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Trophic relationship between mussels and scale worms under various seepage intensities in the haima cold seep: Insights from stable isotopes (δ13C and δ15N) and C:N:P stoichiometry Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-22 Zhixin Ke, Haochen Huang, Danting Chen, Yehui Tan
The deep-sea mussels (Mytilidae: Bathymodiolinae) usually contain one scale worm in their mantle cavity in the Haima cold seep, South China Sea. To explore their environmental adaptation and coexistence mechanisms, the stable isotopes (δC and δN) and C:N:P ecological stoichiometry of and the associated were investigated under different methane seepage intensities. In the presence of seepage, most mussels
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Short-terms variability of water properties and phytoplankton blooms along the central eastern Florida shelf edge Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-16 Mingshun Jiang, Gabriel Alsenas, Erick Busold, Stephanie Farrington, John Reed
The central eastern Florida shelf edge is a highly dynamic area that supports an important yet vulnerable deep-sea coral reefs ecosystem, the Oculina Coral Habitat Area of Particular Concern. Rapid and large short-terms (days to weeks) changes of bottom temperature (up to 9 °C) and CO (up to 180 μatm) were observed at the shelfbreak during a two-month (May 13-July 10, 2017) deployment of a lander package
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PresTo: A liquid-filled camera for low-cost imaging in the deep sea Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-16 Breanna E. Motsenbocker, Timothy J. Noyes, Alexandra T. Runyan, Russell Shomberg, Brennan T. Phillips
Deep-sea imaging systems are traditionally expensive to manufacture and are physically scaled depending on the operating depth of their housing and the internal camera/lens components. Liquid and epoxy filled instrument designs are increasing in popularity as a way to reduce the cost and size of deep-sea housings. Recent advances in 3D printing have facilitated rapid prototyping of these pressure tolerant
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Comparison of cephalopods eaten by sooty albatross Phoebetria fusca breeding in subtropical and subantarctic waters, and teuthofauna of the southern Indian Ocean Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-15 Yves Cherel, Colette Trouvé
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What inhabits the South Sandwich Islands deep-sea? Biodiversity and biogeography of bathyal communities using predators as biological samplers Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-11 José P. Queirós, José C. Xavier, José Abreu, Martin A. Collins, Mark Belchier, Philip R. Hollyman
The biodiversity of an ecosystem is crucial to determine its structure and resistance to climate change. The South Sandwich Islands (SSI) are located in the Scotia Sea (Southern Ocean), within the South Georgia and South Sandwich Islands Marine Protected Area. However, under a context of major changes in the Antarctic region due to climate change, the biodiversity of the archipelago remains poorly
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Another piece of the living fossil puzzle: A new species of Polymixia Lowe, 1836 (Polymixiiformes: Polymixiidae) from the western South Atlantic Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-08 Heloísa De Cia Caixeta, Claudio Oliveira, Marcelo Roberto Souto de Melo
The family Polymixiidae is an ancient group of acanthomorph fish, often regarded as living fossils. Currently, there are 11 valid species allocated in the genus , and commonly known as beardfish. All species are benthopelagic and can be found at depths between 80 and 800 meters, in the Atlantic, Indian, and Pacific oceans. Traditionally, only two species had been assigned to the Atlantic Ocean, , in
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Determination of vanadium redox species V(IV) and V(V) in seawater using chelating resin and inductively coupled plasma mass spectrometry Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-08 Erika Kurahashi, Sandra Poehle, Andrea Koschinsky
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The microbial lipid signature in sediments and chimneys within a back-arc basin hydrothermal system south of the Antarctic Polar Front Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-07 Maria T. Hernández-Sánchez, Laura Hepburn, Michael J. Stock, Douglas P. Connelly, Richard D. Pancost
The impact of hydrothermal systems on surrounding sedimentary microbial communities is not well understood and previous work has been limited to high temperature vent sites at slow or ultraslow spreading oceanic centres. To build on the current understanding of hydrothermal systems, we explore for the first time the organic geochemistry of the only known back-arc basin hydrothermal system outside the
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Response of ice krill (Euphausia crystallorophias) density to environmental changes in the Amundsen Sea Coastal Polynya, Antarctica Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-05 Jialiang Yang, Shuai Li, Lingzhi Li, Xin Rao, Shuai Chen, Hongliang Huang
The density of ice krill (), a species of key ecological value, and related environmental factors were observed along two transects in the Amundsen Sea Coastal Polynya (ASCP) in Antarctica. The distribution of ice krill was processed using two-frequency acoustic backscatter data identification, and the target strength of ice krill was calculated via stochastic distorted-wave born approximation based
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Estimating daily subsurface thermohaline structure from satellite data: A deep network with embedded empirical orthogonal functions Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-02-01 Hengqian Yan, Ren Zhang, Huizan Wang, Senliang Bao, Yongchui Zhang, Mei Hong
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Characteristics of thermohaline staircases in the Southeast Caribbean sea revealed by seismic reflection data Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-24 Mengli Liu, Haibin Song, Kun Zhang, Shun Yang, Linghan Meng
Seismic oceanography, characterized by its high horizontal resolution and large imaging coverage, can be used to directly measure the horizontal extension of the thermohaline staircase. This study presents an investigation into the seismic reflection imaging of thermohaline staircases located in the Southeast Caribbean Sea. The findings indicate clear interactions between the staircases and various
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Mixed layer heat budget in the Mozambique channel: Interannual variability and influence of Rossby waves Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-24 D. Mawren, J. Hermes, C.J.C. Reason
The evolution of the mixed layer temperature anomalies in the Mozambique Channel is analysed using a mixed layer heat budget covering sub-seasonal to interannual time scales. Sub-seasonal variations in mixed layer temperature are largely dominated by surface heat fluxes, except along the southern coast of Mozambique and Madagascar, where both the advection and the residual terms become significant
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Bioturbation and faunal-mediated ecosystem functioning in a deep-sea benthic community recovering from a severe seabed disturbance Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-15 Rachel Hale, Katharine T. Bigham, Ashley A. Rowden, Jane Halliday, Scott D. Nodder, Alan R. Orpin, Grace Frontin-Rollet, Katherine L. Maier, Joshu J. Mountjoy, Matthew H. Pinkerton
Kaikōura Canyon, offshore Aotearoa/New Zealand, is a hotspot for deep-sea benthic biology with globally high faunal abundance. The Mw7.8 Kaikōura earthquake in 2016 triggered a severe disturbance that reshaped the canyon, evacuating an estimated 850 metric megatonnes of sedimentary material down canyon. The Kaikōura Canyon habitat is now recovering from this removal of both seafloor substrate and associated
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Biogeochemical cycling of halogenated organic compounds in the ocean: Current progress and future directions Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-19 Yuheng Liu, Li Wang, Rulong Liu, Jiasong Fang
Halogenated Organic Compounds (HOCs) are a class of refractory organic compounds produced in large quantities in the ocean, and some compounds can even persist over millions of years. The processes of production, transportation, and burial of HOCs, as well as the transformation and degradation of these compounds by microorganisms, are important parts of the biogeochemical cycling of carbon and halogen
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On the magnetic field induced by swell in inhomogeneous seawater Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-19 Hongjuan Zhou, Ronghuan Song, Tao Jin, Zhiquan Zhou, Fenggang Yan
The magnetic field induced by ocean swell moving in the geomagnetic field is an important electromagnetic noise in the ocean environment for magnetic anomaly detection, and it is calculated in this work accounting into the fact that the conductivities of the ocean are inhomogeneous vertically, which is ignored in the former works, and the results are verified by comparing with those obtained by the
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Novel insights into deep-sea hydrothermal vent and cold seep adaptation inferred from comparative transcriptome analysis of a munidopsid squat lobster distributed in both environments Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-18 Jiao Cheng, Han Yan, Min Hui, Zhongli Sha
Oases of life around deep-sea hydrothermal vents and cold seeps have revolutionized our perception of the deep sea. A growing understanding of adaptive strategies for macrofauna living in deep-sea extreme environments has been accompanied by a parallel realization that the species distributed in different types of deep-sea chemosynthetic ecosystems likely require specific adaptation to their respective
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Diurnal to interannual variability in the Northeast Atlantic from hydrographic transects and fixed time-series across the Rockall Trough Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-14 Eoghan Daly, Glenn Nolan, Alan Berry, Janina V. Büscher, Rachel R. Cave, Levke Caesar, Margot Cronin, Sheena Fennell, Kieran Lyons, Aedín McAleer, Gerard D. McCarthy, Evin McGovern, Joseph V. McGovern, Triona McGrath, Garvan O'Donnell, Diego Pereiro, Rob Thomas, Louise Vaughan, Martin White, Caroline Cusack
The southern entrance to the Rockall Trough is subject to a complex set of dynamic processes, influenced by Atlantic gyre interactions, the North Atlantic Current, slope boundary currents, variable wind stress forcing, mesoscale activity, and a changing supply of modified water masses formed elsewhere in the Atlantic. These processes drive large temporal and spatial variations, and mixing of surface
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Inferring benthic megafaunal sediment reworking activity in relation to bottom water oxygen in Barkley Canyon, NE Pacific from video and acoustic imaging analysis Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-11 Alessia C. Ciraolo, Paul V.R. Snelgrove, Douglas Schillinger, Fabio C. De Leo
Sediment reworking activity influences benthic functioning expressed as nutrient fluxes and carbon cycling. Multiple studies have addressed sediment reworking based on observations from individual instrument types (e.g., video camera, side-scan sonar, multibeam), but none have considered reworking based on two or more complementary instruments. We therefore analyzed deep-sea megafaunal and reworked
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Living benthic foraminifera from Almirante Câmara and Grussaí canyons and adjacent slope areas (Campos Basin, Southwest Atlantic): Response to trophic and hydrodynamic conditions Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-09 Silvia Helena Mello Sousa, Cintia Yamashita, Thaisa Marques Vicente, Rafaela Nogueira Mendonça Mendes, Laetitia Licari, Maria Virgínia Alves Martins, Bianca Sung Mi Kim, Christian Millo, Renato Carreira, Isabel Montoya-Montes, Michael A. Kaminski, Michel Michaelovitch Mahiques
Living (rose Bengal stained) benthic foraminiferal faunas, grain size, geochemical parameters (total organic matter, chlorophyll-a, pheophytin-a, molecular markers, and vertical flux of particulate organic matter) were investigated in 14 stations in two submarine canyons Almirante Câmara and Grussaí considered mature and immature, respectively, and on the adjacent continental slope, from 400 to 1300 m
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A new deep-sea species of golden gorgonian (Octocorallia: Scleralcyonacea: Chrysogorgiidae) from Antarctic waters Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-06 Patricia Baena, Luis Martell, Joan J. Soto-Angel, Stefano Ambroso, Pablo J. López-González
The Southern Ocean harbours rich deep-sea ecosystems with local hotspots of benthic biodiversity. Still, many species, including deep-water octocorals, remain undescribed despite the fact that the exploration of the deep-sea has improved thanks to recent technological advances. In this context, a new species of golden gorgonian has been collected at 1407–1581 m depth during a recent cruise to Dronning
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Parasite assemblages of lanternfishes (Myctophidae) in deep subantarctic waters: Potential indicators for ecosystem monitoring Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-06 Juan T. Timi, Claudio Buratti, Paola E. Braicovich, Manuel M. Irigoitia, Ana L. Lanfranchi, Marialetizia Palomba, Manuela Parietti, Simonetta Mattiucci
The Agujero Azul (Blue Hole) is an oceanic region located on the edge of the Southwestern Atlantic continental shelf that is especially impacted by intense fishing activity. It harbours a high biodiversity, including the mesopelagic lanternfishes of the numerically abundant family Myctophidae. Due to their high abundance and relevance in food webs, monitoring changes in the population and community
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Phytoplankton distribution under late summer conditions in the Algerian Basin during SOMBA cruise (2014): A chemotaxonomic approach Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-05 Malik Aït-Kaci, Ferial Louanchi, Mehdia-Asma Keraghel, Romaissa Harid, Mohamed Zerrouki, Laurent Mortier
Marine phytoplankton forms the basis of the marine food web. Its diversity (size and pigmentation) has a significant impact on biogeochemical processes such as photosynthetic efficiency, trophic interactions, and global carbon fluxes. To date, little is known about the Algerian Basin regarding phytoplankton quality and quantity. In this study, we analyzed the distribution of phytoplankton communities
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Wooden steps to shallow depths: A new bathymodiolin mussel, Vadumodiolus teredinicola, inhabits shipworm burrows in an ancient submarine forest Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2024-01-02 Marvin A. Altamia, Hannah J. Appiah-Madson, Falco Poulin, Bruno Huettel, Maxim Rubin-Blum, Nicole Dubilier, Harald R. Gruber-Vodicka, Nikolaus Leisch, Daniel L. Distel
Large mussels of the mytilid subfamily Bathymodiolinae are common inhabitants of deep-sea hydrothermal vents and cold seeps, where gill-borne symbionts allow them to utilize energy-rich compounds such as hydrogen sulfide and methane to support abundant growth. This subfamily also includes smaller symbiont-bearing mussels found on deep-sea wood and organic deposits. Phylogenetic analyses suggest that
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Controls on long-term changes in bathyal bivalve biomass: The Pleistocene glacial–interglacial record in the eastern Mediterranean Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-27 Antonia Porz, Martin Zuschin, Luke Strotz, Efterpi Koskeridou, Kobe Simoens, Renata Lukić, Danae Thivaiou, Frédéric Quillévéré, Konstantina Agiadi
The biomass of aquatic organisms largely determines the mass and energy flow within an ecosystem, but the long-term impact of environmental change on biomass is not well constrained for a number of clades. Here, we test the hypothesis that bivalve biomass is negatively impacted by warming climate over time. This study is based on a fossil marine bivalve fauna recovered from hemipelagic sediments deposited
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Mesoscale activity in the northeastern pacific water mass convergence region and its influence on fish larvae distribution by development stages (October 2022) Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-30 Emmanuel Romero, Laura Sánchez-Velasco, Leonardo Tenorio-Fernandez, Sylvia P.A. Jiménez-Rosenberg, Amelia Sánchez-Pérez, Manuel Fundora-Pozo, E. Beier
Based on satellite, hydrographic, and zooplankton data, the mesoscale activity, and its effect on the three-dimensional distribution of fish larvae in the northeastern Pacific water mass convergence region off Mexico during October 2022 were analyzed. Three eddies were observed during the cruise, but two were measured. An anticyclonic eddy (not crossed by the cruise) was observed by satellite data
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Generation of internal solitary waves by the Mackenzie River plume in the coastal Arctic Ocean Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-30 Wenjia Min, Qun Li, Zhiliang Liu, Bo Zhao
High-resolution spaceborne synthetic aperture radar (SAR) images have verified the wide existence of internal solitary waves (ISWs) over the Chukchi and Beaufort Seas. A major ISW generation hotspot has been observed at the mouth of the Mackenzie River. Considering the weak tidal currents and relatively flat topography of the Mackenzie Shelf, such ISWs are unlikely to be generated by tide–topography
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Dynamic characteristics of two-vent submarine hydrothermal plumes: A case study of Longqi hydrothermal field Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-29 Weichang Zhou, Sheng Chen, Junyi Yang
Submarine hydrothermal plumes play an important role in the process of material and energy exchange in the deep sea. Due to the influence of complex environmental factors (multiple vents, deep-sea stratified environment) and the limitation of observation capabilities, the dynamic characteristics of submarine hydrothermal plumes have not been fully understood, and it is urgent to study the diffusion
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Comparative analysis of day and night micronekton abundance estimates in west Pacific between acoustic and trawl surveys Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-29 Laure Barbin, Anne Lebourges-Dhaussy, Valérie Allain, Aurore Receveur, Patrick Lehodey, Jérémie Habasque, Elodie Vourey, Annie Portal, Gildas Roudaut, Christophe Menkes
Micronekton organisms are a central component of the trophic organization in the pelagic ecosystem, being prey to top predators and participating in the export of carbon from the surface to the deep layers. Despite their importance, the abundance estimates and species distribution of micronekton remain largely uncertain. This study aimed to compare and assess two sampling methods classically used for
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Deep propagation of wind-generated near-inertial waves in the Northern South China Sea Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-29 Zifei Chen, Zhiwu Chen, Fei Yu, Ren Qiang, Xingchuan Liu, Feng Nan, Jianfeng Wang, Guangcheng Si, Yibo Hu
Using a subsurface mooring deployed at a depth of ∼2290 m in the northern South China Sea, the characteristics of deep-propagating near-inertial waves (NIWs) (>1500 m) generated by a combination of a winter storm and a typhoon were examined. The NIWs had a large vertical wavelength and showed a high coherence in near-full water depth. Correspondingly, the strong vertical shear and energy of the NIWs
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Geochemical insights into secular changes in the depositional environment of ferromanganese nodules in the western North Pacific Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-27 Kentaro Nakamura, Koichi Horinouchi, Ryo Shimomura, Shiki Machida, Kazutaka Yasukawa, Koichiro Fujinaga, Tatsuo Nozaki, Yasuhiro Kato
Understanding Earth's surface dynamics and biological evolution requires deciphering past marine environmental changes. Hydrogenetic ferromanganese nodules formed by the direct precipitation of Fe–Mn oxide/hydroxide from seawater could record the marine environment at the time of deposition, as in the case of ferromanganese crusts. In this study, petrological and geochemical analyses were conducted
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A novel approach for improving the spatiotemporal distribution modeling of marine benthic species by coupling a new GIS procedure with machine learning Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-26 Iván.F. Benavides-Martínez, Mario Rueda, Olimpo Ortíz, Javier Díaz-Ochoa, Sergio Castillo-Vargasmachuca, John Josephraj Selvaraj
In this study we developed and validated a new integrative method for constructing and assessing Species Distribution Models (SDMs) for marine benthic species across spatial and temporal scales. This methodology synthesizes four dimensions-latitude, longitude, depth and time-into a unified predictive output, achieved by integrating a novel GIS tool, Bathymetric Projection (BP) with machine learning
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Fish assemblages along a bathymetric gradient in the northern Aegean Sea: An ecomorphological approach Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-23 A. Orfanidis Georgios, Konstantinos Touloumis, Emmanouil Koutrakis, Athanasios C. Tsikliras
Morphological studies of fish assemblages are a crucial aspect of ecology, as they can provide insight into functional roles and changes beyond taxonomically oriented approaches. In addition, depth is an important factor that impacts the structure of fish assemblages. In the present study, samples of 115 demersal actinopterygian species were collected during a bottom-trawl survey conducted in the northern
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Sensitivity of the thermohaline circulation during the Messinian: Toward constraining the dynamics of Mediterranean deoxygenation Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-21 A.M. Mancini, R. Gennari, F. Lozar, M. Natalicchio, G. Della Porta, D. Bernasconi, L. Pellegrino, F. Dela Pierre, L. Martire, A. Negri
During the Messinian, the sensitivity of the Mediterranean Basin to ecosystem perturbation was enhanced in response to the progressive restriction of water exchange with the Atlantic Ocean. The widespread deposition of organic-rich layers (i.e. sapropel) during the Messinian testifies the perturbation of the carbon and oxygen cycles; indeed, these sediments were deposited under conditions of oxygen
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Interannual variability of the South Atlantic subtropical mode water: Investigating the early aughts shift and its relationship to ENSO modulations Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-16 Daniel M.C. Santos, Piero S. Bernardo, Paulo S. Polito, Olga T. Sato
The South Atlantic Subtropical Mode Water (SASTMW) is a conspicuous volume of wa-ter formed during winter and early spring that occupies the mid-latitudes of the South Atlantic. Here, we aim to investigate the interannual variability of the SASTMW's volume in response to remote processes influenced by atmospheric teleconnection. We utilized the Simple Ocean Data Assimilation (SODA) ocean reanalysis
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Influence of rossby wave in southern Indian Ocean on the low frequency variability of eddy kinetic energy within agulhas current system Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-17 Tianyu Wang, Yan Du, Xiaomei Liao, Runjie Zhou, Ogooluwa Samuel Adeagbo
The basin-scale wave propagation in the Southern Indian Ocean (SIO) is inferred to affect the low-frequency variability of eddy kinetic energy (EKE) within the Agulhas current system (ACS). Observations and numerical simulations indicate that westward-propagating waves, in the form of sea level variability from the east boundary, may cause “non-linear” oceanic responses (e.g., sea level and EKE) in
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Different responses of plankton community to mesoscale eddies in the western equatorial Pacific Ocean Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-14 Lina An, Xin Liu, Feipeng Xu, Xinyu Fan, Peixuan Wang, Wenfeng Yin, Bangqin Huang
The western equatorial Pacific Ocean exhibits a complex pattern of currents and mesoscale eddies. However, the impacts of dynamic hydrological systems on plankton community remain uncertain due to the low resolution of field observation. In this study, we conducted a comparative study involving regional high-resolution field observations, satellite observations, and the numerical model. Our aim was
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Morphology of sulfide structures in the active hydrothermal fields of Indian Ocean ridges and its geological implications Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-10 Jin Liang, Chunhui Tao, Jonguk Kim, Xiaohe Liu, Nannan Wang, Mingxu Wang
The Indian Ocean ridges are shaped like the Greek letter lambda (i.e., λ), and are up to approximately 18,000 km in length with various full spreading rates (<12–80 mm/yr) including the Carlsberg, Central, Southeast, and Southwest Indian Ridges. To date, in total of 15 active hydrothermal fields have been reported at these ridges with varying intensities of activity, but the distribution and morphology
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A new subsurface precursor across the spring predictability barrier for the ENSO prediction Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-05 Zhixiang Zhang, Jianing Wang, Fan Wang
Despite decades of research on forecasting the El Niño–Southern Oscillation (ENSO) in the past decades, skillfully predicting the ENSO across the spring predictability barrier remains challenging. In this study, we utilize the ensemble of four model products to identify a new subsurface precursor consisting of the anomalous equatorial zonal velocity over 180°–150°W and 140–180 m and potential temperature
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Spies of the deep: An animal-borne active sonar and bioluminescence tag to characterise mesopelagic prey size and behaviour in distinct oceanographic domains Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-12-06 Mathilde Chevallay, Tiphaine Jeanniard du Dot, Pauline Goulet, Nadège Fonvieille, Cassandra Craig, Baptiste Picard, Christophe Guinet
Mesopelagic fishes, a central component of marine trophic networks, play a fundamental role in marine ecosystems. However, as they live in highly inaccessible environments, little information is currently available on their distribution and abundance. The emergence of biologging technologies has made it possible to use deep-diving predators as bio-samplers of their environment in under-sampled regions
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Feature-oriented reconstruction of vertical temperature profile: A feasibility study in the Northwest Pacific Ocean Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-27 Chen Wang, Changyuan Chen, Huimin Li, Yijun He
The Northwest Pacific is an area rich in oceanic frontal system that influences regional circulation patterns, heat transport, and biogeochemical processes. Understanding the three-dimensional thermal structure of the western subarctic front is essential for studying its dynamics and climate implications. In this study, we developed an empirical feature model to reconstruct the thermal structure of
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Description of the fifth sea pen species that attaches to hard substrates by modifying its peduncle Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-29 Yuka Kushida, Hiroki Kise, Akira Iguchi, Yoshihiro Fujiwara, Shinji Tsuchida
Almost all sea pens inhabit soft bottoms, but only four species are known to live on rocky substrates. These are all deep-sea species with specialized sucker-like peduncles considered to attach to rocky substrates. Their known distribution is very sparse due to the limited number of reports. In this study, we describe a novel rock-inhabiting sea pen, Anthoptilum gnome sp. nov., from a deep-sea marine
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Sponge assemblages in fishing grounds and seamounts of the Balearic Islands (western Mediterranean) Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-29 Julio A. Díaz, Francesc Ordinas, M. Teresa Farriols, Camilo Melo-Aguilar, Enric Massutí
The Balearic Archipelago (western Mediterranean) is an area of great ecological interest due to the combination of complex geomorphology, highly oligotrophic waters and low fishing pressure. Sponges play a key role in benthic habitats, providing structural complexity and significantly contributing to their diversity and biomass. Here, we present an insight into the sponge communities of this archipelago
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Spatial, temporal, and demographic variability in patagonian toothfish (Dissostichus eleginoides) spawning from twenty-five years of fishery data at South Georgia Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-22 C.C.G. Bamford, P.R. Hollyman, J. Abreu, C. Darby, M.A. Collins
Patagonian toothfish (Dissostichus eleginoides) are a commercially important species that support a longline fishery at the subantarctic island of South Georgia (CCAMLR Subarea 48.3). Understanding the life history of Patagonian toothfish is key to the successful management and sustainability of this fishery. Using catch data from the past 25-years, 1997 to 2021, we provide an updated assessment of
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Mechanisms of a shelf submesoscale front in the northern South China Sea Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-17 Chunhua Qiu, Benjun He, Dongxiao Wang, Zhongshui Zou, Haibo Tang
Ocean fronts are important dynamic processes that occur at various scales. Submesoscale fronts (Rossby number, Ro≈1) associated with strong vertical velocity easily induce high chlorophyll-a concentrations within the upper ocean. However, direct observations of the submesoscale front in the shelf of northern South China Sea are scare, and the dynamic process of submesoscale front is still unclear.
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Multiscale spatial patterns and environmental drivers of seamount and island slope megafaunal assemblages along the Mozambique channel Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-19 Mélissa Hanafi-Portier, Sarah Samadi, Laure Corbari, Marion Boulard, Elda Miramontes, Pierrick Penven, Boris Leroy, Thibault Napoléon, Stéphan J. Jorry, Karine Olu
Seamounts are vulnerable ecosystems targeted by fishing and potentially by future mineral exploitation. Their abundance, widespread distribution, and heterogeneity of faunal and abiotic components require integrated studies at multiscale to describe spatial patterns and identify environmental drivers needed by conservation plans. There is also a lack of knowledge on seamount benthic ecosystems in some
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Studying the effect of camera tag associated white light on the diving and foraging behavior of Eastern Caribbean sperm whales Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-19 Pernille Tønnesen, Shane Gero
Studying the behavior of animals roaming the deep-sea is challenging and is driven by technological developments. The next step to further understand the interactions between predators and prey in the deep sea may be aided by animal-borne camera tags. However, in the darkness of the deep sea, obtaining useful footage requires a light source, which may affect the animal carrying the tag as well as other
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Fine-scale spatial patterns of deep-sea epibenthic fauna in the Laurentian Channel Marine Protected area Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-17 Sarah N. de Mendonça, Anna Metaxas
Ecological processes at local to global scales impact spatial patterns in abundance and distribution of megafauna. Fine-scale patterns have rarely been investigated through explicitly spatial analytical methods in the deep sea and have been assumed random, uniform, or similar to neighbouring areas. We used spatial statistics (Moran's I, Gi*, and local Moran's I) to identify significant megafaunal patterns
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Digestive system and feeding of deep-sea acorn worm Quatuoralisia malakhovi (Enteropneusta: Torquaratoridae) from the Bering sea Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-17 Olga Vladimirovna Ezhova, Maria Andreevna Trukhan, Anastasiya Ivanovna Lukinykh, Sergey Vladimirovich Galkin, Andrey Viktorovich Gebruk, Dimitry Mikhailovich Schepetov, Alexei Vladimirovich Tiunov, Oksana Leonidovna Rozanova, Anton Alexandrovich Georgiev, Vladimir Vasilievich Malakhov
We studied the structure of digestive system of deep-sea torquaratorid Quatuoralisia malakhovi including the food-obtaining apparatus, microanatomy of all regions of digestive tract, and fine structure of various regions of the gut. The mouth of Q. malakhovi is surrounded by two symmetrical triangular lateral collar lips and one midventral collar lip, which may retract into the mouth. The ventral ciliary
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Pore water pressure maintaining sampler for deployment on deep-sea ROV-Jellyfish Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-17 Ying Wang, Jin Guo, Xinghui Tan, Jiawang Chen, Yuping Fang, Wei Wang, Yongqiang Ge
Obtaining high-quality pore water samples is of great importance for marine resource investigations. We describe a deep-sea in-situ pore-water pressure-maintaining sampler aboard the heavy-duty ROV-Jellyfish. It can operate at water depths up to 3000 m and acquire 24 different pore-water pressure-holding samples of seafloor sediments with a sampling depth resolution of 2 cm. In this study, the working
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Deep-sea macrofauna community recovery in Kaikōura canyon following an earthquake-triggered turbidity flow Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-14 Katharine T. Bigham, Ashley A. Rowden, Daniel Leduc, David A. Bowden, Scott D. Nodder, Alan R. Orpin, Jane Halliday
Sediment density flows can transport massive amounts of sediment across large distances and can have dramatic, long-lasting impacts on deep-sea benthic communities. A canyon-flushing event in Kaikōura Canyon, New Zealand, triggered by the 2016 Mw 7.8 Kaikōura Earthquake, which included significant submarine mass wasting, debris and turbidity flows, provides an excellent opportunity to investigate the
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Morphological characteristics, molecular species validation and spatio-temporal distribution of myctophid eggs off the Pacific coast of northeastern Japan Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-11-10 Chiyuki Sassa, Yuya Suzuki, Taichiro Toyama, Mami Saito
Myctophids in the world's oceans have a huge biomass and act as an important link between secondary producers and upper trophic levels through their extensive diel vertical migrations from the epipelagic to mesopelagic layers. Dominance of myctophid larvae in oceanic ichthyoplankton has been reported from various parts of the major oceans; however, there are few records concerning their eggs. We established
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Properties of Antarctic Bottom Water in the Western Gap (Azores-Gibraltar Fracture Zone, Northeast Atlantic) in 2021 Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-10-30 Viktor A. Krechik, Maria V. Kapustina, Dmitry I. Frey, Nadezhda V. Dvoeglazova, Alexandra A. Muratova, Leyla D. Bashirova, Evgenia V. Dorokhova, Eugene G. Morozov
We present the results of measurements of thermohaline and dynamical structures, as well as hydrochemical parameters of near-bottom water in the Western Gap (Azores-Gibraltar Fracture Zone, Northeast Atlantic). The data were collected during cruise 59 of the research vessel Akademik Ioffe in October 2021. The results of the analysis showed that water with potential temperatures lower than 2.00 °C had
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Phytoplankton carbon biomass: Insights from the eastern Indian Ocean Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-10-30 Shujin Guo, Feng Wang, Junhua Liang, Kangning Zhang, Xiaoxia Sun
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Estimation of the barrier layer thickness in the Indian Ocean based on hybrid neural network model Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-10-18 Yizhi Zhao, Jifeng Qi, Shanliang Zhu, Wentao Jia, Xiang Gong, Wenming Yin, Baoshu Yin
Accurately and effectively estimating of the barrier layer thickness (BLT) is essential for the research of ocean thermodynamics, ocean dynamics, and air-sea interaction. Artificial intelligence model provides an effective means for accurately estimating BLT from sea surface and gridded Argo data. The present study focuses on the application of a hybrid particle swarm optimization-based artificial
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Environmental factors influencing the benthic ecology of the deep Eastern Mediterranean Sea – A review Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-10-14 Anastasios Tselepides, Katerina Sevastou, Nikolaos Lampadariou
During the last 30 years the deep Eastern Mediterranean Sea has been the focus of a number of oceanographic studies funded either from the EU and/or from various national research initiatives. In this review we attempt to summarise some of the major outcomes of this research regarding the environmental factors that influence its deep benthic communities. Benthic components such as microbiota, meiofauna
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Detection of materially coherent eddies from satellite altimetry in the Bay of Bengal Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-10-14 Lijin Jayan, M. Jishad, Neeraj Agarwal, Rashmi Sharma, Manikandan Mathur
Mesoscale eddies are a well-recognized feature of the global oceans, being of dynamical relevance to various ocean processes and of significance to transport of various species. In the last few decades, advancements in satellite observations of the sea surface have revealed mesoscale and sub-mesoscale eddy features in many parts of the ocean. An objective definition and detection of eddies has, however
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Variability of non-breaking surface-wave induced mixing and its effects on ocean thermodynamical structure in the northwest Pacific during Typhoon Lekima (2019) Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-10-14 Zhanpeng Zhuang, Yongzeng Yang, Qi Shu, Zhenya Song, Biao Zhao, Yeli Yuan
The surface waves, which contain most of the mechanical energy in the upper ocean, greatly contribute to the vertical mixing processes. Two of the non-breaking wave-induced physical processes, including wave-generated turbulence and residue of wave transport flux, are introduced as two mixing schemes, and incorporated into the ocean circulation model to study the effects on the upper ocean during the
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Notes on the results of two dives in the Puerto Rico Trench by the bathyscaphe Archimède Deep Sea Res. Part I Oceanogr. Res. Pap. (IF 2.4) Pub Date : 2023-10-13 Jean-Marie Pérès
Two dives, to depths of 7,300 m and 3,100 m, were performed on the southern side of the Puerto-Rico Trench, chiefly for biological observations. The deposition of organic material was more considerable at 7,300 m (where a process of decantation seems to occur) than at 3,100 m. Limestone flags observed at 3,100 m showed signs of active recent erosion. Plankton study is made difficult, when the bathyscaphe