BN017:
New insights into marine N2 fixation: from single cells to ecosystems


Session ID#: 27975

Session Description:
The availability of combined nitrogen (N) influences the productivity of marine environments. The main source of N to the open ocean is biologically-mediated dinitrogen (N2) fixation. Our understanding of N2 fixation has greatly increased in the past two decades, including recognizing new habitats, new organisms, and new lifestyles of the microbes carrying out this process. Methodological developments and improvements, e.g., single-cell techniques and isotope tracer experiments, have enhanced our capabilities to better quantify bulk N2 fixation rates and to assess the contributions of individual organisms and the environmental regulation. Despite the known importance of N2 fixation for marine productivity, there is, however, still a lack of knowledge about which N2 fixers are biogeochemically relevant in most regions of the world ocean, how variable the activity is spatially and temporally, which factors influence the activity and distribution in the environment, and whether N2 fixation in the modern ocean can quantitatively account for oceanic N loss. This session invites contributions from biogeochemists, microbial ecologists, and oceanographers to share new insights on marine N2 fixation at the single-cell, population, ecosystem and global level including experimental, observation and modeling approaches.
Primary Chair:  Wiebke Mohr, Max Planck Institute for Marine Microbiology, Biogeochemistry, Bremen, Germany
Co-chairs:  Sven Alexander Kranz, Florida State University, Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States and Angela N Knapp, Florida State University, Tallahassee, FL, United States
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4815 Ecosystems, structure, dynamics, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4870 Stable isotopes [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • MM - Microbiology and Molecular Ecology
  • OM - Ocean Modeling
  • PC - Past, Present and Future Climate
  • PE - Pelagic Ecosystems
    *Use ME: Marine Ecosystems*

Abstracts Submitted to this Session:

Zuozhu Wen, Wenfang Lin, Rong Shen, Haizheng Hong, Shuh-Ji Kao and Dalin Shi, Xiamen University, Xiamen, China
Raes Raes1, Levente Bodrossy2, Jodie van de Kamp2 and Anya M Waite3, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)CSIRO Marine and Atmospheric Research Hobart, Hobart, Australia, (3)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany
Ken Furuya, Soka University, Hachioji, Japan, Sachiko Horii, The University of Tokyo, Department of Aquatic Bioscience, Tokyo, Japan, Kazutaka Takahashi, The University of Tokyo, Bunkyo-Ku, Japan, Takuhei Shiozaki, JAMSTEC, Yokosuka, Japan and Fuminori Hashihama, Tokyo University of Marine Science and Technology, Tokyo, Japan
Judith Meyer, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Arvind Singh, GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany; Physical Research Laboratory, Ahmedabad, India and Ulf Riebesell, GEOMAR, Kiel, Germany
MAR Benavides, University of Copenhagen, Marine Biological Section, København K, Denmark, Pia Moisander, University of Massachusetts Dartmouth, MA, United States, Katie Watkins-Brandt, Oregon State Univ, Corvallis, OR, United States, Angelicque E White, Oregon State University, Corvallis, OR, United States, Elana Jasmine Ames, University of Rhode Island, Narragansett, RI, United States, Jaime B Palter, University of Rhode Island, Kingston, RI, United States, Julie Granger, University of Connecticut, Department of Marine Sciences, Groton, CT, United States and Lasse Riemann, University of Copenhagen, Marine Biological Section, Helsingor, DE, Denmark
Ondřej Prášil, Takako Masuda, Gabor Bernat, Martina Beckova, Eva Kotabova, Evelyn Lawrenz, Martin Lukes and Josef Komenda, Institute of Microbiology, Czech Academy of Sciences, Center Algatech, Třeboň, Czech Republic
Corday Selden1, Dreux Chappell1, Brittany Widner2, Alfonso Macías Tapia1, Peter W Bernhardt1 and Margaret R Mulholland1, (1)Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States, (2)Woods Hole Oceanographic Institution, MA, United States
Elana Jasmine Ames, University of Rhode Island, Narragansett, RI, United States; Coastal Carolina University, Conway, SC, United States, Jaime B Palter, University of Rhode Island, Kingston, RI, United States, Pia Moisander, University of Massachusetts Dartmouth, MA, United States, MAR Benavides, University of Copenhagen, Marine Biological Section, København K, Denmark, Julie Granger, University of Connecticut, Department of Marine Sciences, Groton, CT, United States, Katie Watkins-Brandt, Oregon State Univ, Corvallis, OR, United States and Angelicque E White, Oregon State University, Corvallis, OR, United States
Ya-Wei Luo, Xiamen University, Xiang'an, China, Dalin Shi, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China and Haizheng Hong, Xiamen University, Xiamen, China
Allison A. Fong1, Raes Raes2 and Anya M Waite1, (1)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany
Weiyi Tang1, Nicolas Cassar1,2, Seaver Wang1, Debany Fonseca Batista3, Frank Dehairs3, Scott Michael Gifford4, Aridane Gonzalez2 and Hélène Planquette2, (1)Duke University, Earth and Ocean Sciences, Nicholas School of the Environment, Durham, NC, United States, (2)IUEM Institut Universitaire Européen de la Mer, LEMAR, Plouzané, France, (3)Vrije Universiteit Brussel, Analytical, Environmental and Geo-Chemistry, Ixelles, Belgium, (4)University of North Carolina at Chapel Hill, Marine Sciences, Chapel Hill, NC, United States
Shun Yan Cheung, The Hong Kong University of Scienceand Technology, Clear Water Bay, Hong Kong, Koji Suzuki, Hokkaido Univ, Sapporo, Japan, Shin-ichiro Nakaoka, CGER/NIES, Tsukuba, Japan, Hisashi Endo, Kyoto University, Institute for Chemical Research, Japan and Hongbin Liu, HKUST, Kowloon, Hong Kong
Run Zhang, Danyang Li and Shengbao Chen, Xiamen University, Xiamen, China
Katie Jean Harding1, Kendra Turk-Kubo1, Rachel E Sipler2, Deborah Ann Bronk3 and Jonathan P Zehr1, (1)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (2)Virginia Institute of Marine Science, Gloucester Point, VA, United States, (3)College William & Mary/VIMS, Gloucester Point, VA, United States
Matthew M Mills1, Kendra A Turk-Kubo2, Samuel T Wilson3, Kevin R Arrigo1 and Jonathan P Zehr4, (1)Stanford University, Earth System Science, Stanford, CA, United States, (2)UC Santa Cruz, Ocean Sciences, CA, United States, (3)Daniel K. Inouye Center for Microbial Oceanography: Research and Education, University of Hawaii at Manoa, Honolulu, HI, United States, (4)UC Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States
Francois Primeau1, Weilei Wang2, Adam Martiny2 and J. Keith Moore2, (1)University of California Irvine, Irvine, CA, United States, (2)University of California, Irvine, Earth System Science, Irvine, CA, United States
Margaret R Mulholland1, Peter W Bernhardt2, Kimberly Hyde3, Antonio Mannino4, Brittany Widner5, Dreux Chappell1 and Corday Selden6, (1)Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States, (2)Old Dominion University, Department of Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States, (3)NOAA Fisheries Northeast Fisheries Science Center, Narragansett, RI, United States, (4)NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Greenbelt, United States, (5)Woods Hole Oceanographic Institution, MA, United States, (6)Cuernavaca, Mexico