B33A:
The Current and Future Nitrogen Cycle: From Microbes to the Global Ocean II


Session ID#: 11529

Session Description:
New developments in nitrogen biogeochemistry were the subject of a session at the Ocean Sciences Meeting thirty years ago. Since then there have been many unexpected discoveries and new tools have been developed not only for studying the nitrogen cycle, but also for integrating the nitrogen cycle with other biogeochemical cycles and for extrapolating over space and time. This session will cover all aspects of the nitrogen cycle, from unanswered questions remaining from 3 decades ago, to newly discovered processes and features of nitrogen cycling in the global ocean. Speakers will be encouraged not only to talk about their recent work and discoveries, but to reserve time and present a slide on what they see as the future important and significant questions for understanding the global ocean nitrogen cycle, its biogeochemical interactions and impacts of global climate change.
Primary Chair:  Angela Landolfi, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Chairs:  Wolfgang Koeve, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Lauren M Zamora, University of Maryland, College Park, Greenbelt, MD, United States
Moderators:  Angela Landolfi, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Lauren M Zamora, University of Maryland, College Park, Greenbelt, MD, United States
Student Paper Review Liaisons:  Angela Landolfi, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Wolfgang Koeve, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
9399 General or miscellaneous [GEOGRAPHIC LOCATION]
Co-Sponsor(s):
  • IS - Instrumentation & Sensing Technologies
  • MM - Microbiology and Molecular Biology
  • PC - Past, Present and Future Climate
  • PP - Phytoplankton and Primary Production

Abstracts Submitted to this Session:

B34B-0355
Differential Effects of Nitrate (NO3-), Ammonium (NH4+) and Urea on Phytoplankton Communities in the North Pacific Subtropical Gyre. (91820)
Matthew M Mills1, Irina N Shilova2, Julie Robidart3, Karin M Bjorkman4, Gert van Dijken1, Kendra Turk-Kubo2, Zbigniew Kolber5, Eric P. Achterberg6, Matthew J Church4, Kevin R Arrigo1 and Jonathan P Zehr2, (1)Stanford University, Earth System Science, Stanford, CA, United States, (2)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (3)National Oceanographic Centre, Southampton, United Kingdom, (4)University of Hawaii at Manoa, Honolulu, HI, United States, (5)University of California, Institute of Marine Sciences, Santa Cruz, CA, United States, (6)Geomar - Hemholtz Centre for Ocean Research, Chemical Oceanography, Kiel, Germany
B33A-02
Why Fix N2 in High N Supply Regions? (91094)
Angela Landolfi1, Wolfgang Koeve1 and Andreas Oschlies2, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Marine Biogeochemical Modeling, Kiel, Germany, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
B33A-03
Bridging the low nitrogen Pacific with the high nitrogen Atlantic using Arctic N2/Ar and N* measurements (88128)
Jennifer Reeve and Roberta Claire Hamme, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
B34B-0353
Deepwater Nitrogen Fixation: Who's Doing it, Where, and Why? (93009)
Joseph Peter Montoya, Georgia Institute of Technology Main Campus, Atlanta, GA, United States, Sarah C. Weber, Leibniz Institute for Baltic Sea Research (IOW), Biological Oceanography, Warnemünde, Germany, Angela Vogts, Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany, Maren Voss, Leibniz Institute for Baltic Sea Research Warnemuende (IOW), Biological Oceanography, Rostock, Germany, Matthew Saxton, Univ Georgia, Athens, GA, United States and Samantha Benton Joye, University of Georgia, Athens, GA, United States
B33A-05
GRAZING BY ZOOPLANKTON ON DIAZOTROPHS IN THE AMAZON RIVER PLUME AND WESTERN TROPICAL NORTH ATLANTIC (91190)
Brandon Conroy1, Deborah K Steinberg1, Bongkeun Song1 and Rachel Foster2, (1)Virginia Institute of Marine Science, Biological Sciences, Gloucester Point, VA, United States, (2)Stockholm University, Department of Ecology, Environment and Plant Sciences, Stockholm, Sweden
B33A-06
Incorporating Prognostic Marine Nitrogen Fixers and Related Bio-Physical Feedbacks in an Earth System Model (91194)
Hanna Paulsen, Tatiana Ilyina and Katharina Dorothea Six, Max Planck Institute for Meteorology, Hamburg, Germany
B33A-07
Ocean Biogeochemical Feedbacks Limit the Impact of Atmospheric Nitrogen Deposition on Marine Productivity (89373)
Christopher J Somes, Angela Landolfi, Wolfgang Koeve and Andreas Oschlies, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
B33A-08
The nitrogen cycle during the Anthropocene (91220)
Simon Yang, ETH Zurich, Environmental Systems Science, Zurich, Switzerland and Nicolas Gruber, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
See more of: Biogeochemistry and Nutrients