BN14A:
Biogeochemical Processes Across Oxic-Anoxic Transitions III Posters


Session ID#: 37417

Session Description:
A suite of metabolically and chemically important oxidation-reduction reactions occur through the transitions from oxic to anoxic regions of the ocean. These reactions drive nutrient availability and metal solubility, as well as organic matter production, consumption, and preservation. As oxygen minimum and deficient zones expand, redox reactions in low to no oxygen environments are becoming globally more important, both for the nitrogen and carbon cycles and also for trace metals. Understanding such environments can provide an important analogue for ocean chemistry and microbial life during past periods of widespread ocean anoxia. This session seeks to bring together geochemical, biological, and physical scientists working on low oxygen and anoxic environments, in order to create an integrated picture of biogeochemistry in these systems. Presentations from observational, experimental, or modeling standpoints on nutrients, trace elements, dissolved gases, isotope systematics, microbiology, biological productivity, or physical drivers in these systems are all invited. We especially encourage submissions investigating the redox transition in the water column or sediments of restricted basins such as Saanich Inlet and the Black Sea, as well as open-marine systems such as the Eastern Tropical Pacific, North Atlantic, and Indian OMZs.
Primary Chair:  Jeffry V Sorensen, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Co-chairs:  Roberta Claire Hamme, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, Florian Scholz, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Tim M Conway, University of South Florida, St. Petersburg, FL, United States
Moderators:  Roberta Claire Hamme, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, Tim M Conway, University of South Florida, St. Petersburg, FL, United States and Florian Scholz, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Student Paper Review Liaison:  Tim M Conway, University of South Florida, St. Petersburg, FL, United States
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4802 Anoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • MG - Marine Geology and Sedimentology

Abstracts Submitted to this Session:

Towards a Mechanistic Understanding of δ238U Fractionation during Early Diagenesis (313562)
Amy Marie Kuzminov1, Silke Severmann1 and Caroline P Slomp2, (1)Rutgers University, New Brunswick, NJ, United States, (2)Utrecht University, Utrecht, 3584, Netherlands
A High-Resolution Study of Pelagic Primary Productivity and Nutrient Dynamics in a Temperate Fjord (320330)
Sile Morgaine Kafrissen, University of Victoria, Victoria, Canada, Karina E Giesbrecht, University of Victoria, Victoria, BC, Canada and Diana E Varela, University of Victoria, Department of Biology & School of Earth and Ocean Sciences, Victoria, BC, Canada
Marine Bacterioplankton Succession and Subsequent Overturn within Seasonally Hypoxic Waters of a Subtropical Sound; Devil’s Hole, Bermuda (314803)
Petra Kim Byl, University of Chicago, Geophyscial Sciences, Chicago, IL, United States, Nicholas Robert Bates, Bermuda Institute of Ocean Sciences, St. George's, Bermuda, Rachel Jane Parsons, Bermuda Institute for Ocean Sciences, BIOS, St. George's, Bermuda, Rebecca Garley, Bermuda Institute of Ocean Sciences, St.George's, Bermuda and Brett Jameson, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Biogeochemical Cycling of Dissolved Organic Matter in Response to Changing Redox-Conditions in the Baltic Sea (311060)
Michael Seidel1, Elvita Eglite2, Natalie Loick-Wilde2 and Thorsten Dittmar3, (1)University of Oldenburg, Oldenburg, Germany, (2)Leibniz Institute for Baltic Sea Research, Rostock, Germany, (3)Carl von Ossietzky University Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany
Onset of Benthic Nitrate Reduction Processes Following Natural Oxygenation of Long-Term Anoxic Bottoms (322426)
Astrid Hylen1, Stefano Bonaglia2, Ugo Marzocchi3,4, Mikhail Y. Kononets1 and Per O J Hall1, (1)University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden, (2)Stockholm University, Department of Ecology, Environment and Plant Sciences, Stockholm, Sweden, (3)Aarhus University, Center for Geomicrobiology, Department of Bioscience, Aarhus C, Denmark, (4)Vrije Universiteit Brussel, Department of Analytical, Environmental and Geo-Chemistry, Brussels, Belgium
Filamentous Giant Beggiatoaceae From Guaymas Basin Are Capable Of Both Denitrification And Dissimilatory Nitrate Reduction To Ammonium (DNRA) (325083)
Charles Schutte1, Andreas Teske2, Barbara J MacGregor3, Verena Salman-Carvalho4 and Dirk de Beer4, (1)Louisiana Universities Marine Consortium, Chauvin, LA, United States, (2)The University of North Carolina at Chapel Hill, Department of Marine Sciences, Chapel Hill, NC, United States, (3)Univ of North Carolina, Chapel Hill, NC, United States, (4)Max Planck Institute for Marine Microbiology, Bremen, Germany
Testing Functional Predictions and Subcellular Location of Poorly Characterized Genes Potentially Involved in S(0) Metabolism (314897)
Katie Kalis, Amalie Tuerk Levy and Thomas E Hanson, University of Delaware, Newark, DE, United States
Chromium Stable Isotopes as Tracers for Cr(III) Oxidation During Active Microbially-Mediated Mn(II) Oxidation (323795)
Marzia Miletto1, Xiangli Wang2, Noah Planavsky2, George W Luther III3 and Bradley M Tebo4, (1)Oregon Health & Science University, Division of Environmental and Biomolecular Systems, Beaverton, OR, United States, (2)Yale University, Department of Geology and Geophysics, New Haven, CT, United States, (3)University of Delaware, College of Earth, Ocean and Environment, Lewes, DE, United States, (4)Oregon Health & Science University, Division of Environmental and Biomolecular Systems, Portland, OR, United States
The Production of Reactive Oxygen Species and Subsequent Abiotic Oxidation of Mn(II) in the Mixing Zone of Hydrothermal Vents at Nine North (311143)
Timothy J Shaw1, George W Luther III2, Richard E Rosas3, Veronique Oldham3, Nicole R Coffey3, John L Ferry1 and Muditha Dias1, (1)University of South Carolina Columbia, Chemistry and Biochemistry, Columbia, SC, United States, (2)University of Delaware, College of Earth, Ocean and Environment, Lewes, DE, United States, (3)University of Delaware, College of Earth, Ocean, and Environment, Lewes, DE, United States
The Influence of Bacteria on the Geochemical Cycling of Mn(III) (314491)
Mitchell Henry Wright1, Veronique Oldham2, Matthew William Jones3, Aubin Thibault de Chanvalon4, Alfonso Mucci5, George W Luther III6 and Bradley Tebo1, (1)Oregon Health & Science University, Environmental and Biomolecular Systems, Portland, OR, United States, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)Pohang University of Science and Technology, Environmental Science and Engineering, South Korea, (4)University of Delaware, College of Earth, Ocean, and Environment, Lewes, DE, United States, (5)McGill University, Department of Earth and Planetary Sciences, Montreal, QC, Canada, (6)University of Delaware, College of Earth, Ocean and Environment, Lewes, DE, United States
More Clear than Mud: Dating Deep-Sea Clays with Osmium Isotopes to Unravel Seawater Metal Cycling through the Cenozoic (312916)
Logan Ashley Tegler1,2, Ann G Dunlea2, Stephen J Romaniello3, Ariel D Anbar1,4 and Tristan J Horner2, (1)Arizona State University, School of Molecular Sciences, Tempe, AZ, United States, (2)NIRVANA Laboratories, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, (4)Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States
The impact of seawater inflow on molybdenum cycling in the intermittently euxinic Gotland Deep, Central Baltic Sea (316589)
Florian Scholz, Matthias Baum, Christopher Siebert, Andrew Dale and Stefan Sommer, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Cryptic sulfur cycling in the Cariaco Basin (311372)
Mary I Scranton1, Volker Bruchert2, Virginia P Edgcomb3, Maria Pachiadaki4, Jaimie Rojas5, Elizabeth Suter6 and Gordon T Taylor6, (1)Stony Brook University, School of Marine & Atmospheric Sciences, Stony Brook, NY, United States, (2)Stockholm University, Geological Sciences and Bolin Centre for Climate Research, Stockholm, Sweden, (3)Woods Hole Oceanographic Inst, Geology and Geophysics Department, Woods Hole, MA, United States, (4)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States, (5)Margarita Marine Research Station of Fundación La Salle de Ciencias Naturales, Porlamar, Venezuela, (6)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States

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