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

{"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":"2025-09-23","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":"Trophic ecology of Ophiuroidea and Asteroidea in the Clarion-Clipperton-Fracture Zone (Central Pacific)","authors":"Tanja Stratmann ,&nbsp;Erik Simon-Lledó ,&nbsp;Marcel T.J. van der Meer ,&nbsp;Magdalini Christodoulou ,&nbsp;Sven Rossel ,&nbsp;Ana Colaço","doi":"10.1016/j.dsr.2025.104598","DOIUrl":"10.1016/j.dsr.2025.104598","url":null,"abstract":"<div><div>Abyssal seascapes represent over 50 % of the Planet's surface, but the life history traits of fauna present in these ecosystems remain poorly understood. Ophiuroidea constitute about one third of the invertebrate megabenthos assemblage between 3800 m and 4800 m water depth in the Clarion-Clipperton Fracture Zone (CCZ); Asteroidea are present in lower densities. We hypothesize that (1) Ophiuroidea, Xenophyophoroidea, and Hexactinellida have a predator-prey relationship, where Ophiuroidea feed on foraminifera- and sponge-derived organic matter (OM). (2) Ophiuroidea have a reduced dependency on fresh phytodetritus. (3) Brisingida (order of Asteroidea), often cling to stalks to have easier access to particulate OM sinking to the seafloor.</div><div>To test these three hypotheses, we combined bulk and compound-specific stable isotope analyses of fauna (Ophiuroidea, Asteroidea) and sediments with analyses of seafloor images from the eastern CCZ.</div><div>All investigated Echinodermata species had a high trophic level. Phospholipid-derived fatty acids (PLFAs) used as biomarkers suggest that <em>Silax daleus</em> consumes sedimentary detritus that is processed by its gut microbiome. <em>Ophiacantha cosmica</em> is likely a top consumer or scavenger, <em>Ophiosphalma glabrum</em> is an opportunistic omnivore ingesting phytodetritus, bacteria, Crustacea, and Foraminifera, while <em>Ophiuroglypha</em> cf. <em>polyacantha</em> (sp. 6) is a more selective omnivore. <em>Freyella benthophila</em> sits mostly on stalks of Hexactinellida and uses this elevated position to catch phytodetritus and zooplankton. <em>Freyastera</em> cf. <em>tuberculata</em>, in comparison, sits mostly on polymetallic nodules from where it preys upon Crustacea moving on the sediment surface. We confirmed that Ophiuroidea are less dependent on phytodetritus, and they consume foraminifera- and sponge derived OM.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104598"},"PeriodicalIF":2.1,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157708","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":"Faunal communities of Arctic deep-water methane seeps are specialised with links to hydrothermal vents","authors":"Mari H. Eilertsen ,&nbsp;Marte L.B. Klemetsdal ,&nbsp;Jon A. Kongsrud ,&nbsp;Anne Helene S. Tandberg ,&nbsp;Tom Alvestad ,&nbsp;Brenda L. Esteban Vazquez ,&nbsp;Alessandra Savini ,&nbsp;Claudio Argentino ,&nbsp;Giuliana Panieri","doi":"10.1016/j.dsr.2025.104594","DOIUrl":"10.1016/j.dsr.2025.104594","url":null,"abstract":"<div><div>Cold seeps are common seafloor features on Arctic continental margins, but the cold seep fauna in the region has mainly been characterized from sites on the continental shelf or upper slope (&lt;800 m). Here, we characterize the fauna of two deep-water cold seeps on the Vestnesa (1300 m) and Svyatogor Ridges (1900 m) based on morphological analyses and DNA barcoding. The Svyatogor Ridge system has been hypothesized to represent a hybrid system with processes resembling both hydrothermal vents and cold seeps, however, until now, it had not been tested whether its fauna shows any similarity to regional hydrothermal vent fauna. The present study documents a clearly specialised fauna at both seeps with seven putatively new and seep-specialised species recorded as well as eight species shared with the sedimented hydrothermal vent Loki's Castle approximately 540 km further south on the Mohns Ridge. The dataset presented illustrates a close connection between vent and seep faunas in the Arctic, presumably driven by the close geographic proximity of vents and seeps and the presence of intermediate habitats such as sedimented vents.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104594"},"PeriodicalIF":2.1,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266254","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":"Satellite-detected sea surface chlorophyll-a penetrating fronts off the south coast of Java Island","authors":"Tengfei Xu ,&nbsp;Dingqi Wang ,&nbsp;Qinsheng Wei ,&nbsp;Shujiang Li ,&nbsp;R.D. Susanto ,&nbsp;Guanlin Wang ,&nbsp;Fei Teng ,&nbsp;T. Agustiadi ,&nbsp;M. Trenggono ,&nbsp;Priyadi Dwi Santoso ,&nbsp;Zexun Wei","doi":"10.1016/j.dsr.2025.104593","DOIUrl":"10.1016/j.dsr.2025.104593","url":null,"abstract":"<div><div>In this study, we report the phenomenon of sea surface chlorophyll-a (SSC) penetrating front south of Java Island based on satellite observations. The SSC penetrating front occurs frequently (∼17 times per month) during the upwelling season (June to November) and can also be observed (∼4 times per month) during the non-upwelling season (December to May). The offshore distance of the SSC penetrating front can reach up to 500 km and 350 km in the upwelling and non-upwelling seasons, respectively. Eddy-related advection along the eddy edges plays an important role in maintaining the SSC penetrating front by transporting nutrient-rich waters from the Java coast. The interannual variability of the SSC penetrating front is closely associated with the ENSO and IOD events, which tend to induce anomalous upwelling and enhanced mesoscale eddy activity, thereby leading to more frequent occurrences of the SSC penetrating fronts south of Java Island.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104593"},"PeriodicalIF":2.1,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118272","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":"Molluscan assemblages from the shelf and upper continental slope off Guinea-Bissau (north-west Africa)","authors":"Sara Castillo ,&nbsp;Ana Ramos ,&nbsp;Fran Ramil","doi":"10.1016/j.dsr.2025.104592","DOIUrl":"10.1016/j.dsr.2025.104592","url":null,"abstract":"<div><div>The diversity and distribution patterns of molluscs in waters off Guinea-Bissau were investigated alongside their relationships with abiotic factors. Samples were collected using commercial bottom trawls during Spanish <em>Bissau-0810</em> and three <em>FAO-CCLME</em> expeditions carried out on shelf and continental slope areas, over a depth range of 20–1000 m. A total of 126 species of mollusc were identified (86 gastropods, 39 bivalves and 1 scaphopod). Xenophoridae and Muricidae were the most frequent families, and the gastropod <em>Ponderiana digitata</em> was the most frequent species. Maximum mollusc density occurred between 100 and 200 m depth, with the bivalve <em>Neopycnodonte cochlear</em> dominating. Average diversity by strata decreased with increasing depth, with the maximum in shallow waters (&lt;50 m). Separation of the three main assemblages (continental shelf, upper slope and middle slope) was influenced by a combination of environmental factors including depth, bottom temperature, sediment type and carbonates.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104592"},"PeriodicalIF":2.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095493","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":"Biodiversity and distribution of deep-pelagic fishes from the subtropical Southwestern Atlantic","authors":"Aline Barbosa Silva ,&nbsp;Leandro Nolé Eduardo ,&nbsp;Juliano Lauser Coletto ,&nbsp;Laura Alma Costa ,&nbsp;Rafael André Avila ,&nbsp;José Henrique Muelbert","doi":"10.1016/j.dsr.2025.104591","DOIUrl":"10.1016/j.dsr.2025.104591","url":null,"abstract":"<div><div>We conducted a biodiversity assessment of deep-pelagic fish species in the Subtropical Southwestern Atlantic Ocean, using three complementary fishing methods across depths from 97 to 2570 m between 1996 and 2022. This analysis includes 926,657 specimens, representing 74 species from 11 orders and 18 families. Using these data, we present relationships with environmental factors and a detailed species inventory illustrating diversity and dominance patterns. Distinct from other Southwestern Atlantic ecoregions, our findings reveal high species dominance coupled with relatively low diversity. Among the collected taxa, <em>Diaphus dumerilii</em> (Myctophidae) and <em>Maurolicus stehmanni</em> (Sternoptychidae) constituted over 90 % of all specimens. Analysis of their distribution in relation to water properties reveals that these species exhibit a greater tolerance to a broad range of temperature and salinity conditions, an adaptive trait that likely drives their ecological dominance in the deep-pelagic ecosystems of the study area. The dominance pattern held consistently across all fishing methods, though we observed notable variation in species diversity and abundance between collection techniques. This study provides an important assessment of the deep-pelagic fish fauna in this region, establishing a valuable baseline for future research targeting this largely unexplored fauna.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104591"},"PeriodicalIF":2.1,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049313","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":"2025-09-05","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":"Factors structuring macrofaunal communities of hydrocarbon seeps along the Cascadia margin","authors":"Penny J. McCowen ,&nbsp;Jill R. Bourque ,&nbsp;Donald C. Behringer ,&nbsp;Nancy G. Prouty ,&nbsp;Amanda W.J. Demopoulos","doi":"10.1016/j.dsr.2025.104590","DOIUrl":"10.1016/j.dsr.2025.104590","url":null,"abstract":"<div><div>Cold seeps, fueled by hydrocarbon-based chemosynthesis, support unique benthic communities that can vary across small spatial scales influenced by local geochemistry. We examined the community structure and function of macrofauna in cold seeps along the Cascadia margin on the edge of gas hydrate stability—a dynamic environment that may fluctuate as seafloor temperatures change. These communities were assessed in relation to their sediment environment to provide baseline data for these previously uninvestigated seeps and decipher the most significant variables structuring them. Specific environmental drivers investigated include sediment organic carbon, total nitrogen, C:N ratios, stable isotopes (δ¹³C and δ¹⁵N), redox potential, grain size, and porefluid chemistry. Macrofaunal community composition varied across locations separating into twelve distinct clusters. Several co-located cores clustered separately, indicating high heterogeneity in these communities at small spatial scales. Significant drivers of macrofauna communities included clay and sand content, C:N, δ¹⁵N values, organic carbon content, and depth. Functional trait composition was influenced by similar drivers, including depth, δ¹⁵N values, C:N, and sand content. Our results indicate similar environmental variables structure macrofaunal community composition and function across small- and large-scale gradients, contributing to our understanding of heterogeneity in local and regional factors that shape seep macrofaunal communities. This is the first investigation of macrofauna at these recently discovered seeps and provides baseline data on the hydrate stability zone for future comparisons, advancing our knowledge of broad-scale trends in seep macrofauna ecology.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104590"},"PeriodicalIF":2.1,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049312","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":"Phase transition and gas migration channels evolutions with methane hydrate system in porous media under dynamic leakage conditions","authors":"Hui Zhang ,&nbsp;Jing-Chun Feng ,&nbsp;Bin Wang ,&nbsp;Yongming Shen ,&nbsp;Si Zhang","doi":"10.1016/j.dsr.2025.104579","DOIUrl":"10.1016/j.dsr.2025.104579","url":null,"abstract":"<div><div>Methane, which is widely present in marine sediments, is not only a potential transitional energy source but also plays a critical role in the global carbon cycle. However, in–depth research on the hydrate phase transition and its effects in porous media under dynamic leakage conditions is still lacking. In this study, X-ray computed tomography was employed to capture the real–time three–dimensional structural evolution of hydrate phase transition. The results indicate that hydrate formation expands and stabilizes gas migration channels, increasing their volume to 6.9 times the original, while also enhancing structural complexity and system permeability. During hydrate dissociation, the combined effects of gravity and released gas and water altered the distribution of gas migration channels, reducing both their volume and permeability. On this basis, the ecological and environmental impacts of hydrate phase transition on the deep–sea methane seepage areas under dynamic seepage conditions were analyzed. Hydrate phase transition playing a crucial role in the biogeochemical processes and the evolution of benthic ecological communities in methane seepage areas. This study demonstrates the role of hydrate phase transitions in reshaping gas migration channels under dynamic leakage, with implications for ecological processes and hydrate resource development in marine sediments.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"225 ","pages":"Article 104579"},"PeriodicalIF":2.1,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266122","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 ecosystems of the North Atlantic Ocean: discovery, status, function and future challenges","authors":"A. Louise Allcock ,&nbsp;Diva J. Amon ,&nbsp;Amelia E.H. Bridges ,&nbsp;Ana Colaço ,&nbsp;Elva Escobar-Briones ,&nbsp;Ana Hilário ,&nbsp;Kerry L. Howell ,&nbsp;Nélia C. Mestre ,&nbsp;Frank E. Muller-Karger ,&nbsp;Imants G. Priede ,&nbsp;Paul V.R. Snelgrove ,&nbsp;Kathleen Sullivan Sealey ,&nbsp;Joana R. Xavier ,&nbsp;Anna M. Addamo ,&nbsp;Teresa Amaro ,&nbsp;Gayathra Bandara ,&nbsp;Narissa Bax ,&nbsp;Andreia Braga-Henriques ,&nbsp;Angelika Brandt ,&nbsp;Saskia Brix ,&nbsp;Nadescha Zwerschke","doi":"10.1016/j.dsr.2025.104580","DOIUrl":"10.1016/j.dsr.2025.104580","url":null,"abstract":"<div><div>The North Atlantic is an ocean basin with a diversity of deep-sea ecosystems. Here we provide a summary of the topography and oceanography of the North Atlantic including the Gulf of Mexico and Caribbean Sea, provide a brief overview of the history of scientific research therein, and review the current status of knowledge of each of 18 pelagic and benthic deep-sea ecosystems, with a particular focus on knowledge gaps. We analyse biodiversity data records across the North Atlantic and highlight spatial data gaps that could provide important foci for future expeditions. We note particular data gaps in EEZs of nations within and bordering the Caribbean Sea. Our data provide a baseline against which progress can be tracked into the future. We review human impacts caused by fishing, shipping, mineral extraction, introduction of substances, and climate change, and provide an overview of international, regional and national measures to protect ecosystems. We recommend that scientific research in the deep sea should focus on increasing knowledge of the distribution and the connectivity of key species and habitats, and increasing our understanding of the processes leading to the delivery of ecosystem services. These three pillars - distribution, connectivity, ecosystem function - will provide the knowledge required to implement conservation and management measures to ensure that any deep-sea development in the future is sustainable. Infrastructure and capacity are unevenly distributed and implementation of strategies that will lead to more equitable deep-sea science is required to ensure that essential science can be delivered.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"226 ","pages":"Article 104580"},"PeriodicalIF":2.1,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365510","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}