Genome Evolution in Bacteria Isolated from Million-Year-Old Subseafloor Sediment by William D. Orsi, Tobias Magritsch, Sergio Vargas, Ömer K. Coskun, Aurele Vuillemin, Sebastian Höhna, Gert Wörheide, Steven D’Hondt, B. Jesse Shapiro, Paul Carini

“…Our findings demonstrate that genomes of cultivated bacterial strains from the genus Thalassospira isolated from million-year-old abyssal sediment exhibit greatly reduced levels of homologous recombination, elevated numbers of pseudogenes, and genome-wide evidence of relaxed purifying selection. …”
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Fractionation of 226Ra and Ba in the Upper North Pacific Ocean by Pieter van Beek, Roger François, Makio Honda, Matthew A. Charette, Jean-Louis Reyss, Raja Ganeshram, Christophe Monnin, Susumu Honjo

“…This finding has implications for dating of marine carbonates by 226Ra, which requires a constant initial 226Ra/Ba ratio incorporated in the shells and for using 226Ra as an abyssal circulation and mixing tracer.…”
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Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean by G. Dulaquais, M. Boye, M. J. A. Rijkenberg, X. Carton

“…In the Antarctic Bottom Waters, the enrichment in <i>D</i>Co with aging of the water mass can be related to suspension and redissolution of bottom sediments a well as diffusion of <i>D</i>Co from abyssal sediments. Mixing and dilution of deep water masses, rather than scavenging of <i>D</i>Co onto settling particles, generated the meridional decrease of <i>D</i>Co along the southward large-scale circulation in the deep western Atlantic. …”
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Assessment of the bacterial community structure in shallow and deep sediments of the Perdido Fold Belt region in the Gulf of Mexico by Ma. Fernanda Sánchez-Soto Jiménez, Daniel Cerqueda-García, Jorge L. Montero-Muñoz, Ma. Leopoldina Aguirre-Macedo, José Q. García-Maldonado

“…Additionally, the shallow sites plotted further from each other on the NMDS whereas samples from the deeper sites (abyssal plains) plotted much more closely to each other. …”
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Deep-Sea Carnivorous Sponges From the Mariana Islands by Jon Thomassen Hestetun, Hans Tore Rapp, Hans Tore Rapp, Shirley Pomponi

“…Here, we provide formal descriptions of eight cladorhizid sponge species from 1229 to 5813 m depth collected as part of the NOAA 2016 Deepwater Exploration of the Marianas with the NOAA ship Okeanos Explorer (EX1605) during the investigation of the bathyal and abyssal seafloor off the Northern Mariana Islands and Guam: the harp sponge Chondrocladia (Symmetrocladia) lyra, Chondrocladia (Chondrocladia) coronata sp. nov., Lycopodina subtile sp. nov., Abyssocladia fryerae sp. nov., Abyssocladia kellyae sp. nov., Abyssocladia marianensis sp. nov., Abyssocladia stegosaurensis sp. nov., and Abyssocladia villosa sp. nov. …”
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Covariation of Deep Antarctic Pacific Oxygenation and Atmospheric CO2 during the Last 770 kyr by Zheng Tang, Tiegang Li, Zhifang Xiong, Haowen Dang, Jingteng Guo

“…Observed variations in the degree of deep oxygenation and “organic carbon pump” efficiency in the central AZ might be driven primarily by physical “ventilation” processes (i.e., overturning circulation, mixing, and/or air–sea gas exchange). Our records of abyssal oxygenation in the central AZ, which vary in concert with atmospheric CO2 levels over the last several G–IG cycles, provide strong evidence that SO ventilation plays a significant role in controlling variations in both the amount of respired carbon sequestered in the deep ocean and atmospheric CO2 concentrations on G–IG timescales. …”
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Diverse Genomic Traits Differentiate Sinking-Particle-Associated versus Free-Living Microbes throughout the Oligotrophic Open Ocean Water Column by Andy O. Leu, John M. Eppley, Andrew Burger, Edward F. DeLong

“…Shallow-water particle-associated microbes had elevated genomic GC content and proteome nitrogen content and reduced proteome carbon content in comparison to abyssal particle-associated microbes. An inverse trend was observed for their sympatric free-living counterparts. …”
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The marine biogeochemistry of dissolved and colloidal iron by Fitzsimmons, Jessica Nicole

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An Assessment of Environmental Metabarcoding Protocols Aiming at Favoring Contemporary Biodiversity in Inventories of Deep-Sea Communities by Miriam I. Brandt, Blandine Trouche, Nicolas Henry, Nicolas Henry, Cathy Liautard-Haag, Lois Maignien, Colomban de Vargas, Colomban de Vargas, Patrick Wincker, Patrick Wincker, Julie Poulain, Julie Poulain, Daniela Zeppilli, Sophie Arnaud-Haond

“…The abyssal seafloor covers more than 50% of planet Earth and is a large reservoir of still mostly undescribed biodiversity. …”
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Patterns of Macrofaunal Biodiversity Across the Clarion-Clipperton Zone: An Area Targeted for Seabed Mining by Travis W. Washburn, Lenaick Menot, Paulo Bonifácio, Ellen Pape, Magdalena Błażewicz, Guadalupe Bribiesca-Contreras, Thomas G. Dahlgren, Thomas G. Dahlgren, Tomohiko Fukushima, Adrian G. Glover, Se Jong Ju, Stefanie Kaiser, Ok Hwan Yu, Craig R. Smith

“…Macrofauna are an abundant and diverse component of abyssal benthic communities and are likely to be heavily impacted by polymetallic nodule mining in the Clarion-Clipperton Zone (CCZ). …”
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Petrogenesis of the Khaku pegmatites corundum-bearing in the margin of Alvand granite complex, and its comparison with important worldwide ruby and sapphire deposits by Hadis Sadeghi, Shahryar Mahmoudi, Mohammad Reza Jafari, Mohammad Ali Arian

“…This classification has 4 main categories or classes including 2 Abyssal classes (high grade, high pressure to low), Muscovite (high pressure, low temperature), and Miarolitic (shallow level of rare element with low temperature and pressure). …”
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A physically based framework for modeling the organic fractionation of sea spray aerosol from bubble film Langmuir equilibria by S. M. Burrows, O. Ogunro, A. A. Frossard, L. M. Russell, P. J. Rasch, S. M. Elliott

“…The classes include a lipid-like mixture associated with labile dissolved organic carbon (DOC), a polysaccharide-like mixture associated primarily with semilabile DOC, a protein-like mixture with concentrations intermediate between lipids and polysaccharides, a processed mixture associated with recalcitrant surface DOC, and a deep abyssal humic-like mixture. <br><br> Box model calculations have been performed for several cases of organic adsorption to illustrate the underlying concepts. …”
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Structure of pine stands in the area of amber production at the North-Eastern part of the West Polissya by Leonid Kopiy, Yulian Kahaniak, Serhiy Kopiy, Vitalii Suhovych, Maria Kopiy, Igor Fizyk

“…The extraction of minerals by using of powerful water pumps leads to a significant disturbance of the terrain, the formation of significant abysses, intra-soil voids, which creates significant threats for forestry activities. …”
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Inputs and processes affecting the distribution of particulate iron in the North Atlantic along the GEOVIDE (GEOTRACES GA01) section by A. Gourain, A. Gourain, H. Planquette, M. Cheize, M. Cheize, N. Lemaitre, N. Lemaitre, J.-L. Menzel Barraqueta, J.-L. Menzel Barraqueta, R. Shelley, R. Shelley, P. Lherminier, G. Sarthou

“…</p> <p>Within the Iberian Abyssal Plain, the ratio of PFe to PAl was identical to the continental crust molar ratio (0.21&thinsp;mol&thinsp;mol<span class="inline-formula">⁻¹</span>), indicating the important influence of crustal particles in the water column. …”
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Plateaus and jumps in the atmospheric radiocarbon record – potential origin and value as global age markers for glacial-to-deglacial paleoceanography, a synthesis by M. Sarnthein, K. Küssner, P. M. Grootes, B. Ausin, B. Ausin, T. Eglinton, J. Muglia, R. Muscheler, G. Schlolaut

“…Like today, Atlantic deep-water formation went along with an estuarine inflow of old abyssal waters from the Southern Ocean up to the northern North Pacific and an outflow of upper deep waters. …”
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TECTONIC POSITION OF MINGLING DYKES IN ACCRETION-COLLISION SYSTEM OF EARLY CALEDONIDES OF WEST SANGILEN (SOUTH-EAST TUVA, RUSSIA) by Irina V. Karmysheva, Vladimir G. Vladimirov, Aleksander G. Vladimirov, Roman A. Shelepaev, Vladislav A. Yakovlev, Elena A. Vasyukova

“…Contacts between basic and felsic rocks vary from smooth contrasting to complex ‘lacerated’ flameshaped, and gradual transition zones are present (Fig. 6).The dykes were formed at mesoabyssal or abyssal depths, and the subliquidus heat regime was thus maintained for a long time, and even the smallest portions of the basic-rock melt were consolidated through quite a long period of time. …”
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Assessing global-scale organic matter reactivity patterns in marine sediments using a lognormal reactive continuum model by S. Xu, S. Xu, S. Xu, B. Liu, S. Arndt, S. Kasten, S. Kasten, S. Kasten, Z. Wu

“…The results show that the apparent OM reactivity (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>〈</mo><mi>k</mi><mo>〉</mo><mo>=</mo><mi mathvariant="italic">μ</mi><mo>⋅</mo><mi>exp⁡</mi><mo>(</mo><msup><mi mathvariant="italic">σ</mi><mn mathvariant="normal">2</mn></msup><mo>/</mo><mn mathvariant="normal">2</mn><mo>)</mo></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="90pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="a673da4fc51fe21a3219eb36d8711246"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="bg-20-2251-2023-ie00001.svg" width="90pt" height="16pt" src="bg-20-2251-2023-ie00001.png"/></svg:svg></span></span>) decreases with decreasing sedimentation rate (<span class="inline-formula"><i>ω</i></span>) and that OM reactivity is more than 3 orders of magnitude higher in shelf than in abyssal regions. Despite the general global trends, higher than expected OM reactivity is observed in certain ocean regions characterized by great water depth or pronounced oxygen minimum zones, such as the eastern–western coastal equatorial Pacific and the Arabian Sea, emphasizing the complex control of the depositional environment (e.g., OM flux, oxygen content in the water column) on benthic OM reactivity. …”
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6 Poems by Alisa Velaj, Arben P. Latifi

“…The Coolest Loser Blind eyes, sleepy,CHAR(13) + CHAR(10) across worldly winters –CHAR(13) + CHAR(10) eyes sunk into blooming abysses, my loser.CHAR(13) + CHAR(10) Please take a quick look at the sun by dawn,CHAR(13) + CHAR(10) it’s a lamp brighter than an eye’s pupil... …”
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State of the climate in 2010 by Achberger, C, Ackerman, SA, Ahlstrøm, A, Alfaro, E, Allan, R, Alves, L, Amador, J, Amelie, V, Andrianjafinirina, S, Antonov, J, Arndt, D, Ashik, I, Atheru, Z, Attaher, S, Baez, J, Banzon, V, Baringer, M, Barreira, S, Barriopedro, D, Barthia, P, Beal, L, Becker, A, Behrenfeld, M, Bell, G, Belward, A

“…Global integrals of upper ocean heat content for the past several years have reached values consistently higher than for all prior times in the record, demonstrating the dominant role of the ocean in the Earth's energy budget. Deep and abyssal waters of Antarctic origin have also trended warmer on average since the early 1990s. …”

Deep, diverse and definitely different: unique attributes of the world's largest ecosystem by E. Ramirez-Llodra, A. Brandt, R. Danovaro, B. De Mol, E. Escobar, C. R. German, L. A. Levin, P. Martinez Arbizu, L. Menot, P. Buhl-Mortensen, B. E. Narayanaswamy, C. R. Smith, D. P. Tittensor, P. A. Tyler, A. Vanreusel, M. Vecchione

“…This is true for most of the continental margins and abyssal plains with hot spots of diversity such as seamounts or cold-water corals. …”
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