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Artigos de revistas sobre o tema "Océan archéen"

Autor: Grafiati

Publicado: 16 de novembro de 2024

Última modificação: 31 de julho de 2025

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1

Rüpke, Lars, and Fabrice Gaillard. "The Geological History of Water: From Earth’s Accretion to the Modern Deep Water Cycle." Elements 20, no. 4 (2024): 253–58. http://dx.doi.org/10.2138/gselements.20.4.253.

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The abundance of water on Earth and its distribution between surficial and deep reservoirs are the outcome of 4.6 billion years of geological history involving various mechanisms of water in and outgassing. Here, we use the metaphor of a pipeline connecting Earth’s deep and surface water reservoirs. The net flux through this pipeline has changed over time due to contrasting Hadean, Archean, and modern geodynamic regimes. Most water was dissolved in the primordial magma ocean, entrapped in the solidifying mantle, and massively released by volcanism during the Hadean and Archaean. As Earth coole

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2

Bano, Nasreen, Shomari Ruffin, Briana Ransom, and James T. Hollibaugh. "Phylogenetic Composition of Arctic Ocean Archaeal Assemblages and Comparison with Antarctic Assemblages." Applied and Environmental Microbiology 70, no. 2 (2004): 781–89. http://dx.doi.org/10.1128/aem.70.2.781-789.2004.

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ABSTRACT Archaea assemblages from the Arctic Ocean and Antarctic waters were compared by PCR-denaturing gradient gel electrophoresis (DGGE) analysis of 16S rRNA genes amplified using the Archaea-specific primers 344f and 517r. Inspection of the DGGE fingerprints of 33 samples from the Arctic Ocean (from SCICEX submarine cruises in 1995, 1996, and 1997) and 7 Antarctic samples from Gerlache Strait and Dallman Bay revealed that the richness of Archaea assemblages was greater in samples from deep water than in those from the upper water column in both polar oceans. DGGE banding patterns suggested

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Béjà, Oded, Eugene V. Koonin, L. Aravind, et al. "Comparative Genomic Analysis of Archaeal Genotypic Variants in a Single Population and in Two Different Oceanic Provinces." Applied and Environmental Microbiology 68, no. 1 (2002): 335–45. http://dx.doi.org/10.1128/aem.68.1.335-345.2002.

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ABSTRACT Planktonic crenarchaeotes are present in high abundance in Antarctic winter surface waters, and they also make up a large proportion of total cell numbers throughout deep ocean waters. To better characterize these uncultivated marine crenarchaeotes, we analyzed large genome fragments from individuals recovered from a single Antarctic picoplankton population and compared them to those from a representative obtained from deeper waters of the temperate North Pacific. Sequencing and analysis of the entire DNA insert from one Antarctic marine archaeon (fosmid 74A4) revealed differences in

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Robertson, Charles E., John R. Spear, J. Kirk Harris, and Norman R. Pace. "Diversity and Stratification of Archaea in a Hypersaline Microbial Mat." Applied and Environmental Microbiology 75, no. 7 (2008): 1801–10. http://dx.doi.org/10.1128/aem.01811-08.

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ABSTRACT The Guerrero Negro (GN) hypersaline microbial mats have become one focus for biogeochemical studies of stratified ecosystems. The GN mats are found beneath several of a series of ponds of increasing salinity that make up a solar saltern fed from Pacific Ocean water pumped from the Laguna Ojo de Liebre near GN, Baja California Sur, Mexico. Molecular surveys of the laminated photosynthetic microbial mat below the fourth pond in the series identified an enormous diversity of bacteria in the mat, but archaea have received little attention. To determine the bulk contribution of archaeal ph

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5

Johnson, Benjamin W., and Boswell A. Wing. "Limited Archaean continental emergence reflected in an early Archaean 18O-enriched ocean." Nature Geoscience 13, no. 3 (2020): 243–48. http://dx.doi.org/10.1038/s41561-020-0538-9.

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Kendall, Brian, Christopher T. Reinhard, Timothy W. Lyons, Alan J. Kaufman, Simon W. Poulton, and Ariel D. Anbar. "Pervasive oxygenation along late Archaean ocean margins." Nature Geoscience 3, no. 9 (2010): 647–52. http://dx.doi.org/10.1038/ngeo942.

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7

Crowe, S. A., C. Jones, S. Katsev, et al. "Photoferrotrophs thrive in an Archean Ocean analogue." Proceedings of the National Academy of Sciences 105, no. 41 (2008): 15938–43. http://dx.doi.org/10.1073/pnas.0805313105.

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8

Busigny, Vincent, Noah J. Planavsky, Didier Jézéquel, et al. "Iron isotopes in an Archean ocean analogue." Geochimica et Cosmochimica Acta 133 (May 2014): 443–62. http://dx.doi.org/10.1016/j.gca.2014.03.004.

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9

Ouverney, Cleber C., and Jed A. Fuhrman. "Marine Planktonic Archaea Take Up Amino Acids." Applied and Environmental Microbiology 66, no. 11 (2000): 4829–33. http://dx.doi.org/10.1128/aem.66.11.4829-4833.2000.

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ABSTRACT Archaea are traditionally thought of as “extremophiles,” but recent studies have shown that marine planktonic Archaea make up a surprisingly large percentage of ocean midwater microbial communities, up to 60% of the total prokaryotes. However, the basic physiology and contribution of Archaea to community microbial activity remain unknown. We have studied Archaea from 200-m depths of the northwest Mediterranean Sea and the Pacific Ocean near California, measuring the archaeal activity under simulated natural conditions (8 to 17°C, dark and anaerobic) by means of a method called substra

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10

Corrigan, David, Natasha Wodicka, Christopher McFarlane, et al. "Lithotectonic Framework of the Core Zone, Southeastern Churchill Province, Canada." Geoscience Canada 45, no. 1 (2018): 1–24. http://dx.doi.org/10.12789/geocanj.2018.45.128.

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The Core Zone, a broad region located between the Superior and North Atlantic cratons and predominantly underlain by Archean gneiss and granitoid rocks, remained until recently one of the less well known parts of the Canadian Shield. Previously thought to form part of the Archean Rae Craton, and later referred to as the Southeastern Churchill Province, it has been regarded as an ancient continental block trapped between the Paleoproterozoic Torngat and New Quebec orogens, with its relationships to the adjacent Superior and North Atlantic cratons remaining unresolved. The geochronological data

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11

Harrison, C. G. A. "Constraints on ocean volume change since the Archean." Geophysical Research Letters 26, no. 13 (1999): 1913–16. http://dx.doi.org/10.1029/1999gl900425.

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12

Habicht, K. S. "Calibration of Sulfate Levels in the Archean Ocean." Science 298, no. 5602 (2002): 2372–74. http://dx.doi.org/10.1126/science.1078265.

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13

Henderson-Sellers, B., and A. Henderson-Sellers. "Modelling the ocean climate for the early archaean." Palaeogeography, Palaeoclimatology, Palaeoecology 75, no. 3 (1989): 195–221. http://dx.doi.org/10.1016/0031-0182(89)90177-6.

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14

Busigny, Vincent, Oanez Lebeau, Magali Ader, Bryan Krapež, and Andrey Bekker. "Nitrogen cycle in the Late Archean ferruginous ocean." Chemical Geology 362 (December 2013): 115–30. http://dx.doi.org/10.1016/j.chemgeo.2013.06.023.

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Henderson-Sellers, B., and A. Henderson-Sellers. "Modelling the ocean climate for the early archaean." Global and Planetary Change 1, no. 3 (1989): 195–221. http://dx.doi.org/10.1016/0921-8181(89)90003-9.

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Sharma, S. Das, D. J. Patil, R. Srinivasan, and K. Gopalan. "Very high18o enrichment in Archean cherts from South India: implications for Archean ocean temperature." Terra Nova 6, no. 4 (1994): 385–90. http://dx.doi.org/10.1111/j.1365-3121.1994.tb00511.x.

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17

Callieri, Cristiana, Gianluca Corno, Emanuele Caravati, Serena Rasconi, Mario Contesini, and Roberto Bertoni. "Bacteria, Archaea, and Crenarchaeota in the Epilimnion and Hypolimnion of a Deep Holo-Oligomictic Lake." Applied and Environmental Microbiology 75, no. 22 (2009): 7298–300. http://dx.doi.org/10.1128/aem.01231-09.

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ABSTRACT In a deep, subalpine holo-oligomictic lake, the relative abundance of Archaea and Crenarchaeota, but not that of Bacteria, increases significantly with depth and varies seasonally. Cell-specific prokaryotic productivity is homogeneous along the water column. The concept of active Archaea observed in the deep ocean can therefore be extended to a deep oxic lake.

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18

Avila-Alonso, Dailé, Jan M. Baetens, Rolando Cardenas, and Bernard De Baets. "Assessing the effects of ultraviolet radiation on the photosynthetic potential in Archean marine environments." International Journal of Astrobiology 16, no. 3 (2016): 271–79. http://dx.doi.org/10.1017/s147355041600032x.

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AbstractIn this work, the photosynthesis model presented by Avilaet al. in 2013 is extended and more scenarios inhabited by ancient cyanobacteria are investigated to quantify the effects of ultraviolet (UV) radiation on their photosynthetic potential in marine environments of the Archean eon. We consider ferrous ions as blockers of UV during the Early Archean, while the absorption spectrum of chlorophyllais used to quantify the fraction of photosynthetically active radiation absorbed by photosynthetic organisms. UV could have induced photoinhibition at the water surface, thereby strongly affec

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19

Krissansen-Totton, Joshua, Giada N. Arney, and David C. Catling. "Constraining the climate and ocean pH of the early Earth with a geological carbon cycle model." Proceedings of the National Academy of Sciences 115, no. 16 (2018): 4105–10. http://dx.doi.org/10.1073/pnas.1721296115.

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The early Earth’s environment is controversial. Climatic estimates range from hot to glacial, and inferred marine pH spans strongly alkaline to acidic. Better understanding of early climate and ocean chemistry would improve our knowledge of the origin of life and its coevolution with the environment. Here, we use a geological carbon cycle model with ocean chemistry to calculate self-consistent histories of climate and ocean pH. Our carbon cycle model includes an empirically justified temperature and pH dependence of seafloor weathering, allowing the relative importance of continental and seafl

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20

Vik, Dean R., Simon Roux, Jennifer R. Brum, et al. "Putative archaeal viruses from the mesopelagic ocean." PeerJ 5 (June 15, 2017): e3428. http://dx.doi.org/10.7717/peerj.3428.

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Oceanic viruses that infect bacteria, or phages, are known to modulate host diversity, metabolisms, and biogeochemical cycling, while the viruses that infect marine Archaea remain understudied despite the critical ecosystem roles played by their hosts. Here we introduce “MArVD”, for Metagenomic Archaeal Virus Detector, an annotation tool designed to identify putative archaeal virus contigs in metagenomic datasets. MArVD is made publicly available through the online iVirus analytical platform. Benchmarking analysis of MArVD showed it to be >99% accurate and 100% sensitive in identifying the

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Meador, Travis B., Niels Schoffelen, Timothy G. Ferdelman, Osmond Rebello, Alexander Khachikyan, and Martin Könneke. "Carbon recycling efficiency and phosphate turnover by marine nitrifying archaea." Science Advances 6, no. 19 (2020): eaba1799. http://dx.doi.org/10.1126/sciadv.aba1799.

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Thaumarchaeotal nitrifiers are among the most abundant organisms in the ocean, but still unknown is the carbon (C) yield from nitrification and the coupling of these fluxes to phosphorus (P) turnover and release of metabolites from the cell. Using a dual radiotracer approach, we found that Nitrosopumilus maritimus fixed roughly 0.3 mol C, assimilated 2 mmol P, and released ca. 10−2 mol C and 10−5 mol P as dissolved organics (DOC and DOP) per mole ammonia respired. Phosphate turnover may influence assimilation fluxes by nitrifiers in the euphotic zone, which parallel those of the dark ocean. Co

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22

Loescher, C. R., A. Kock, M. Koenneke, J. LaRoche, H. W. Bange, and R. A. Schmitz. "Production of oceanic nitrous oxide by ammonia-oxidizing archaea." Biogeosciences Discussions 9, no. 2 (2012): 2095–122. http://dx.doi.org/10.5194/bgd-9-2095-2012.

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Abstract. The recent finding that microbial ammonia oxidation in the ocean is performed by archaea to a greater extent than by bacteria has drastically changed the view on oceanic nitrification. The numerical dominance of archaeal ammonia-oxidizers (AOA) over their bacterial counterparts (AOB) in large parts of the ocean leads to the hypothesis that AOA rather than AOB could be the key organisms for the oceanic production of the strong greenhouse gas nitrous oxide (N2O) which occurs as a by-product of nitrification. Very recently, enrichment cultures of marine ammonia-oxidizing archaea have be

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23

Löscher, C. R., A. Kock, M. Könneke, J. LaRoche, H. W. Bange, and R. A. Schmitz. "Production of oceanic nitrous oxide by ammonia-oxidizing archaea." Biogeosciences 9, no. 7 (2012): 2419–29. http://dx.doi.org/10.5194/bg-9-2419-2012.

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Abstract. The recent finding that microbial ammonia oxidation in the ocean is performed by archaea to a greater extent than by bacteria has drastically changed the view on oceanic nitrification. The numerical dominance of archaeal ammonia-oxidizers (AOA) over their bacterial counterparts (AOB) in large parts of the ocean leads to the hypothesis that AOA rather than AOB could be the key organisms for the oceanic production of the strong greenhouse gas nitrous oxide (N2O) that occurs as a by-product of nitrification. Very recently, enrichment cultures of marine ammonia-oxidizing archaea have bee

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24

Mehta, Mausmi P., David A. Butterfield, and John A. Baross. "Phylogenetic Diversity of Nitrogenase (nifH) Genes in Deep-Sea and Hydrothermal Vent Environments of the Juan de Fuca Ridge." Applied and Environmental Microbiology 69, no. 2 (2003): 960–70. http://dx.doi.org/10.1128/aem.69.2.960-970.2003.

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ABSTRACT The subseafloor microbial habitat associated with typical unsedimented mid-ocean-ridge hydrothermal vent ecosystems may be limited by the availability of fixed nitrogen, inferred by the low ammonium and nitrate concentrations measured in diffuse hydrothermal fluid. Dissolved N2 gas, the largest reservoir of nitrogen in the ocean, is abundant in deep-sea and hydrothermal vent fluid. In order to test the hypothesis that biological nitrogen fixation plays an important role in nitrogen cycling in the subseafloor associated with unsedimented hydrothermal vents, degenerate PCR primers were

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Herndl, Gerhard J., Thomas Reinthaler, Eva Teira, et al. "Contribution of Archaea to Total Prokaryotic Production in the Deep Atlantic Ocean." Applied and Environmental Microbiology 71, no. 5 (2005): 2303–9. http://dx.doi.org/10.1128/aem.71.5.2303-2309.2005.

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ABSTRACT Fluorescence in situ hybridization (FISH) in combination with polynucleotide probes revealed that the two major groups of planktonic Archaea (Crenarchaeota and Euryarchaeota) exhibit a different distribution pattern in the water column of the Pacific subtropical gyre and in the Antarctic Circumpolar Current system. While Euryarchaeota were found to be more dominant in nearsurface waters, Crenarchaeota were relatively more abundant in the mesopelagic and bathypelagic waters. We determined the abundance of archaea in the mesopelagic and bathypelagic North Atlantic along a south-north tr

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Olson, Haley C., Nadja Drabon, and David T. Johnston. "Oxygen isotope insights into the Archean ocean and atmosphere." Earth and Planetary Science Letters 591 (August 2022): 117603. http://dx.doi.org/10.1016/j.epsl.2022.117603.

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Kitajima, K., S. Maruyama, S. Utsunomiya, and J. G. Liou. "Seafloor hydrothermal alteration at an Archaean mid-ocean ridge." Journal of Metamorphic Geology 19, no. 5 (2001): 583–99. http://dx.doi.org/10.1046/j.0263-4929.2001.00330.x.

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Sleep, Norman H. "Archean plate tectonics: what can be learned from continental geology?" Canadian Journal of Earth Sciences 29, no. 10 (1992): 2066–71. http://dx.doi.org/10.1139/e92-164.

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Some basic questions about Archean plate tectonics can be addressed by examining accretionary Archean margins, in particular fault zones with significant strike-slip components on the Canadian Shield. (1) Were the oceanic plates typically rigid like modern plates? Yes. Significant lateral viscosity contrasts in the lithosphere between plates and plate boundaries are required for major strike-slip faults to exist. Conversely, strike-slip faults are a kinematic consequence of rigid plates. (2) Did large oceanic plates exist in the Archean? Probably. First, the length and offset of the longest pr

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Teira, Eva, Thomas Reinthaler, Annelie Pernthaler, Jakob Pernthaler, and Gerhard J. Herndl. "Combining Catalyzed Reporter Deposition-Fluorescence In Situ Hybridization and Microautoradiography To Detect Substrate Utilization by Bacteria and Archaea in the Deep Ocean." Applied and Environmental Microbiology 70, no. 7 (2004): 4411–14. http://dx.doi.org/10.1128/aem.70.7.4411-4414.2004.

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ABSTRACT The recently developed CARD-FISH protocol was refined for the detection of marine Archaea by replacing the lysozyme permeabilization treatment with proteinase K. This modification resulted in about twofold-higher detection rates for Archaea in deep waters. Using this method in combination with microautoradiography, we found that Archaea are more abundant than Bacteria (42% versus 32% of 4′,6′-diamidino-2-phenylindole counts) in the deep waters of the North Atlantic and that a larger fraction of Archaea than of Bacteria takes up l-aspartic acid (19% versus 10%).

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Kienert, H., G. Feulner, and V. Petoukhov. "Albedo and heat transport in 3-D model simulations of the early Archean climate." Climate of the Past 9, no. 4 (2013): 1841–62. http://dx.doi.org/10.5194/cp-9-1841-2013.

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Abstract. At the beginning of the Archean eon (ca. 3.8 billion years ago), the Earth's climate state was significantly different from today due to the lower solar luminosity, smaller continental fraction, higher rotation rate and, presumably, significantly larger greenhouse gas concentrations. All these aspects play a role in solutions to the "faint young Sun paradox" which must explain why the ocean surface was not fully frozen at that time. Here, we present 3-D model simulations of climate states that are consistent with early Archean boundary conditions and have different CO2 concentrations

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DeLong, Edward. "Microbial Domains in the Ocean: A Lesson from the Archaea." Oceanography 20, no. 2 (2007): 124–29. http://dx.doi.org/10.5670/oceanog.2007.56.

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Gifford, Jennifer N., Shawn J. Malone, and Paul A. Mueller. "The Medicine Hat Block and the Early Paleoproterozoic Assembly of Western Laurentia." Geosciences 10, no. 7 (2020): 271. http://dx.doi.org/10.3390/geosciences10070271.

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The accretion of the Wyoming, Hearne, and Superior Provinces to form the Archean core of western Laurentia occurred rapidly in the Paleoproterozoic. Missing from Hoffman’s (1988) original rapid aggregation model was the Medicine Hat block (MHB). The MHB is a structurally distinct, complex block of Precambrian crystalline crust located between the Archean Wyoming Craton and the Archean Hearne Province and overlain by an extensive Phanerozoic cover. It is distinguished on the basis of geophysical evidence and limited geochemical data from crustal xenoliths and drill core. New U-Pb ages and Lu-Hf

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Santoro, Alyson E., Christopher L. Dupont, R. Alex Richter, et al. "Genomic and proteomic characterization of “CandidatusNitrosopelagicus brevis”: An ammonia-oxidizing archaeon from the open ocean." Proceedings of the National Academy of Sciences 112, no. 4 (2015): 1173–78. http://dx.doi.org/10.1073/pnas.1416223112.

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Thaumarchaeota are among the most abundant microbial cells in the ocean, but difficulty in cultivating marine Thaumarchaeota has hindered investigation into the physiological and evolutionary basis of their success. We report here a closed genome assembled from a highly enriched culture of the ammonia-oxidizing pelagic thaumarchaeon CN25, originating from the open ocean. The CN25 genome exhibits strong evidence of genome streamlining, including a 1.23-Mbp genome, a high coding density, and a low number of paralogous genes. Proteomic analysis recovered nearly 70% of the predicted proteins encod

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Kienert, H., G. Feulner, and V. Petoukhov. "Albedo and heat transport in 3-dimensional model simulations of the early Archean climate." Climate of the Past Discussions 9, no. 1 (2013): 525–82. http://dx.doi.org/10.5194/cpd-9-525-2013.

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Abstract. At the beginning of the Archean eon (ca. 3.8 billion yr ago), the Earth's climate state was significantly different from today due to the lower solar luminosity, smaller continental fraction, higher rotation rate and, presumably, significantly larger greenhouse gas concentrations. All these aspects play a role in solutions to the "faint young Sun problem" which must explain why the ocean surface was not fully frozen at that time. Here, we present 3-dimensional model simulations of climate states that are consistent with early Archean boundary conditions and have different CO2 concent

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35

Rey, Patrice F., Nicolas Coltice, and Nicolas Flament. "Archean Geodynamics Underneath Weak, Flat, and Flooded Continents." Elements 20, no. 3 (2024): 180–86. http://dx.doi.org/10.2138/gselements.20.3.180.

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Although a significant volume of crust was extracted from the mantle early in Earth’s history, the contribution of felsic rocks to the sedimentary record was minimal until ~3.0 Ga. On a hotter Earth, this conundrum dissipates if we consider that the felsic crust was buried under thick basaltic covers, continents were flooded by a near-global ocean, and the crust was too weak to sustain high mountains, making it largely unavailable to erosion. Gravitational forces destabilized basaltic covers within these weak, flat, and flooded continents, driving intra-crustal tectonics and forcing episodic s

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Chaban, Bonnie, Sandy Y. M. Ng, and Ken F. Jarrell. "Archaeal habitats — from the extreme to the ordinary." Canadian Journal of Microbiology 52, no. 2 (2006): 73–116. http://dx.doi.org/10.1139/w05-147.

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The domain Archaea represents a third line of evolutionary descent, separate from Bacteria and Eucarya. Initial studies seemed to limit archaea to various extreme environments. These included habitats at the extreme limits that allow life on earth, in terms of temperature, pH, salinity, and anaerobiosis, which were the homes to hyper thermo philes, extreme (thermo)acidophiles, extreme halophiles, and methanogens. Typical environments from which pure cultures of archaeal species have been isolated include hot springs, hydrothermal vents, solfataras, salt lakes, soda lakes, sewage digesters, and

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Le Hir, G., Y. Teitler, F. Fluteau, Y. Donnadieu, and P. Philippot. "The faint young Sun problem revisited with a 3-D climate–carbon model – Part 1." Climate of the Past 10, no. 2 (2014): 697–713. http://dx.doi.org/10.5194/cp-10-697-2014.

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Abstract. During the Archaean, the Sun's luminosity was 18 to 25% lower than the present day. One-dimensional radiative convective models (RCM) generally infer that high concentrations of greenhouse gases (CO2, CH4) are required to prevent the early Earth's surface temperature from dropping below the freezing point of liquid water and satisfying the faint young Sun paradox (FYSP, an Earth temperature at least as warm as today). Using a one-dimensional (1-D) model, it was proposed in 2010 that the association of a reduced albedo and less reflective clouds may have been responsible for the maint

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Zhang, Chuanlun L., Ann Pearson, Yi-Liang Li, Gary Mills, and Juergen Wiegel. "Thermophilic Temperature Optimum for Crenarchaeol Synthesis and Its Implication for Archaeal Evolution." Applied and Environmental Microbiology 72, no. 6 (2006): 4419–22. http://dx.doi.org/10.1128/aem.00191-06.

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ABSTRACT The isoprenoid lipid crenarchaeol is widespread in hot springs of California and Nevada. Terrestrial and marine data together suggest a maximum relative abundance of crenarchaeol at ∼40ï¿½C. This warm temperature optimum may have facilitated colonization of the ocean by (hyper)thermophilic Archaea and the major marine radiation of Crenarchaeota.

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Murray, AE, KY Wu, CL Moyer, DM Karl, and EF DeLong. "Evidence for circumpolar distribution of planktonic Archaea in the Southern Ocean." Aquatic Microbial Ecology 18 (1999): 263–73. http://dx.doi.org/10.3354/ame018263.

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Godfrey, Linda V., and Paul G. Falkowski. "The cycling and redox state of nitrogen in the Archaean ocean." Nature Geoscience 2, no. 10 (2009): 725–29. http://dx.doi.org/10.1038/ngeo633.

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Pasek, M. A., J. P. Harnmeijer, R. Buick, M. Gull, and Z. Atlas. "Evidence for reactive reduced phosphorus species in the early Archean ocean." Proceedings of the National Academy of Sciences 110, no. 25 (2013): 10089–94. http://dx.doi.org/10.1073/pnas.1303904110.

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Shibuya, Takazo, Tsuyoshi Komiya, Kentaro Nakamura, Ken Takai, and Shigenori Maruyama. "Highly alkaline, high-temperature hydrothermal fluids in the early Archean ocean." Precambrian Research 182, no. 3 (2010): 230–38. http://dx.doi.org/10.1016/j.precamres.2010.08.011.

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Rouxel, O. J. "Iron Isotope Constraints on the Archean and Paleoproterozoic Ocean Redox State." Science 307, no. 5712 (2005): 1088–91. http://dx.doi.org/10.1126/science.1105692.

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Dey, S., and J. F. Moyen. "About this title - Archean Granitoids of India: Windows into Early Earth Tectonics." Geological Society, London, Special Publications 489, no. 1 (2020): NP. http://dx.doi.org/10.1144/sp489.

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Granitoids form the bulk of the Archean continental crust and preserve key information on early Earth evolution. India hosts five main Archean cratonic blocks (Aravalli, Bundelkhand, Singhbhum, Bastar and Dharwar). This book summarizes the available information on Archean granitoids of Indian cratons. The chapters cover a broad spectrum of themes related to granitoid typology, emplacement mechanism, petrogenesis, phase-equilibria modelling, temporal distribution, tectonic setting, and their roles in fluid evolution, metal delivery and mineralizations. The book presents a broader picture incorp

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Rollinson, H. R. "Early basic magmatism in the evolution of Archaean high-grade gneiss terrains: an example from the Lewisian of NW Scotland." Mineralogical Magazine 51, no. 361 (1987): 345–55. http://dx.doi.org/10.1180/minmag.1987.051.361.02.

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AbstractAmphibolite blocks from an Archaean (2.9 Ga) trondhjemite-agmatite complex in the Lewisian at Gruinard Bay have a varied trace element and REE content. Whilst some of the variability is attributable to element mobility during high-grade metamorphism and subsequent trondhjemite magmatism, it is for the main part considered to be a primary feature of the amphibolites. The observed trace element and REE chemistry is best explained in terms of source region heterogeneity and suggests a melting regime comparable with that beneath certain types of mid-ocean ridge. There are geochemical simil

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DeLong, Edward F., Lance Trent Taylor, Terence L. Marsh, and Christina M. Preston. "Visualization and Enumeration of Marine Planktonic Archaea and Bacteria by Using Polyribonucleotide Probes and Fluorescent In Situ Hybridization." Applied and Environmental Microbiology 65, no. 12 (1999): 5554–63. http://dx.doi.org/10.1128/aem.65.12.5554-5563.1999.

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ABSTRACT Fluorescent in situ hybridization (FISH) using rRNA-specific oligonucleotide probes has emerged as a popular technique for identifying individual microbial cells. In natural samples, however, the signal derived from fluor-labeled oligonucleotide probes often is undetectable above background fluorescence in many cells. To circumvent this difficulty, we applied fluorochrome-labeled polyribonucleotide probes to identify and enumerate marine planktonic archaea and bacteria. The approach greatly enhanced the sensitivity and applicability of FISH with seawater samples, allowing confident id

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Ciscato, Emily R., Tomaso R. R. Bontognali, Simon W. Poulton, and Derek Vance. "Copper and its Isotopes in Organic-Rich Sediments: From the Modern Peru Margin to Archean Shales." Geosciences 9, no. 8 (2019): 325. http://dx.doi.org/10.3390/geosciences9080325.

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The cycling of copper (Cu) and its isotopes in the modern ocean is controlled by the interplay of biology, redox settings, and organic complexation. To help build a robust understanding of Cu cycling in the modern ocean and investigate the potential processes controlling its behavior in the geological past, this study presents Cu abundance and isotope data from modern Peru Margin sediments as well as from a suite of ancient, mostly organic-rich, shales. Analyses of an organic-pyrite fraction extracted from bulk modern sediments suggest that sulphidation is the main control on authigenic Cu enr

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Heard, Andy W., Nicolas Dauphas, Romain Guilbaud, et al. "Triple iron isotope constraints on the role of ocean iron sinks in early atmospheric oxygenation." Science 370, no. 6515 (2020): 446–49. http://dx.doi.org/10.1126/science.aaz8821.

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The role that iron played in the oxygenation of Earth’s surface is equivocal. Iron could have consumed molecular oxygen when Fe3+-oxyhydroxides formed in the oceans, or it could have promoted atmospheric oxidation by means of pyrite burial. Through high-precision iron isotopic measurements of Archean-Paleoproterozoic sediments and laboratory grown pyrites, we show that the triple iron isotopic composition of Neoarchean-Paleoproterozoic pyrites requires both extensive marine iron oxidation and sulfide-limited pyritization. Using an isotopic fractionation model informed by these data, we constra

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de Wit, Maarten, and Christien Thiart. "Metallogenic fingerprints of Archaean cratons." Geological Society, London, Special Publications 248, no. 1 (2005): 59–70. http://dx.doi.org/10.1144/gsl.sp.2005.248.01.03.

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Blättler, C. L., L. R. Kump, W. W. Fischer, G. Paris, J. J. Kasbohm, and J. A. Higgins. "Constraints on ocean carbonate chemistry and pCO2 in the Archaean and Palaeoproterozoic." Nature Geoscience 10, no. 1 (2016): 41–45. http://dx.doi.org/10.1038/ngeo2844.

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