OB52B:
Linking Microbial, Isotope, Micronutrient, and Other Approaches to Understand Carbon and Nutrient Cycling in the Ocean I

Session ID#: 93137

Session Description:
Marine biogeochemistry is critical to the ocean’s ability to regulate atmospheric concentrations of carbon dioxide and other greenhouse gases. Here we examine the nutrient and microbial processes that are important for sustaining the marine biological carbon pump (e.g. new/export production, nitrogen fixation, denitrification), focusing on the use of stable isotope probing, ‘omics’techniques, trace metals, radioisotopes, micro-nutrients, numerical simulations, and more. The goal of this session is to bring together marine biogeochemists using these various methods to obtain a more accurate view of biologically-related elemental cycling in the ocean—from microbes to macro fauna.
Co-Sponsor(s):
  • CT - Chemical Tracers, Organic Matter and Trace Elements
  • ME - Marine Ecology and Biodiversity
Index Terms:

4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: CHEMICAL]
4870 Stable isotopes [OCEANOGRAPHY: CHEMICAL]
Primary Chair:  Patrick A Rafter, University of California Irvine, Earth System Science, Irvine, United States
Co-chairs:  Alexis Pasulka, California Polytechnic State University, San Luis Obispo, Department of Biological Sciences, San Luis Obispo, CA, United States, Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, NH, United States and Katherine Dawson, Caltech MC 100-23, Pasadena, CA, United States
Primary Liaison:  Patrick A Rafter, University of California, Irvine, Earth System Science, Irvine, United States
Moderators:  Alexis Pasulka, California Polytechnic State University, San Luis Obispo, Department of Biological Sciences, San Luis Obispo, CA, United States and Patrick A Rafter, University of California, Irvine, Earth System Science, Irvine, United States
Student Paper Review Liaison:  Alexis Pasulka, California Polytechnic State University, San Luis Obispo, Department of Biological Sciences, San Luis Obispo, CA, United States

Abstracts Submitted to this Session:

Diatom physiology controls silicic-acid leakage in response to iron fertilization (639104)
Mark Holzer, University of New South Wales, Sydney, NSW, Australia, Benoit Pasquier, University of California Irvine, Irvine, CA, United States, Timothy J DeVries, University of California, Santa Barabara, Earth Research Institute and Department of Geography, Santa Barabara, United States and Mark A Brzezinski, University of California, Marine Science Institute, Santa Barbara, CA, United States
The Agulhas Current enhances the productivity of the subtropical Indian Ocean: evidence from coupled flow cytometry-high sensitivity nitrogen isotope analysis (646472)
Kolisa Yola Sinyanya1, Ruan Parrott1, Raquel Flynn1, David Y Walker Dr2, Yeongjun Ryu3, Daniel Mikhail Sigman4 and Fawcett Sarah1, (1)University of Cape Town, Oceanography, Cape Town, South Africa, (2)Cape Peninsula University of Technology, Conservation and Marine Sciences, Cape Town, South Africa, (3)Princeton University, Princeton, NJ, United States, (4)Princeton University, Geosciences, Princeton, United States
Atmospheric Dust Inputs, Iron Cycling, and Biogeochemical Connections in the South Pacific Gyre (646885)
Frank J Pavia1, Robert F Anderson2, Gisela Winckler3 and Martin Q Fleisher2, (1)California Institute of Technology, Pasadena, United States, (2)Lamont-Doherty Earth Obs, Palisades, NY, United States, (3)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States
Non-monotonic Export of Bacterially-derived Sinking Particulate Organic Matter to the Deep Ocean (647368)
Yuan Shen1, Thomas P Guilderson1,2 and Matthew McCarthy1, (1)University of California Santa Cruz, Ocean Sciences Department, Santa Cruz, CA, United States, (2)Lawrence Livermore National Laboratory, Center for Accelerator Mass Spectrometry, Livermore, CA, United States
Toward an Improved Understanding of the Subantarctic Biological Pump: Phytoplankton Group-specific Contributions to and Potential Drivers of Carbon Export in the Indian Sector of the Subantarctic Ocean (648136)
Heather Forrer1, Angela N Knapp2, Thomas G Bornman3, Rachel Thomas2, Samantha C Waterworth4, Rosemary Dorrington4 and Sarah Fawcett5, (1)Florida State University, Oceanography, Tallahassee, FL, United States, (2)Florida State University, Tallahassee, FL, United States, (3)South African Environmental Observation Network (SAEON), Elwandle Coastal Node, South Africa, (4)Rhodes University, Department of Biochemistry and Microbiology, South Africa, (5)University of Cape Town, Oceanography, Cape Town, South Africa
Organic Carbon Production and Remineralization in the Oligotrophic Water Column Assessed Using Compound-specific Stable Isotopic Composition of Particulate Fatty Acids (648299)
Maureen H Conte1, Becky Hopkins2, Marianna Karagiannis3, John C Weber4 and Rut Pedrosa Pamies4, (1)Bermuda Institute of Ocean Sciences, St.George's, Bermuda, (2)College of Wooster, Wooster, OH, United States, (3)University of Chicago, Chicago, IL, United States, (4)Marine Biological Laboratory, The Ecosystems Center, Woods Hole, MA, United States
Incorporating phytoplankton genomic traits into cellular resource allocation models (656026)
Catherine Garcia1, George Hagstrom2, Alyse Larkin3, Lucas Ustick4, Simon Levin2, Michael W Lomas5 and Adam Martiny1,4, (1)University of California Irvine, Earth System Science, Irvine, CA, United States, (2)Princeton University, Ecology and Evolutionary Biology, Princeton, NJ, United States, (3)University of California Irvine, Earth System Science, Irvine, United States, (4)University of California Irvine, Ecology and Evolutionary Biology, Irvine, CA, United States, (5)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States