Marine Geology最新文献

{"title":"Variations in thermocline depth and their response to the East Asian Monsoon in the Northern South China Sea during the Early-Middle Miocene: Evidence from planktonic foraminifera","authors":"Yamin Lu ,&nbsp;Baoqi Huang ,&nbsp;Fang Chen","doi":"10.1016/j.margeo.2026.107721","DOIUrl":"10.1016/j.margeo.2026.107721","url":null,"abstract":"<div><div>This study reconstructs thermocline depth variations and their response to the East Asian Monsoon (EAM) in the northern South China Sea (SCS) during the early-middle Miocene (18–12 Ma) based on planktonic foraminifera analyses from IODP Hole U1505C. Stable oxygen isotope analyses were conducted on all planktonic foraminiferal species from four key time slices (11.99 Ma, 13.01 Ma, 14.87 Ma, and 17.35 Ma). By integrating cluster analysis results, the vertical distribution of planktonic foraminifera in the water column was reconstructed. Variations in thermocline depth were then inferred from the relative abundance ratio of shallow-dwelling to deep-dwelling species. When combined with other marine and terrestrial proxies, the upper water column evolution in the northern SCS primarily reflects EAM dynamics, showing consistency with multi-proxy records: (1) 18.0–17.2 Ma: weakening of the East Asian summer monsoon (EASM) with slight East Asian winter monsoon (EAWM) intensification; (2) 17.2–14.7 Ma: EASM peak intensity with stable EAWM conditions; (3) 14.7–13.8 Ma: EASM decline accompanied by EAWM intensification; and (4) 13.8–12.0 Ma: concurrent weakening of both EAWM and EASM. Furthermore, our synthesis suggests that the dominant forcing mechanism of the monsoon system shifted from regional tectonic control during the warm MCO to global climatic forcing during the MMCT, underscoring the differential sensitivity of the EAM to varying drivers across major climate thresholds.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"493 ","pages":"Article 107721"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170292","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":"Integrating the Bruun rule with sediment compatibility analysis for shoreline change evaluation under water level fall","authors":"Hesamodin Enayatighadikolaei ,&nbsp;Takayuki Suzuki ,&nbsp;Martin Mäll ,&nbsp;Mohsen Soltanpour","doi":"10.1016/j.margeo.2025.107701","DOIUrl":"10.1016/j.margeo.2025.107701","url":null,"abstract":"<div><div>Shoreline progradation in enclosed basins such as the Caspian Sea—driven by climate-induced hydrological change—poses unique challenges for coastal prediction, as most existing models were developed for water-level rise and open-coast dynamics. The original Bruun rule assumes a closed sediment budget and therefore tends to overpredict shoreline advance under falling water levels, overlooking the offshore loss of finer sediment fractions. To address this gap, the study introduces a new index, the Compatibility Index (CI), and integrates it into the Bruun rule, comparing six CI methods across six sandy and two sandy–gravel monitoring stations. While the Bruun rule was originally designed for sandy beaches, its applicability was extended here to mixed sand–gravel profiles. A practical decision framework—combining acceptable CI ranges from three prioritized methods and local bed slope—identifies an optimal CI (CI_O) for each station. Shoreline change from 2013 to 2022 was tracked using cross-shore profiles and high-resolution satellite imagery. Incorporating the CI_O into the Bruun rule reduced root mean square error from 61.3 m to 21.4 m, mean absolute error from 49.0 m to 16.6 m, and mean bias error from 49.0 m to 14.6 m, improving prediction accuracy by 73.2%. The resulting model delivers robust, site-specific shoreline forecasts and provides a practical tool for coastal managers planning setback zones or adaptation strategies in enclosed-basin environments, while offering a transferable framework for similar settings worldwide.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"493 ","pages":"Article 107701"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928349","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 bed slope on turbidity currents interacting with an obstacle: Insights from Large Eddy Simulations","authors":"Said Alhaddad ,&nbsp;Ching-Sen Wu ,&nbsp;Lynyrd de Wit","doi":"10.1016/j.margeo.2026.107720","DOIUrl":"10.1016/j.margeo.2026.107720","url":null,"abstract":"<div><div>Understanding the behavior of turbidity currents is crucial for the effective and sustainable management of natural and artificial hydraulic systems. This study employs a high-resolution numerical model based on the Large Eddy Simulation (LES) approach to investigate the effect of bed slope on the dynamics and depositional behavior of turbidity currents interacting with a triangular obstacle in a channel. Six bed slopes were studied ranging from 0% to 4.5%. Our analysis focused mostly on the quasi-steady-state flow conditions upstream of the obstacle. The results reveal that steeper slopes enhance sediment transport capacity, leading to reduced sediment deposition rates along the bed and thus a decline in the obstacle’s sediment-retention efficiency. The increased transport capacity primarily results from higher flow velocities rather than increased sediment concentrations. Detailed analysis of velocity distributions upstream of the obstacle, under quasi-steady state, showed that the velocity profiles are distorted differently among bed slopes as a result of the interplay between flow inertia and the adverse pressure gradient induced by the obstacle. Recirculation zones are observed for the milder bed slopes (0–1.5%), whereas these zones disappear for steeper slopes (3–4.5%), indicating the dominance of inertial effects.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"493 ","pages":"Article 107720"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170107","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 new and more accurate overfill ratio for beach nourishments and its comparison with James' RA","authors":"Antonio Contreras-de-Villar ,&nbsp;Enzo Pranzini ,&nbsp;Giorgio Anfuso ,&nbsp;Juan J. Muñoz-Perez","doi":"10.1016/j.margeo.2026.107705","DOIUrl":"10.1016/j.margeo.2026.107705","url":null,"abstract":"<div><div><span><span>Pranzini et al. (2018)</span></span> designed a method, for borrowed sediment selection in beach nourishment projects, that solved the problems inherent to James' abacus (1975). However, it suffered in turn from the lack of an overfill ratio. A new and more accurate methodology is presented here to calculate the mentioned ratio. To demonstrate the implications of the new proposed method, the overfill ratios calculated are compared with those obtained using the method of James (R_A) for nine beaches and nourished sands with different granulometries. The comparison showed that the method of <span><span>James (1975)</span></span> predicted a much larger fraction of the borrow sediment to be unstable, thus requiring higher nourishment volumes to achieve a certain beach width and implying increased economic costs<em>.</em></div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"493 ","pages":"Article 107705"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979525","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":"Combined flow-induced bed shear stress and sediment-biologic dynamics in a supratidal flat of the Bahía Blanca Estuary during a positive storm surge","authors":"Camila Stempels Bautista ,&nbsp;Lucía Maisano ,&nbsp;Mauricio M. Perillo ,&nbsp;Gerardo M.E. Perillo ,&nbsp;Diana G. Cuadrado","doi":"10.1016/j.margeo.2026.107715","DOIUrl":"10.1016/j.margeo.2026.107715","url":null,"abstract":"<div><div>This study examines bed shear stress generated by combined flows (<span><math><msub><mi>τ</mi><mn>0</mn></msub></math></span>) in a supratidal flat of the Bahía Blanca Estuary during a spring tide coinciding with a positive storm surge driven by an extratropical storm and evaluates the associated sedimentological and biological responses. Bed shear stress <span><math><msub><mi>τ</mi><mn>0</mn></msub></math></span> was quantified using high-frequency acoustic Doppler velocimeter (ADV) measurements and Reynolds stress estimates. They were analyzed together with cm-scale bedform observations and chlorophyll-<em>a</em> (Chl-<em>a</em>) and phaeopigment concentrations as proxies for photosynthetic microbial activity. Analyses of synoptic maps revealed an extratropical storm advancing SW–NE generating a positive storm surge of up to ∼1 m. During the event, <span><math><msub><mi>τ</mi><mn>0</mn></msub></math></span> frequently exceeded the critical bed shear stress of sterile sediments (<span><math><msub><mi>τ</mi><mrow><mn>0</mn><mi>c</mi></mrow></msub></math></span>), occurring persistently during ebb tide. During slack tide, sediment transport was observed to occur primarily under the influence of wind-induced waves. Despite the stabilizing effect of the biofilm, which increases <span><math><msub><mi>τ</mi><mrow><mn>0</mn><mi>c</mi></mrow></msub></math></span>, observed changes in surficial micro-geomorphology, together with <span><math><msub><mi>τ</mi><mn>0</mn></msub></math></span> estimates, indicate that combined flow forcing was sufficient to induce sediment transport during supratidal inundation. These physical disturbances were accompanied by an approximately 40% reduction in Chl-<em>a</em> concentrations during the storm period and a significant increase in phaeopigments. Therefore, the biofilm covering the supratidal flat sediments did not prevent erosion under the hydrodynamic forces generated during an extratropical storm event coupled with a spring tide. This event-based case study highlights the value of integrating hydrodynamic, sedimentological, and biological indicators in a supratidal setting, providing <em>in situ</em> evidence of the coupled response of supratidal flats to extreme hydrodynamic forcing.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"493 ","pages":"Article 107715"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023701","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":"Shoreline evolution in a low-lying coastal region under anthropogenic influence","authors":"Matteo Meli ,&nbsp;Enrica Vecchi ,&nbsp;Claudia Romagnoli","doi":"10.1016/j.margeo.2025.107679","DOIUrl":"10.1016/j.margeo.2025.107679","url":null,"abstract":"<div><div>This study aims to reconstruct and analyze shoreline evolution along the highly urbanized Emilia-Romagna coast (Italy) over the period 1984–2023 using satellite-derived shorelines. Landsat and Sentinel-2 imagery were processed with the CoastSat toolbox, and shoreline positions were corrected for tide and wave setup before deriving yearly averages from 2,200 transects. While the spatial resolution of yearly-averaged SDS is lower than that of conventional techniques, this approach enables, for the first time in this region, the reconstruction of shoreline dynamics as a continuous time series spanning interannual to multi-decadal scales. Results highlight substantial spatial and temporal variability across the shoreline, driven by the interplay of natural processes and anthropogenic interventions such as coastal defenses, repeated nourishments, and sediment extraction. Despite ongoing sea-level rise and subsidence, most of the coast exhibits stability or net advancement, largely maintained through human interventions. The resulting dataset provides one of the most temporally extensive records of shoreline variability for the Emilia-Romagna coast and represents a valid basis for future monitoring and coastal management.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"492 ","pages":"Article 107679"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145623006","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":"Morphological response and recovery of a headland-bay beach under sequential typhoon impacts","authors":"Qi Chen ,&nbsp;Yang Zhang ,&nbsp;Fangting He ,&nbsp;Shihao Liu ,&nbsp;Ya Ping Wang ,&nbsp;Jianjun Jia","doi":"10.1016/j.margeo.2025.107698","DOIUrl":"10.1016/j.margeo.2025.107698","url":null,"abstract":"<div><div>Climate change is increasing the frequency and severity of coastal hazards, with rising sea levels and intensifying typhoons accelerating coastal erosion worldwide. Although headland-bay beaches are widely regarded as topographically protected, they are not immune to substantial erosion during intense typhoons. However, their morphodynamic responses to extreme events—particularly sequential typhoon impacts—remain poorly quantified and mechanistically understood, largely due to the lack of high-resolution monitoring. Here we examine Dasha Beach in Zhejiang Province, China, using high-resolution UAV-derived topography to quantify morphological changes associated with two sequential typhoons, Hinnamnor and Muifa, in September 2022. Hinnamnor generated 9827 m³ of net erosion concentrated in the central beach, and Muifa caused an additional 6370 m³ of erosion, completely removing the remaining beach berm. Post-typhoon recovery deposited 7352 m³ of sediment, predominately reconstructing the northern beach berm, and restoring volumes to pre-Muifa but not pre-Hinnamnor levels. Hydrodynamic analyses reveal pronounced cross-bay gradients in wave energy, with stronger forcing in the northern sector producing enhanced erosion during the typhoons and greater accretion during recovery. During typhoons, waves primarily drove cross-shore sediment transport. In the recovery phase dominated by obliquely incident waves, however, waves facilitated both cross-shore and longshore sediment transport. Swash processes (uprush and backwash) dominated sediment transport, while water-level variations controlled its spatial extent. Specifically, Muifa-induced high water levels combined with energetic waves led to severe berm erosion. The stable berm sediments, derived from well-sorted backshore and dune areas, exhibited minimal grain-size change under typhoon impact. The coarser sediments indicate that the depositional material during the recovery phase originated from the submarine seabed. Although Dasha Beach currently exhibits substantial short-term resilience, increasingly frequent and intense typhoons will pose escalating challenges. Therefore, the assessment of the need for human intervention on the beach and the design of appropriate beach nourishment schemes are among the key focuses for future research. Overall, these findings refine the process-based understanding of storm-driven morphodynamics, and provide a basis for safeguarding headland-bay beach stability.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"492 ","pages":"Article 107698"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839915","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":"Environmental changes in the Okinawa Trough over the last 88 ka BP: Evidence from high-resolution bulk mineralogy","authors":"Lingfeng Luo ,&nbsp;Xuguang Feng ,&nbsp;Jianjun Zou ,&nbsp;Xisheng Fang ,&nbsp;Xinru Xue ,&nbsp;Ruxi Dou ,&nbsp;Baohua Han ,&nbsp;Qingchao Wang ,&nbsp;Aimei Zhu ,&nbsp;Zhi Dong ,&nbsp;Gang Yang ,&nbsp;Xuefa Shi","doi":"10.1016/j.margeo.2025.107699","DOIUrl":"10.1016/j.margeo.2025.107699","url":null,"abstract":"<div><div>Deciphering sediment source-to-sink processes along the continental margin remains a frontier in marine sedimentology and paleoenvironmental research. The thick sedimentary sequences in the East China Sea and the Okinawa Trough provide an ideal setting for deciphering the riverine sediment discharge from East Asian rivers into the ocean and the evolution of the Kuroshio Current. While various proxies have been used to investigate sedimentary processes and paleoenvironmental evolution in the Okinawa Trough, debates persist regarding the variation processes, spatial patterns, and controlling mechanisms of sediment fluxes during the late Quaternary. Here, we present high-resolution bulk minerals from core CSH1 in the northern Okinawa Trough to investigate variations in terrigenous sediment composition, provenance, and fluxes over the last 88 ka BP. Dominant minerals in core CSH1 include quartz, plagioclase, mica, and calcite. Notably, calcite content and the calcite/quartz ratio exhibit lower values in glacials and higher values in interglacials, predominantly reflecting biogenic input. Enhanced Kuroshio Current facilitated warm and nutrient-rich waters to the northern Okinawa Trough and stimulate high calcareous productivity during interglacials. Quartz, plagioclase, and mica are typical detrital minerals, primarily derived from the East Asian continent and the Japan island arc. Sediment provenance indicates that the Changjiang and the Huanghe mixed inputs dominated during Marine Isotope Stage (MIS) 5.1, the Huanghe inputs dominated during MIS 4 to MIS 2, while Japan island arc volcaniclastic contributions increase significantly after 8 ka BP. Sea-level exerts a first-order control on terrestrial sediment supply. Other factors including East Asian Summer Monsoon, Kuroshio Current variability, and paleo-eustasy positioning have secondary influence on sediment pattern of the Okinawa Trough.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"492 ","pages":"Article 107699"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839914","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":"Vulnerability of blue carbon stocks to disturbance in sediments with low burial efficiency","authors":"Z.A. Roseby ,&nbsp;T. Sengupta ,&nbsp;S.L. Ward ,&nbsp;D.F. Vosper ,&nbsp;M. Blaauw ,&nbsp;C.M. Roberts ,&nbsp;J.D. Scourse","doi":"10.1016/j.margeo.2025.107676","DOIUrl":"10.1016/j.margeo.2025.107676","url":null,"abstract":"<div><div>Continental shelf sediments – particularly soft, muddy habitats - serve as significant reservoirs of organic carbon over glacial-interglacial timescales and are subject to disturbance, notably from mobile bottom fishing gear. The quantity and quality of accumulated organic carbon varies across shelf environments, with muds storing more organic carbon than other substrate types. For effective marine management, it has been recommended that the reactivity, or ‘quality’, of organic matter should be considered when assessing the vulnerability of sedimentary carbon to disturbance. If management interventions are to be made to protect vulnerable organic carbon reservoirs on the seafloor, then it is also important to consider the burial efficiency of carbon. In areas of rapid sediment accumulation, carbon will be moved from surface to geological reservoirs more quickly, thus facilitating carbon sequestration. In this study, we assess the quantity, quality, and accumulation rate of organic carbon in the muddy depocenter of the Fladen Ground, northern North Sea - an area of low active sediment accumulation, with both historic and ongoing bottom trawling. All sediment cores analysed in this study display upwards coarsening of surface sediments, consistent with sediment disturbance and winnowing. Southern Fladen Ground sediments are especially well sorted, depleted in total organic carbon, and enriched in calcium carbonate - patterns that align with intensified trawling. Our results show very low modern organic carbon accumulation rates (∼0.7 g C m⁻² yr⁻¹), low organic matter reactivity (18.5 % labile), and that modern trawl events can potentially disturb sediments and carbon accumulated over the last ∼2300 years. These results indicate that sediment and organic carbon accumulation rates are an important consideration when assessing the vulnerability of sedimentary carbon.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"492 ","pages":"Article 107676"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692428","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":"Taphonomic signature of benthic foraminifera linked to methane release in the Barents Sea","authors":"Gabriella M. Boretto ,&nbsp;Mathia Sabino ,&nbsp;Fiorenza Torricella ,&nbsp;Gianmarco Ingrosso ,&nbsp;Alessio Nogarotto ,&nbsp;Giuliana Panieri ,&nbsp;Jens Hefter ,&nbsp;Gesine Mollenhauer ,&nbsp;Leonardo Langone ,&nbsp;Silvia Giuliani ,&nbsp;Tommaso Tesi ,&nbsp;Lucilla Capotondi","doi":"10.1016/j.margeo.2025.107693","DOIUrl":"10.1016/j.margeo.2025.107693","url":null,"abstract":"<div><div>This study investigates methane seepage dynamics over the past several centuries in the southwestern Barents Sea through an integrated analysis of foraminiferal taphonomy, stable carbon isotopes, and the lipid biomarkers glycerol dialkyl glycerol tetraethers (GDGT) based molecular biomarkers. We examined the preservation state of nine calcareous benthic foraminiferal species from sediment core HH1141, grouping test alterations into five taphonomic categories. These preservation patterns correlate with geochemical indicators of methane emissions, such as depleted δ¹³C values of carbonate tests and organic matter and elevated Methane Index (MI), allowing the identification of three stratigraphic units reflecting distinct seepage regimes. Along with this gradient, electron microscopy and microprobe analyses reveal widespread diagenetic overgrowths and mineral replacements linked to anaerobic oxidation of methane. Furthermore, species-specific responses highlight that <em>Elphidium clavatum</em>, <em>Stainforthia feylingi</em>, <em>Stainforthia loeblichi</em> and <em>Cassidulina reniforme</em> are more susceptible to alteration, while <em>Melonis barleeanus</em> shows remarkable resistance. The observed temporal variability in methane seepage is interpreted as the result of multifactorial environmental drivers, including changes in subsurface dynamics and bottom-water conditions. This multidisciplinary approach demonstrates the utility of foraminiferal taphonomy as a sensitive proxy for methane-rich environments and cold seep evolution, especially in polar regions undergoing rapid climatic and oceanographic change.</div></div>","PeriodicalId":18229,"journal":{"name":"Marine Geology","volume":"492 ","pages":"Article 107693"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748361","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}