors":"Daniel Müller ,&nbsp;Bo Liu ,&nbsp;Moritz Holtappels ,&nbsp;Walter Geibert ,&nbsp;Susann Henkel ,&nbsp;Sabine Kasten","doi":"10.1016/j.csr.2025.105632","DOIUrl":"10.1016/j.csr.2025.105632","url":null,"abstract":"<div><div>Coastal and shelf-sea sediments are hotspots for organic carbon (OC) remineralisation and burial. Using high-resolution solid-phase and pore-water data and diagenetic modelling, we investigated and quantified early diagenetic processes within sediments of the Helgoland Mud Area, SE German Bight. This included assessing the effects of bottom trawling and dumping of harbour sediments on rates and pathways of OC remineralisation. Our results show that aerobic respiration is the most important pathway of OC remineralisation, followed by sulphate reduction. Surprisingly, we observed no effect of different depositional and geochemical environments on the relative contribution of the different pathways of OC remineralisation in large parts of the study area, despite the wide range of mud contents, sedimentation rates, benthic OC fluxes and average reactivities of the OC reaching the sediment-water interface. This observation indicates that either (1) the variations within these parameters do not significantly influence the relative contribution of aerobic and anaerobic processes, or (2) the differences in these parameters are too insignificant to affect the contribution of the pathways. Exceptions are intensive bottom trawling, resulting in a lower contribution of aerobic respiration, enhanced sulphate reduction and higher overall OC remineralisation, and dumping of harbour sediments showing 7 to 12 times lower OC contents compared to harbour sediments and hence low OC remineralisation rates. This indicates a significant impact of benthic and pelagic remineralisation and ultimately CO₂ formation during dredging and dumping of harbour sediments.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105632"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928053","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":"Distribution, aggregation and feeding habit promote coexistence among four sympatric species of stomatopods living in tropical mud substrates","authors":"Ying Pei Ng ,&nbsp;Ving Ching Chong ,&nbsp;Peter K.L. Ng","doi":"10.1016/j.csr.2025.105634","DOIUrl":"10.1016/j.csr.2025.105634","url":null,"abstract":"<div><div>Burrowing stomatopods or mantis shrimps, that live on subtidal soft substrates are poorly studied in mangrove-mudflat ecosystems, as in Matang (Malaysia), a major feeding and nursery area for penaeid shrimps and fishes. Since stomatopods are known to be variably predacious, sedentary, territorial, and sometimes gregarious, it is of interest to study how sympatric species live and coexist in such substrates, including their trophic requirements. Bottom trawl samplings in Matang waters over 18 months revealed four species of squillid stomatopods: <em>Clorodopsis scorpio</em> in estuaries, <em>Miyakella nepa</em> and <em>Oratosquillina perpensa</em> in inshore waters, and <em>Harpiosquilla raphidea</em> in offshore waters. Their consistent size ranges and means across nearshore and offshore habitats showed no clear indication of ontogenetic migration. All species display contagious distributions with higher intraspecific than interspecific aggregation, fulfilling the coexistence criterion. Relative prey taxa consumptions are quite similar among conspecifics but vary among heterospecifics. Penaeid shrimp is the main prey for all species except <em>H. raphidea</em>. It is an abundant resource that acts as a hedge against possible prey shortage, allowing prey specialization in <em>H. raphidea</em> (fish feeder), plausibly in <em>C. scorpio</em> (shrimp feeder), and alternative prey choices for <em>M. nepa</em> and <em>O. perpensa</em> (shelled mollusc and crab feeders). The study's findings, despite the methodological constraints, have important implications for fishery management and habitat conservation in that stomatopods and penaeid shrimps are commercially exploited, the former depend on the latter as food, and the latter depend on coastal mangroves and mudflats as nursery areas.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105634"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928152","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":"Is there biologically-facilitated transfer of billions to trillions of microplastics between oceans in the tissues of the European anchovy?","authors":"Francois Bothma ,&nbsp;Ryan Uren ,&nbsp;Carl D. van der Lingen ,&nbsp;Laura Simon-Sánchez ,&nbsp;Lucian Iordachescu ,&nbsp;Hindrik Bouwman","doi":"10.1016/j.csr.2026.105650","DOIUrl":"10.1016/j.csr.2026.105650","url":null,"abstract":"<div><div>There is a paucity of comparative microplastic (MP) data in fish between adjacent oceans. We analysed MPs in muscle tissue of the European anchovy <em>Engraulis encrasicolus</em> from the South Atlantic Ocean (SAO) and Indian Ocean (IO) off the South African coast (n = 58 and n = 45, respectively). SAO anchovy had a significantly higher MP concentration than IO anchovy (1.4 and 0.58 n/g, respectively), with no discernible differences between oceans in MP dimensions or colour compositional proportions. SAO anchovy were younger, smaller (6.5 g), and filter feeding. Migrating toward the IO, they grow larger (7.2 g) and switch to selective feeding, partially accounting for lower MP concentrations. Due to this ontogenetic diet shift, anchovy may not be the best indicator of oceanic concentrations of MPs without accounting for their biology. Based on this ontogenetic diet shift and knowledge of stocks and movement, we estimate that between 460 billion to 2.8 trillion MPs (equivalent to 20.6 – 223 kg) could be transported within the tissues of the anchovy from the SAO to the IO. Our findings underscore the need to incorporate biology when interpreting biota as MP indicators. This study highlights a possible and previously unrecognised biologically-facilitated transport of MPs between oceans, a phenomenon requiring further study for confirmation.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105650"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173735","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":"Phytoplankton community structure and harmful species in a North African coastal lagoon: the case of Moulay Bousselham, (Moroccan Atlantic)","authors":"Asia Ben Haddouch ,&nbsp;Karima Chaira ,&nbsp;Mohammed Loutfi ,&nbsp;Samir Benbrahim ,&nbsp;Benlahcen Rijal-Leblad ,&nbsp;Mohamed Laabir","doi":"10.1016/j.csr.2025.105635","DOIUrl":"10.1016/j.csr.2025.105635","url":null,"abstract":"<div><div>Phytoplankton is a reliable bioindicator for assessing water quality in aquatic environments. Research on phytoplankton in African coastal ecosystems, remains limited especially concerning toxic phytoplankton species and the accumulation of their associated toxins in mollusks. The Moulay Bousselham Lagoon is one of Morocco's most significant wetlands and ecologically protected areas, designated under the Ramsar convention. Its strategic location, connected to the African Atlantic Ocean, supports a rich and diverse assemblage of flora and fauna. A phytoplankton survey conducted from March 2015 to March 2016 at five sampling sites within the lagoon revealed a dominance of diatoms, followed by dinoflagellates. Among the 49 taxa identified, 47 % of dinoflagellates and 7 % of diatoms were potentially harmful. Dinoflagellates were most abundant during the summer months (June and July 2015), particularly at the lagoon's mouth (the Passe), with species of the genus <em>Scrippsiella</em> being especially abundant. Their presence declined progressively from downstream (the Passe) to upstream areas (Lâacha). In contrast, diatoms dominated in winter and spring and included <em>Chaetoceros</em>, <em>Coscinodiscus</em>, <em>Rhizosolenia</em>, <em>Pseudo-nitzschia</em>, and <em>Nitzschia</em>. During summer and autumn, dinoflagellates such as <em>Ceratium</em>, <em>Scrippsiella</em> and <em>Prorocentrum</em> became more abundant. It seems that the observed succession between diatoms and dinoflagellates may be influenced by seasonal changes in physicochemical parameters and freshwater inputs considering the differences in downstream and upstream stations. Throughout the study period, analysis of marine biotoxins in shellfish collected from the lagoon revealed no contamination by amnesic or paralytic shellfish toxins. However, lipophilic shellfish toxins were detected on a single occasion in farmed mussels at the Palmier site. The seasonal dynamics and spatial distribution of potentially harmful phytoplankton in the Moulay Bousselham Lagoon highlight the need for integrated coastal management strategies in this lagoon, particularly in monitoring toxic species and mitigating risks related to shellfish contamination.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105635"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928154","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":"On the impact of closure depth estimation methods on shoreline predictions","authors":"Connor J. Durkin ,&nbsp;Avidesh Seenath ,&nbsp;Michiel A.F. Knaapen","doi":"10.1016/j.csr.2026.105648","DOIUrl":"10.1016/j.csr.2026.105648","url":null,"abstract":"<div><div>The depth of closure (<span><math><mrow><mi>D</mi><mi>o</mi><mi>C</mi></mrow></math></span>) acts as a morphodynamic boundary in hybrid 2D/one-line shoreline models. Although theoretically important, its actual influence on shoreline prediction accuracy in these models, which are increasingly used to inform coastal management, remains uncertain. Moreover, the optimal method for estimating and specifying the <span><math><mrow><mi>D</mi><mi>o</mi><mi>C</mi></mrow></math></span> in such models is still unresolved. To address this, we use an advanced hybrid 2D/one-line model – MIKE21 – to evaluate the impact of commonly applied <span><math><mrow><mi>D</mi><mi>o</mi><mi>C</mi></mrow></math></span> estimation equations on short-term (<em>micro</em> timescale) shoreline predictions at two morphologically different sandy coastal systems, one each in New York (NY) and Southern California (SC). We find that shoreline prediction accuracy in NY remains consistent (∼1.0 m MAE; ∼1.2 m RMSE) under alternative <span><math><mrow><mi>D</mi><mi>o</mi><mi>C</mi></mrow></math></span> estimation methods, while there are marginal differences in SC (∼25–26 m MAE; ∼32–34 m RMSE). These results suggest that the <span><math><mrow><mi>D</mi><mi>o</mi><mi>C</mi></mrow></math></span> may not be a critical parameter in hybrid 2D/one-line models, contrary to its <em>theoretical</em> importance. We discuss the wider implications of this finding and what it means for continued hybrid 2D/one-line shoreline modelling.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105648"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173736","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":"Magnetic mineralogical and sedimentological approach for tracing source-to-sink processes in a tropical fluvial, estuarine, and marine system","authors":"Firoz Badesab ,&nbsp;Nitin Kadam ,&nbsp;Prashila Pednekar ,&nbsp;Shazia Shaheen ,&nbsp;Omkar Sagavekar ,&nbsp;Sriram Gullapalli ,&nbsp;Mamilla Venkateshwarlu ,&nbsp;T. Vijaya Kumar ,&nbsp;A.V. Satyakumar ,&nbsp;K. Mohan ,&nbsp;Virsen Gaikwad ,&nbsp;Satish J. Sangode ,&nbsp;Shubham Waghmare ,&nbsp;Anish Varma ,&nbsp;E.V.S.S.K. Babu ,&nbsp;Sakshi Raikar","doi":"10.1016/j.csr.2025.105630","DOIUrl":"10.1016/j.csr.2025.105630","url":null,"abstract":"<div><div>Magnetic minerals are ubiquitous in estuarine, coastal, and shelf systems and potential recorders of geological, climatic and sedimentary processes. Sediments in the tropical sedimentary system of Goa have been extensively studied to reconstruct the paleoenvironment changes, sedimentation, and diagenetic history. However, a dedicated source-to-sink analysis of sediments delivered to the Arabian Sea (off Goa, India) using a magnetic and sedimentological approach was so far lacking. Such analysis is crucial for the development of environmental magnetism based mineralogical proxies. The present study sets out to identify environmental fingerprints of magnetic minerals originating from diverse sources and depositional environments, and assess their relative magnetic contribution to the bedload sediments in a complex tropical estuarine and marine shelf system of Goa, India. Compilation of magnetic and grain size properties of catchment rocks, riverbank soils, and bedload (fluvial, estuarine, marine) sediments of Goa, India showed large variations in the composition of magnetic mineral and distribution pattern. A clear N-S magnetic contrast in estuaries of Goa, India showing a decline in ferrimagnetic minerals content, followed by subsequent increase in high coercivity minerals and volume of coarser clastic size sediments suggest a marked change in sediment provenance. Grain size distribution of the studied estuarine sediments revealed two distinct patterns, which seems to be controlled by contrasting sediment provenance, changing detrital input, riverine morphology, and hydro-and sediment dynamics. A noticeable source-to-sink trend of loss of fluvial-derived fine silt-size bedload sediments and selective retention of coarser sediments within the south Goa estuaries can be reconciled with the efficient sediment partitioning regime driven by regional hydrodynamics, which restricted the settling of finer fluvial sediment fraction and therefore got regularly exported out to the Arabian Sea. Poor linkage between magnetic susceptibility and organic carbon content in estuaries of Goa suggest that early diagenesis had minimal impact on the bulk sediment magnetic signal. Our study provide full spectrum of magnetic properties of rocks, soils, and modern sediments, which helped in establishing the magnetic mineral inventory of the tropical estuarine system of Goa. Interpretation of rock magnetic and grain size data of bedload sediments provide crucial insights on sedimentary processes constraining the transport and depositional of magnetic particles and clastic sediment grain size fractions during their transit from source-to-sink. We demonstrate that magnetomineralogical approach presented in this study bears the potential and can be easily applied to trace the modern source-to-sink processes in other larger tropical sedimentary system around the world.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"298 ","pages":"Article 105630"},"PeriodicalIF":2.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886054","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}