Deep-Sea Research Part I-Oceanographic Research Papers最新文献

{"title":"Mapping potential benthic habitats of the Rio Grande Rise, SW Atlantic","authors":"Maria Aline Lisniowski ,&nbsp;Victor Hugo Rocha Lopes ,&nbsp;Eugênio Pires Frazão ,&nbsp;Clóvis Coutinho Motta Neto ,&nbsp;Vadim Harlamov ,&nbsp;Arthur Ayres Neto","doi":"10.1016/j.dsr.2025.104619","DOIUrl":"10.1016/j.dsr.2025.104619","url":null,"abstract":"<div><div>The Rio Grande Rise (RGR), a large and complex submarine feature in the southwestern Atlantic Ocean, was systematically mapped to investigate its geomorphology, substrate heterogeneity, and benthic habitat distribution. High-resolution multibeam bathymetry provided the basis for deriving terrain variables, used to classify major geomorphic units, including plateaus, ridges, and canyons. Seafloor backscatter mosaics and video imagery, analyzed with object-based image analysis, revealed distinct substrate types including ferromanganese crusts, foraminiferal sands, and pteropod shell beds. Bedforms, such as polygonal patterns, circular depressions, and waveforms, indicate active bottom currents and potential fluid migration that shape the terrain. Faunal assemblages differed markedly across habitat types, showing clear associations with substrate and local geomorphology. Patchy sediments on gentle slopes support diverse assemblages with complex trophic dynamics involving mobile predators, scavengers, and a range of invertebrates. Muddy flats and slopes enriched in organic matter host detritivores and burrowing fauna adapted to unconsolidated substrates. Sessile suspension feeders, including corals, sponges, echinoderms, and ascidians, dominated hard-substrate plateaus exposed to hydrodynamic activity. Slopes shaped by gravitational processes and covered with unsorted sediments host opportunistic species sharing functional traits with assemblages from patchy sediment habitats. The resulting habitat map provides a spatial framework for benthic environments across the RGR and documents marked habitat heterogeneity. The absence of systematic biological and sediment sampling constrains the resolution of habitat classification and some areas and taxa were under-sampled. Nevertheless, the outcomes establish a valuable environmental baseline that can guide future research, conservation planning, and resource management in the deep sea.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"226 ","pages":"Article 104619"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145474949","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":"Developing Ireland's ocean observatory network: feasibility and suitability of using a SoundTrap HF300 for passive acoustics from an underwater glider","authors":"Morgane Pommier ,&nbsp;Baptiste Menetrier ,&nbsp;Ross O'Neill ,&nbsp;Kieran Adlum ,&nbsp;Diego del Villar ,&nbsp;Niall Ó Maoiléidigh ,&nbsp;Frederick Whoriskey ,&nbsp;Ross McGill ,&nbsp;Simon Berrow ,&nbsp;Joanne O'Brien","doi":"10.1016/j.dsr.2025.104607","DOIUrl":"10.1016/j.dsr.2025.104607","url":null,"abstract":"<div><div>Autonomous platforms, notably remotely operated underwater gliders, are increasingly used in ocean monitoring. Submersible gliders are robust, cost-effective, have a low carbon footprint, and operate relatively quietly. They enable extended-duration (months) ambient noise measurements and soundscape characterisation over large spatial scales, and are, as a result, promising tools for cetacean passive acoustic monitoring (PAM). Here, we assessed the feasibility of using a commercially available, self-contained recording system (SoundTrap HF300) mounted on a submersible glider to conduct PAM for cetacean calls in coastal European waters. Harbour porpoises and delphinids were successfully recorded during two trial missions over the Malin Shelf. Manual validation of dolphin whistles provided quantification of the rate of false positive detections. Additionally, it allowed a description of submersible glider self-noise that could potentially interfere with the automated detection algorithm or soundscape analysis. We provide recommendations to plan future missions and advocate for a more systematic implementation of this approach in Irish waters in the future.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"226 ","pages":"Article 104607"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145419371","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":"Against all odds: Arctic squid (Cephalopoda, Oegopsida: Gonatus fabricii) reproduce under ice in the central polar Basin","authors":"Alexey V. Golikov ,&nbsp;Henk-Jan Hoving ,&nbsp;Olga L. Zimina ,&nbsp;Rushan M. Sabirov","doi":"10.1016/j.dsr.2025.104618","DOIUrl":"10.1016/j.dsr.2025.104618","url":null,"abstract":"<div><div><em>Gonatus fabricii</em> is the most abundant cephalopod in the Arctic. Its biomass equals that of commercial fishes in the Nordic Basin and supports many predators. It is the only squid that reproduces in the Arctic, where its spawning is known from several geographically confined areas. However, relevant records from the most northern part of its distribution are restricted to one spent female and one paralarva that were both caught in the early 1960s. We describe the reproductive characteristics of a spent female that was encountered at the surface (= ice mooring) in the Amundsen Basin in 2023. It confirms that <em>G. fabricii</em> has low potential (8800–16200 oocytes) and realised fecundity (25–28 % of potential fecundity, 2500–3000 oocytes) compared to most other studied deep-sea squids. Combining this observation with historical records (from 1960s to 2020), we show that <em>G. fabricii</em> might reproduce in the Central Polar Basin, and suggest a spawning area of <em>G. fabricii</em> that encompasses the central Amunsden Basin, eastern Lomonosov Ridge and eastern Makarov Basin. These records demonstrate that <em>G. fabricii</em> is the only nekton species that reproduces in the deep waters of the Central Polar Basin. The Central Polar Basin is the only spawning area of <em>G. fabricii</em>, where its two main whale predators (sperm whale and northern bottlenose whale) do not occur. The absence of predators’ pressure may be among the main reasons that drove <em>G. fabricii</em> from the warmer and more productive Nordic Basin to the colder and less productive Central Polar Basin.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"226 ","pages":"Article 104618"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145419372","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":"Transformations of particulate organic matter from the surface to the abyssal plain in the North Pacific as inferred from compound-specific stable isotope and microbial community analyses","authors":"Lee C. Miller ,&nbsp;Hilary G. Close ,&nbsp;Kalina C. Grabb ,&nbsp;Christine L. Huffard ,&nbsp;Fuyan Li ,&nbsp;David M. Karl ,&nbsp;Kenneth L. Smith ,&nbsp;Edward F. DeLong ,&nbsp;Claudia R. Benitez-Nelson ,&nbsp;Jeffrey C. Drazen ,&nbsp;Brian N. Popp","doi":"10.1016/j.dsr.2025.104597","DOIUrl":"10.1016/j.dsr.2025.104597","url":null,"abstract":"<div><div>Particulate organic matter (POM) produced in surface waters undergoes extensive reworking and breakdown by microbial and metazoan communities as it sinks to the abyssal seafloor and serves as the base of benthic and pelagic food webs. Here, we examined how various size classes of POM in the oligotrophic North Pacific Subtropical Gyre (Station ALOHA) and in the eutrophic California Current System (Station M) undergo microbial alteration throughout the water column. Compound-specific stable isotope analysis showed that sampling method strongly impacts the type of POM quantified as export to the deep sea. Moored abyssal sediment traps captured material that matched the isotopic composition of surface POM, indicating they collected large, fast-sinking particles, in contrast to the more heavily reworked particles collected with <em>in situ</em> filtration at the same depths. Extending δ¹⁵N analyses of amino acids to bathypelagic and abyssopelagic depths for the first time, we confirmed that most particle remineralization and reworking occurs within the upper ∼400 m of the water column regardless of initial surface productivity. At Station ALOHA, we further used 16S rRNA barcoding to characterize the microbial communities associated with the POM. We found that chemolithoautotrophic ammonia-oxidizing archaea are abundant in the upper water column at Station ALOHA and that their abundance corresponded to regions of high heterotrophic reworking as indicated by amino acid isotope analysis.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104597"},"PeriodicalIF":2.1,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157709","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":"Design and experimentation of self-contained digital cone for deep sea","authors":"Zhangyong Jin ,&nbsp;Jin Guo ,&nbsp;Jiawang Chen ,&nbsp;Bijin Liu ,&nbsp;Zhonghui Zhou ,&nbsp;Feng Gao ,&nbsp;Ziqiang Ren","doi":"10.1016/j.dsr.2025.104600","DOIUrl":"10.1016/j.dsr.2025.104600","url":null,"abstract":"<div><div>Seabed soil properties play an essential role in a wide range of marine engineering applications. This study presents the design of a distinctive self-contained cone that is in line with international standards and suitable for deep-sea operations. This design aims to address and overcome the current limitations faced by cone penetration testing probes, such as problems related to rod connections and signal attenuation. An inclination-based posture correction algorithm was introduced to obtain vertical penetration displacement. Additionally, a calibration curve was established between applied load on the probe and the recorded strain gauge signal. Based on theoretical calculations and finite element simulation experiments, an analysis and research were carried out on the impact of deep-sea environmental factors, such as high-pressure environments and seal ring friction, on penetration survey results. Simultaneously, a tidal flat test was performed. By comparing the data collected by the probe with that of the vane shear test, the accuracy of the probe was verified. In the final implementation stage, the cone was introduced to a specially designed CPT station in the South China Sea. The obtained geotechnical parameters largely corresponded with the previously examined strata characteristics, confirming the cone's reliability and effectiveness for in-situ survey work in deep-sea environments.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104600"},"PeriodicalIF":2.1,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219854","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":"Deep-sea biotope classification using opportunistic sampling: insights for future management","authors":"Heidy Q. Dias ,&nbsp;Kerstin Kröger ,&nbsp;Andrew J. Wheeler ,&nbsp;Riccardo Arosio ,&nbsp;Audrey Recouvreur ,&nbsp;Tim P. Le Bas ,&nbsp;Isobel A. Yeo ,&nbsp;Patrick C. Collins","doi":"10.1016/j.dsr.2025.104604","DOIUrl":"10.1016/j.dsr.2025.104604","url":null,"abstract":"<div><div>An iterative approach to optimise deep-sea biotope classification using a combination of acoustic data and Remotely Operated Vehicle (ROV) video footage was developed and tested at the Tropic Seamount site in the Northeast Atlantic. Two methods for biotope classification were compared: a top-down approach based on acoustic substrate classification followed by biological characterisation, and a bottom-up approach using multivariate analysis of biological assemblages only. Video transects were analysed at two spatial resolutions (200 m and 50 m segments) to assess scale effects on biotope delineation. Biotopes were classified using a combination of geological and biological data with each biotope representing a distinct combination of substrate types and their associated benthic assemblages. The bottom-up approach using 50 m segments identified 12 distinct biotopes with stronger environmental correlations compared to broader classifications at 200 m scale. This study demonstrates that shorter transects (50 m) combined with bottom-up sampling approaches are preferable for capturing the ecological heterogeneity characteristic of deep-sea seamount environments, with important implications for vulnerable marine ecosystem identification and spatial management.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104604"},"PeriodicalIF":2.1,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266257","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":"Corrigendum to “Megafauna of the RMS Titanic shipwreck and a nearby seamount ridge in the deep sea of the western North Atlantic” [Deep Sea Research Part I: Oceanographic Research Papers (2025) 104544]","authors":"Jason Cleland ,&nbsp;Anna Gebruk ,&nbsp;J. Murray Roberts ,&nbsp;Dmitry Aleynik ,&nbsp;Beverly McClenaghan ,&nbsp;Rod Mather ,&nbsp;Bridget Buxton ,&nbsp;Steve W. Ross","doi":"10.1016/j.dsr.2025.104555","DOIUrl":"10.1016/j.dsr.2025.104555","url":null,"abstract":"","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104555"},"PeriodicalIF":2.1,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361529","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":"Petrogenesis of igneous rocks from the Yap Arc, west Pacific: implications for its tectonic evolution","authors":"Quanshu Yan ,&nbsp;Shishuai Yan ,&nbsp;Long Yuan ,&nbsp;Zhenxuan Liu ,&nbsp;Yanguang Liu ,&nbsp;Gang Yang","doi":"10.1016/j.dsr.2025.104577","DOIUrl":"10.1016/j.dsr.2025.104577","url":null,"abstract":"<div><div>The Yap arc-trench system was formed by the westward subduction of the Pacific/Caroline Plate beneath the Philippine Sea Plate (PSP) and was subsequently influenced by the jam of the Caroline Plateau into the Yap Trench. This makes it an ideal area for deciphering the geological evolution of an island arc when an oceanic plateau approaches a subduction zone. In the present study, we analyzed the mineralogical, geochemical, and isotopic compositions of peridotite, gabbroic diorite, and volcanic rocks collected from the southern Yap Arc. The results show that: (1) the peridotites are forearc peridotites, representing residues after 10–15 % partial melting of the sub-arc mantle wedge, caused by fluids released from the subducted slab during the subduction of the oceanic plateau. These peridotites were subsequently exposed in the Yap Arc due to tectonic erosion of the subducting plate. (2) The Yap Arc gabbro diorites share similarities with infant arc lavas and may have formed through a relatively low degree of partial melting of sub-arc basic rocks. (3) The Yap Arc basalts were produced by 2–5 % partial melting of the southern Yap peridotites under the influence of approximately 0.5 % sediment input. These basalts exhibit characteristics typical of the Pacific MORB-type mantle. (4) The andesites of the Yap Arc were formed through partial melting of preexisting basic rocks at the arc front, influenced by 0.5–1 % sediment melt. Hf-Nd isotopic characteristics of the southern Yap Arc basalts have validated the entry of Pacific MORB-type mantle into the Yap sub-arc mantle via a slab gap.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104577"},"PeriodicalIF":2.1,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888832","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 near field study of sediment plumes for a pre-prototype nodule collector trial in the abyssal Pacific Ocean","authors":"Raphael Ouillon,&nbsp;Carlos Muñoz-Royo,&nbsp;Souha El Mousadik,&nbsp;Thomas Peacock","doi":"10.1016/j.dsr.2025.104595","DOIUrl":"10.1016/j.dsr.2025.104595","url":null,"abstract":"<div><div>Observations from multi-platform monitoring of the sediment plume created during a pre-prototype deep-seabed nodule mining collector trial in the Pacific Ocean are presented and discussed. A combination of fundamental and geophysical fluid dynamics theory, as well as built-for-purpose numerical modeling, is used to interpret the observations. In turn, the implications of the interpreted observations for both monitoring and modeling of deep-seabed mining sediment plumes are considered. The observations occurred over a wide range of spatial and temporal scales, obtained through collector-mounted instruments within the mining area, instrumented moorings hundreds of meters away from the mining activity, and instrumented AUV operations at distances of hundreds to thousands of meters away from the test site. At each scale, interpreting plume observations is non-trivial because of the complexity of plume dynamics. Through interpretation of the observations, we exemplify the challenge of using plume monitoring or modeling alone in order to create a complete, non-ambiguous representation of the plume that is spatio-temporally resolved. Our analysis shows that an effective strategy that encompasses monitoring technology, deployment configuration, data interpretation, modeling approach, model parametrization, and model validation must be informed by plume physics at all levels. Furthermore, non-hydrostatic physics are instrumental to the evolution of plumes, and thus plume modeling for deep-sea mining sediment plumes needs to resolve non-hydrostatic processes.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104595"},"PeriodicalIF":2.1,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time series prediction of sound speed profiles in complex shallow water environment","authors":"Ziwen Wang ,&nbsp;Qianqian Li ,&nbsp;Zhenglin Li ,&nbsp;Jixing Qin","doi":"10.1016/j.dsr.2025.104575","DOIUrl":"10.1016/j.dsr.2025.104575","url":null,"abstract":"<div><div>Sound speed exhibits significant spatio-temporal variations in shallow waters, particularly in environments with internal solitary waves (ISWs). The temporal prediction of sound speed profiles (SSPs) can be transformed into the prediction of empirical orthogonal function (EOF) coefficients. However, dynamic oceanic phenomena can cause significant variations in the background field and EOFs, leading to representational errors. Studies have shown that the sound speed at the depth corresponding to the extreme point of the first EOF contains the most information, which can effectively reflect the SSP structure. To reduce the impact of the background field and EOF mismatch on SSP prediction accuracy, an indirect approach is proposed. Compared to directly predicting the EOF coefficients using a Long Short-Term Memory (LSTM) network, the indirect approach utilizes historical data to establish the relationship between the depth-fixed sound speed at a specified depth and the EOF coefficients using a back propagation (BP) network. The LSTM then predicts the depth-fixed sound speed for the test set. Finally, the EOF coefficients are obtained from the trained BP network and subsequently used to reconstruct the SSPs. A negative coupling relationship is observed between the first EOF component estimated by the indirect approach and the background field. This relationship causes the mutual cancellation of two error components, ultimately reducing the SSP prediction error. The indirect approach substantially enhances SSP prediction accuracy compared to the direct approach, reducing errors by approximately 0.9 m/s, reaching approximately 0.67 m/s. Moreover, it maintains high prediction accuracy with an error of approximately 0.57 m/s with a representative background field.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104575"},"PeriodicalIF":2.1,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895904","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}