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  • 1
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    Relative importance of pelagic and sediment respiration in causing hypoxia in a deep estuary (2012)
    Wiley
    Details
    Publication Date: 2012-08-25
    Description: Oxygen depletion in the 100-m thick bottom layer of the deep Lower St. Lawrence Estuary is currently thought to be principally caused by benthic oxygen demand overcoming turbulent oxygenation from overlying layers, with pelagic respiration playing a secondary role. This conception is revisited with idealized numerical simulations, historical oxygen observations and new turbulence measurements. Results indicate that a dominant sediment oxygen demand, over pelagic, is incompatible with the shape of observed oxygen profiles. It is further argued that to sustain oxygen depletion, the turbulent diffusivity in the bottom waters should be ≪10−4 m2 s−1, consistent with direct measurements but contrary to previous model results. A new model that includes an Arrhenius-type function for pelagic respiration and a parameterization for turbulence diffusivity is developed. The model demonstrates the importance of the bottom boundary layer in reproducing the shape of oxygen profiles and reproduces to within 14% the observed change in oxygen concentration in the Lower St. Lawrence Estuary. The analysis indicates that turbulent oxygenation represents about 8% of the sum of sediment and pelagic oxygen demand, consistent with the low turbulent oxygenation required to maintain oxygen depletion. However, contrary to previous hypotheses, it is concluded that pelagic oxygen demand needs to be five time larger than sediment oxygen demand to explain hypoxia in the 100-m thick bottom layer of the Lower St. Lawrence Estuary.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 2
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    Tissue Distribution and Depuration Kinetics of Waterborne 14C-labeled Light PAHs in Mummichog (Fundulus heteroclitus) (2011)
    American Chemical Society (ACS)
    Details
    Publication Date: 2011-03-10
    Description: Environmental Science & Technology DOI: 10.1021/es103133h
    Print ISSN: 0013-936X
    Electronic ISSN: 1520-5851
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Published by American Chemical Society (ACS)
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  • 3
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    Nitrite-driven anaerobic methane oxidation by oxygenic bacteria (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-03-26
    Description: Only three biological pathways are known to produce oxygen: photosynthesis, chlorate respiration and the detoxification of reactive oxygen species. Here we present evidence for a fourth pathway, possibly of considerable geochemical and evolutionary importance. The pathway was discovered after metagenomic sequencing of an enrichment culture that couples anaerobic oxidation of methane with the reduction of nitrite to dinitrogen. The complete genome of the dominant bacterium, named 'Candidatus Methylomirabilis oxyfera', was assembled. This apparently anaerobic, denitrifying bacterium encoded, transcribed and expressed the well-established aerobic pathway for methane oxidation, whereas it lacked known genes for dinitrogen production. Subsequent isotopic labelling indicated that 'M. oxyfera' bypassed the denitrification intermediate nitrous oxide by the conversion of two nitric oxide molecules to dinitrogen and oxygen, which was used to oxidize methane. These results extend our understanding of hydrocarbon degradation under anoxic conditions and explain the biochemical mechanism of a poorly understood freshwater methane sink. Because nitrogen oxides were already present on early Earth, our finding opens up the possibility that oxygen was available to microbial metabolism before the evolution of oxygenic photosynthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ettwig, Katharina F -- Butler, Margaret K -- Le Paslier, Denis -- Pelletier, Eric -- Mangenot, Sophie -- Kuypers, Marcel M M -- Schreiber, Frank -- Dutilh, Bas E -- Zedelius, Johannes -- de Beer, Dirk -- Gloerich, Jolein -- Wessels, Hans J C T -- van Alen, Theo -- Luesken, Francisca -- Wu, Ming L -- van de Pas-Schoonen, Katinka T -- Op den Camp, Huub J M -- Janssen-Megens, Eva M -- Francoijs, Kees-Jan -- Stunnenberg, Henk -- Weissenbach, Jean -- Jetten, Mike S M -- Strous, Marc -- England -- Nature. 2010 Mar 25;464(7288):543-8. doi: 10.1038/nature08883.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Radboud University Nijmegen, IWWR, Department of Microbiology, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands. k.ettwig@science.ru.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20336137" target="_blank"〉PubMed〈/a〉
    Keywords: *Anaerobiosis ; Bacteria/classification/enzymology/genetics/*metabolism ; Genome, Bacterial/genetics ; Methane/*metabolism ; Molecular Sequence Data ; Nitrites/*metabolism ; Oxidation-Reduction ; Oxygen/metabolism ; Oxygenases/genetics ; Phylogeny ; Soil Microbiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    Enterotypes of the human gut microbiome (2011)
    Nature Publishing Group (NPG)
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    Publication Date: 2011-04-22
    Description: Our knowledge of species and functional composition of the human gut microbiome is rapidly increasing, but it is still based on very few cohorts and little is known about variation across the world. By combining 22 newly sequenced faecal metagenomes of individuals from four countries with previously published data sets, here we identify three robust clusters (referred to as enterotypes hereafter) that are not nation or continent specific. We also confirmed the enterotypes in two published, larger cohorts, indicating that intestinal microbiota variation is generally stratified, not continuous. This indicates further the existence of a limited number of well-balanced host-microbial symbiotic states that might respond differently to diet and drug intake. The enterotypes are mostly driven by species composition, but abundant molecular functions are not necessarily provided by abundant species, highlighting the importance of a functional analysis to understand microbial communities. Although individual host properties such as body mass index, age, or gender cannot explain the observed enterotypes, data-driven marker genes or functional modules can be identified for each of these host properties. For example, twelve genes significantly correlate with age and three functional modules with the body mass index, hinting at a diagnostic potential of microbial markers.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3728647/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3728647/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arumugam, Manimozhiyan -- Raes, Jeroen -- Pelletier, Eric -- Le Paslier, Denis -- Yamada, Takuji -- Mende, Daniel R -- Fernandes, Gabriel R -- Tap, Julien -- Bruls, Thomas -- Batto, Jean-Michel -- Bertalan, Marcelo -- Borruel, Natalia -- Casellas, Francesc -- Fernandez, Leyden -- Gautier, Laurent -- Hansen, Torben -- Hattori, Masahira -- Hayashi, Tetsuya -- Kleerebezem, Michiel -- Kurokawa, Ken -- Leclerc, Marion -- Levenez, Florence -- Manichanh, Chaysavanh -- Nielsen, H Bjorn -- Nielsen, Trine -- Pons, Nicolas -- Poulain, Julie -- Qin, Junjie -- Sicheritz-Ponten, Thomas -- Tims, Sebastian -- Torrents, David -- Ugarte, Edgardo -- Zoetendal, Erwin G -- Wang, Jun -- Guarner, Francisco -- Pedersen, Oluf -- de Vos, Willem M -- Brunak, Soren -- Dore, Joel -- MetaHIT Consortium -- Antolin, Maria -- Artiguenave, Francois -- Blottiere, Herve M -- Almeida, Mathieu -- Brechot, Christian -- Cara, Carlos -- Chervaux, Christian -- Cultrone, Antonella -- Delorme, Christine -- Denariaz, Gerard -- Dervyn, Rozenn -- Foerstner, Konrad U -- Friss, Carsten -- van de Guchte, Maarten -- Guedon, Eric -- Haimet, Florence -- Huber, Wolfgang -- van Hylckama-Vlieg, Johan -- Jamet, Alexandre -- Juste, Catherine -- Kaci, Ghalia -- Knol, Jan -- Lakhdari, Omar -- Layec, Severine -- Le Roux, Karine -- Maguin, Emmanuelle -- Merieux, Alexandre -- Melo Minardi, Raquel -- M'rini, Christine -- Muller, Jean -- Oozeer, Raish -- Parkhill, Julian -- Renault, Pierre -- Rescigno, Maria -- Sanchez, Nicolas -- Sunagawa, Shinichi -- Torrejon, Antonio -- Turner, Keith -- Vandemeulebrouck, Gaetana -- Varela, Encarna -- Winogradsky, Yohanan -- Zeller, Georg -- Weissenbach, Jean -- Ehrlich, S Dusko -- Bork, Peer -- 076964/Wellcome Trust/United Kingdom -- 082372/Wellcome Trust/United Kingdom -- England -- Nature. 2011 May 12;473(7346):174-80. doi: 10.1038/nature09944. Epub 2011 Apr 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21508958" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*classification/genetics ; Bacterial Typing Techniques ; Biodiversity ; Biomarkers/analysis ; Europe ; Feces/microbiology ; Female ; Humans ; Intestines/*microbiology ; Male ; *Metagenome ; Metagenomics ; Phylogeny
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 5
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    Hydrogen is an energy source for hydrothermal vent symbioses (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-08-13
    Description: The discovery of deep-sea hydrothermal vents in 1977 revolutionized our understanding of the energy sources that fuel primary productivity on Earth. Hydrothermal vent ecosystems are dominated by animals that live in symbiosis with chemosynthetic bacteria. So far, only two energy sources have been shown to power chemosynthetic symbioses: reduced sulphur compounds and methane. Using metagenome sequencing, single-gene fluorescence in situ hybridization, immunohistochemistry, shipboard incubations and in situ mass spectrometry, we show here that the symbionts of the hydrothermal vent mussel Bathymodiolus from the Mid-Atlantic Ridge use hydrogen to power primary production. In addition, we show that the symbionts of Bathymodiolus mussels from Pacific vents have hupL, the key gene for hydrogen oxidation. Furthermore, the symbionts of other vent animals such as the tubeworm Riftia pachyptila and the shrimp Rimicaris exoculata also have hupL. We propose that the ability to use hydrogen as an energy source is widespread in hydrothermal vent symbioses, particularly at sites where hydrogen is abundant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petersen, Jillian M -- Zielinski, Frank U -- Pape, Thomas -- Seifert, Richard -- Moraru, Cristina -- Amann, Rudolf -- Hourdez, Stephane -- Girguis, Peter R -- Wankel, Scott D -- Barbe, Valerie -- Pelletier, Eric -- Fink, Dennis -- Borowski, Christian -- Bach, Wolfgang -- Dubilier, Nicole -- England -- Nature. 2011 Aug 10;476(7359):176-80. doi: 10.1038/nature10325.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21833083" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atlantic Ocean ; Bivalvia/drug effects/metabolism/*microbiology ; Dose-Response Relationship, Drug ; *Ecosystem ; *Energy Metabolism ; Geologic Sediments/chemistry ; Gills/drug effects/metabolism/microbiology ; Hot Springs/*chemistry/microbiology ; Hydrogen/analysis/*metabolism/pharmacology ; Hydrogenase/genetics/metabolism ; Molecular Sequence Data ; Oxidation-Reduction ; Partial Pressure ; Seawater/chemistry/microbiology ; Sulfides/metabolism ; Sulfur/metabolism ; Symbiosis/drug effects/genetics/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    A human gut microbial gene catalogue established by metagenomic sequencing (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-03-06
    Description: To understand the impact of gut microbes on human health and well-being it is crucial to assess their genetic potential. Here we describe the Illumina-based metagenomic sequencing, assembly and characterization of 3.3 million non-redundant microbial genes, derived from 576.7 gigabases of sequence, from faecal samples of 124 European individuals. The gene set, approximately 150 times larger than the human gene complement, contains an overwhelming majority of the prevalent (more frequent) microbial genes of the cohort and probably includes a large proportion of the prevalent human intestinal microbial genes. The genes are largely shared among individuals of the cohort. Over 99% of the genes are bacterial, indicating that the entire cohort harbours between 1,000 and 1,150 prevalent bacterial species and each individual at least 160 such species, which are also largely shared. We define and describe the minimal gut metagenome and the minimal gut bacterial genome in terms of functions present in all individuals and most bacteria, respectively.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3779803/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3779803/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Qin, Junjie -- Li, Ruiqiang -- Raes, Jeroen -- Arumugam, Manimozhiyan -- Burgdorf, Kristoffer Solvsten -- Manichanh, Chaysavanh -- Nielsen, Trine -- Pons, Nicolas -- Levenez, Florence -- Yamada, Takuji -- Mende, Daniel R -- Li, Junhua -- Xu, Junming -- Li, Shaochuan -- Li, Dongfang -- Cao, Jianjun -- Wang, Bo -- Liang, Huiqing -- Zheng, Huisong -- Xie, Yinlong -- Tap, Julien -- Lepage, Patricia -- Bertalan, Marcelo -- Batto, Jean-Michel -- Hansen, Torben -- Le Paslier, Denis -- Linneberg, Allan -- Nielsen, H Bjorn -- Pelletier, Eric -- Renault, Pierre -- Sicheritz-Ponten, Thomas -- Turner, Keith -- Zhu, Hongmei -- Yu, Chang -- Li, Shengting -- Jian, Min -- Zhou, Yan -- Li, Yingrui -- Zhang, Xiuqing -- Li, Songgang -- Qin, Nan -- Yang, Huanming -- Wang, Jian -- Brunak, Soren -- Dore, Joel -- Guarner, Francisco -- Kristiansen, Karsten -- Pedersen, Oluf -- Parkhill, Julian -- Weissenbach, Jean -- MetaHIT Consortium -- Bork, Peer -- Ehrlich, S Dusko -- Wang, Jun -- 085775/Wellcome Trust/United Kingdom -- England -- Nature. 2010 Mar 4;464(7285):59-65. doi: 10.1038/nature08821.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉BGI-Shenzhen, Shenzhen 518083, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20203603" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Bacteria/classification/genetics/isolation & purification/metabolism ; Cohort Studies ; Contig Mapping ; Denmark ; Feces/microbiology ; Gastrointestinal Tract/*microbiology ; Genes, Bacterial/genetics ; Genes, Essential/genetics ; Genome, Bacterial/genetics ; *Genomics ; Health ; Humans ; Inflammatory Bowel Diseases/genetics ; Metagenome/*genetics ; Obesity/genetics ; Open Reading Frames/genetics ; Overweight/genetics ; Sequence Analysis, DNA ; Spain
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 7
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    Growth of nitrite-oxidizing bacteria by aerobic hydrogen oxidation (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-08-30
    Description: The bacterial oxidation of nitrite to nitrate is a key process of the biogeochemical nitrogen cycle. Nitrite-oxidizing bacteria are considered a highly specialized functional group, which depends on the supply of nitrite from other microorganisms and whose distribution strictly correlates with nitrification in the environment and in wastewater treatment plants. On the basis of genomics, physiological experiments, and single-cell analyses, we show that Nitrospira moscoviensis, which represents a widely distributed lineage of nitrite-oxidizing bacteria, has the genetic inventory to utilize hydrogen (H2) as an alternative energy source for aerobic respiration and grows on H2 without nitrite. CO2 fixation occurred with H2 as the sole electron donor. Our results demonstrate a chemolithoautotrophic lifestyle of nitrite-oxidizing bacteria outside the nitrogen cycle, suggesting greater ecological flexibility than previously assumed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koch, Hanna -- Galushko, Alexander -- Albertsen, Mads -- Schintlmeister, Arno -- Gruber-Dorninger, Christiane -- Lucker, Sebastian -- Pelletier, Eric -- Le Paslier, Denis -- Spieck, Eva -- Richter, Andreas -- Nielsen, Per H -- Wagner, Michael -- Daims, Holger -- New York, N.Y. -- Science. 2014 Aug 29;345(6200):1052-4. doi: 10.1126/science.1256985.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Ecosystem Science, Division of Microbial Ecology, University of Vienna, 1090 Vienna, Austria. ; Center for Microbial Communities, Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, 9000 Aalborg, Denmark. ; Department of Microbiology and Ecosystem Science, Division of Microbial Ecology, University of Vienna, 1090 Vienna, Austria. Large Instrument Facility for Advanced Isotope Research, University of Vienna, 1090 Vienna, Austria. ; Commissariat a l'Energie Atomique, Direction des Sciences du Vivant, Institut de genomique, Genoscope, 91057 Evry, France. Centre National de la Recherche Scientifique, UMR8030, 91057 Evry, France. Universite d'Evry Val d'Essonne, 91057 Evry, France. ; Biozentrum Klein Flottbek, Microbiology and Biotechnology, University of Hamburg, 22609 Hamburg, Germany. ; Department of Microbiology and Ecosystem Science, Division of Terrestrial Ecosystem Research, University of Vienna, 1090 Vienna, Austria. ; Department of Microbiology and Ecosystem Science, Division of Microbial Ecology, University of Vienna, 1090 Vienna, Austria. daims@microbial-ecology.net.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25170152" target="_blank"〉PubMed〈/a〉
    Keywords: Aerobiosis ; Bacteria, Aerobic/genetics/*growth & development/*metabolism ; Chemoautotrophic Growth/genetics/*physiology ; Energy Metabolism ; Genetic Loci ; Hydrogen/*metabolism ; Hydrogenase/genetics ; Molecular Sequence Data ; Nitrates/metabolism ; Nitrification/genetics/physiology ; Nitrites/*metabolism ; *Nitrogen Cycle ; Oxidation-Reduction ; Sequence Analysis, DNA
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Ocean plankton. Environmental characteristics of Agulhas rings affect interocean plankton transport (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-05-23
    Description: Agulhas rings provide the principal route for ocean waters to circulate from the Indo-Pacific to the Atlantic basin. Their influence on global ocean circulation is well known, but their role in plankton transport is largely unexplored. We show that, although the coarse taxonomic structure of plankton communities is continuous across the Agulhas choke point, South Atlantic plankton diversity is altered compared with Indian Ocean source populations. Modeling and in situ sampling of a young Agulhas ring indicate that strong vertical mixing drives complex nitrogen cycling, shaping community metabolism and biogeochemical signatures as the ring and associated plankton transit westward. The peculiar local environment inside Agulhas rings may provide a selective mechanism contributing to the limited dispersal of Indian Ocean plankton populations into the Atlantic.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Villar, Emilie -- Farrant, Gregory K -- Follows, Michael -- Garczarek, Laurence -- Speich, Sabrina -- Audic, Stephane -- Bittner, Lucie -- Blanke, Bruno -- Brum, Jennifer R -- Brunet, Christophe -- Casotti, Raffaella -- Chase, Alison -- Dolan, John R -- d'Ortenzio, Fabrizio -- Gattuso, Jean-Pierre -- Grima, Nicolas -- Guidi, Lionel -- Hill, Christopher N -- Jahn, Oliver -- Jamet, Jean-Louis -- Le Goff, Herve -- Lepoivre, Cyrille -- Malviya, Shruti -- Pelletier, Eric -- Romagnan, Jean-Baptiste -- Roux, Simon -- Santini, Sebastien -- Scalco, Eleonora -- Schwenck, Sarah M -- Tanaka, Atsuko -- Testor, Pierre -- Vannier, Thomas -- Vincent, Flora -- Zingone, Adriana -- Dimier, Celine -- Picheral, Marc -- Searson, Sarah -- Kandels-Lewis, Stefanie -- Tara Oceans Coordinators -- Acinas, Silvia G -- Bork, Peer -- Boss, Emmanuel -- de Vargas, Colomban -- Gorsky, Gabriel -- Ogata, Hiroyuki -- Pesant, Stephane -- Sullivan, Matthew B -- Sunagawa, Shinichi -- Wincker, Patrick -- Karsenti, Eric -- Bowler, Chris -- Not, Fabrice -- Hingamp, Pascal -- Iudicone, Daniele -- New York, N.Y. -- Science. 2015 May 22;348(6237):1261447. doi: 10.1126/science.1261447.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Aix Marseille Universite, CNRS, IGS UMR 7256, 13288 Marseille, France. villar@igs.cnrs-mrs.fr not@sb-roscoff.fr hingamp@igs.cnrs-mrs.fr iudicone@szn.it karsenti@embl.de cbowler@biologie.ens.fr. ; CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France. Sorbonne Universites, Universite Pierre et Marie Curie UPMC, Universite Paris 06, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France. ; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA. ; Laboratoire de Physique des Oceans (LPO) UMR 6523 CNRS-Ifremer-IRD-UBO, Plouzane, France. Department of Geosciences, Laboratoire de Meteorologie Dynamique (LMD) UMR 8539, Ecole Normale Superieure, 24 Rue Lhomond, 75231 Paris Cedex 05, France. ; CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France. Sorbonne Universites, Universite Pierre et Marie Curie UPMC, Universite Paris 06, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France. Ecole Normale Superieure, Institut de Biologie de l'ENS (IBENS), and Inserm U1024, and CNRS UMR 8197, F-75005 Paris, France. ; Laboratoire de Physique des Oceans (LPO) UMR 6523 CNRS-Ifremer-IRD-UBO, Plouzane, France. ; Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA. ; Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy. ; School of Marine Sciences, University of Maine, Orono, ME, USA. ; Sorbonne Universites, UPMC Universite Paris 06, Observatoire Oceanologique, F-06230 Villefranche-sur-Mer, France. INSU-CNRS, UMR 7093, LOV, Observatoire Oceanologique, F-06230 Villefranche-sur-Mer, France. ; Universite de Toulon, Laboratoire PROTEE-EBMA E.A. 3819, BP 20132, 83957 La Garde Cedex, France. ; CNRS, UMR 7159, Laboratoire d'Oceanographie et du Climat LOCEAN, 4 Place Jussieu, 75005 Paris, France. ; Aix Marseille Universite, CNRS, IGS UMR 7256, 13288 Marseille, France. ; Ecole Normale Superieure, Institut de Biologie de l'ENS (IBENS), and Inserm U1024, and CNRS UMR 8197, F-75005 Paris, France. ; Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA), Institut de Genomique, Genoscope, 2 Rue Gaston Cremieux, 91057 Evry, France. CNRS, UMR 8030, CP5706, Evry, France. Universite d'Evry, UMR 8030, CP5706, Evry, France. ; Structural and Computational Biology, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany. Directors' Research, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany. ; Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM), CSIC, Passeig Maritim de la Barceloneta, 37-49, Barcelona E08003, Spain. ; Structural and Computational Biology, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany. Max-Delbruck-Centre for Molecular Medicine, 13092 Berlin, Germany. ; PANGAEA, Data Publisher for Earth and Environmental Science, University of Bremen, Bremen, Germany. MARUM, Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany. ; Structural and Computational Biology, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany. ; Ecole Normale Superieure, Institut de Biologie de l'ENS (IBENS), and Inserm U1024, and CNRS UMR 8197, F-75005 Paris, France. Directors' Research, European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany. villar@igs.cnrs-mrs.fr not@sb-roscoff.fr hingamp@igs.cnrs-mrs.fr iudicone@szn.it karsenti@embl.de cbowler@biologie.ens.fr. ; Ecole Normale Superieure, Institut de Biologie de l'ENS (IBENS), and Inserm U1024, and CNRS UMR 8197, F-75005 Paris, France. villar@igs.cnrs-mrs.fr not@sb-roscoff.fr hingamp@igs.cnrs-mrs.fr iudicone@szn.it karsenti@embl.de cbowler@biologie.ens.fr. ; CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France. Sorbonne Universites, Universite Pierre et Marie Curie UPMC, Universite Paris 06, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France. villar@igs.cnrs-mrs.fr not@sb-roscoff.fr hingamp@igs.cnrs-mrs.fr iudicone@szn.it karsenti@embl.de cbowler@biologie.ens.fr. ; Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy. villar@igs.cnrs-mrs.fr not@sb-roscoff.fr hingamp@igs.cnrs-mrs.fr iudicone@szn.it karsenti@embl.de cbowler@biologie.ens.fr.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25999514" target="_blank"〉PubMed〈/a〉
    Keywords: Atlantic Ocean ; DNA, Ribosomal/genetics ; Genetic Variation ; Indian Ocean ; Metagenomics ; Nitrites/metabolism ; Nitrogen/metabolism ; Plankton/genetics/metabolism/*physiology ; *Seawater ; Selection, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    CO2 diffusion into pore spaces limits weathering rate of an experimental basalt landscape (2017)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2017-02-23
    Description: Basalt weathering is a key control over the global carbon cycle, though in situ measurements of carbon cycling are lacking. In an experimental, vegetation-free hillslope containing 330 m 3 of ground basalt scoria, we measured real-time inorganic carbon dynamics within the porous media and seepage flow. The hillslope carbon flux (0.6–5.1 mg C m –2 h –1 ) matched weathering rates of natural basalt landscapes (0.4–8.8 mg C m –2 h –1 ) despite lacking the expected field-based impediments to weathering. After rainfall, a decrease in CO 2 concentration ([CO 2 ]) in pore spaces into solution suggested rapid carbon sequestration but slow reactant supply. Persistent low soil [CO 2 ] implied that diffusion limited CO 2 supply, while when sufficiently dry, reaction product concentrations limited further weathering. Strong influence of diffusion could cause spatial heterogeneity of weathering even in natural settings, implying that modeling studies need to include variable soil [CO 2 ] to improve carbon cycling estimates associated with potential carbon sequestration methods.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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    CO2 diffusion into pore spaces limits weathering rate of an experimental basalt landscape (2017)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2017-04-12
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
    Location Call Number Expected Availability
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