OB51C:
Structure, Function, and Biogeochemical Role of Plankton Communities in the Nutrient-Limited Open Ocean I

Session ID#: 93185

Session Description:
The nearly constant nutrient limitation found in ocean gyres and high nutrient low chlorophyll (HNLC) regions yields unique planktonic communities with particular morphological, physiological, and behavioral adaptations. Recent work has demonstrated new and previously unrecognized links in nutrient limited regions between plankton biodiversity and trophic interactions, dissolved nutrients, the cycling of organic matter, and ocean biogeochemical functioning. These efforts include new interdisciplinary field programs (e.g. EXPORTS, BIOS-SCOPE), long-term time series (e.g. BATS, HOT), and new technologies (AUVs, 'omics approaches). This session will examine how adaptations to oligotrophic conditions influence planktonic community structure and function, including mechanisms governing cellular resource requirements and utilization or production of DOM. We invite contributions that include field, laboratory, theoretical and modeling efforts to identify and understand how plankton composition, physiology and metabolism influence food web structure, elemental composition, DOM cycling, energy transfer, and carbon export in nutrient constrained environments. We anticipate a lively session covering a diverse range of organisms (from viruses to zooplankton) and the interactions between them.
Co-Sponsor(s):
  • CT - Chemical Tracers, Organic Matter and Trace Elements
  • ME - Marine Ecology and Biodiversity
  • MM - Microbiology and Molecular Ecology
  • MM - Microbiology and Molecular Ecology
  • NC - Nutrient Cycling
  • NC - Nutrient Cycling
Index Terms:
Primary Chair:  Tatiana A Rynearson, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
Co-chairs:  Adam Martiny, University of California Irvine, Earth System Science, Irvine, CA, United States, Bethany D. Jenkins, University of Rhode Island, Cell and Molecular Biology, Narragansett, RI, United States and Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, NH, United States
Primary Liaison:  Tatiana A Rynearson, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
Moderators:  Tatiana A Rynearson, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States and Bethany D. Jenkins, University of Rhode Island, Cell and Molecular Biology, Narragansett, RI, United States
Student Paper Review Liaisons:  Tatiana A Rynearson, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States and Bethany D. Jenkins, University of Rhode Island, Cell and Molecular Biology, Narragansett, RI, United States

Abstracts Submitted to this Session:

Pelagic Sargassum in the Western Tropical North Atlantic: Does the Amazon Plume Drive Sargassum Growth? (657516)
Joseph Peter Montoya1, Erica Kelley Strope1, Ajit Subramaniam2, Elana Jasmine Ames3, Richard N Peterson4, Mengqiu Wang5 and Chuanmin Hu6, (1)Georgia Institute of Technology, School of Biological Sciences, Atlanta, GA, United States, (2)Columbia University, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)Coastal Carolina University, Conway, SC, United States, (4)Coastal Carolina University, Coastal and Marine Systems Science, Conway, SC, United States, (5)Wuhan University, School of Remote Sensing and Information Engineering, Wuhan, China, (6)University of South Florida St. Petersburg, Optical Oceanography, St Petersburg, FL, United States
Assessing community metabolism and flexibility: metabolomics and microbial diversity across the North Pacific Transition Zone and in response to nutrient amendments (648526)
Angela Boysen1, Katherine Heal1, Mary Rose Gradoville2, Nicholas Hawco3, Bryndan Paige Durham1, Ryan D Groussman1, Laura T Carlson4, Paulina Pinedo-Gonzalez3, Francois Ribalet1, Jonathan P Zehr5, Randelle M Bundy1, Prof Seth John6, Virginia Armbrust1 and Anitra E Ingalls1, (1)University of Washington, School of Oceanography, Seattle, WA, United States, (2)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (3)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (4)University of Washington, School of Oceanography, Seattle, United States, (5)University of California, Ocean Sciences, Santa Cruz, CA, United States, (6)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
Community Interactions and Nutrient Concentrations Affect Diel Periodicity of Microbial Gene Expression in Oligotrophic Sunlit Waters. (657149)
Alice Vislova, University of Hawaii, Oceanography, Honolulu, HI, United States, Anna E Romano, Daniel K. Inouye Center for Microbial Oceanography: Research and Education, University of Hawaii at Manoa, Honolulu, HI, United States and John Eppley, University of Hawaii, United States
Proteomic assessment of nitrogen assimilation in the North Pacific Subtropical Gyre (647834)
Amy E Zimmerman1, Maureen Coleman2 and Jacob Waldbauer1, (1)University of Chicago, Geophysical Sciences, Chicago, IL, United States, (2)University of Chicago, Chicago, IL, United States
Herbivorous protist grazing balances phytoplankton growth in the North Pacific, leaving little primary production for export. (646240)
Heather Mcnair1, Françoise Morison2, Jason Graff3, Tatiana A Rynearson1 and Susanne Menden-Deuer1, (1)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (2)University of Rhode Island, Oceanography, Narragansett, RI, United States, (3)Oregon State University, Corvallis, OR, United States
Microbial Community Structure and Activities during EXPORTS as Revealed by Quantitative ‘Omics (655349)
Scott Michael Gifford, Garrett Sharpe, Acacia Zhao and Adrian Marchetti, University of North Carolina at Chapel Hill, Marine Sciences, Chapel Hill, NC, United States
Running Aground in Paradise: Community Differentiation as Plankton in the Nutrient Limited Open Ocean Encounter Coral Reefs. (650238)
Craig Nelson, University of Hawaiʻi at Mānoa, School of Ocean and Earth Science and Technology, Honolulu, HI, United States, James L Hench, Duke University, Nicholas School of the Environment, Beaufort, NC, United States, Jacqueline Comstock, University of California Santa Barbara, Ecology, Evolution, and Marine Biology, Santa Barbara, CA, United States, Craig A Carlson, University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, CA, United States, Kristina Remple, University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, Anna James, University of California at Santa Barbara, Marine Science, Santa Barbara, CA, United States, Libe Washburn, Marine Science Institute, Santa Barbara, CA, United States and Alice L Alldredge, University of California Santa Barbara, Santa Barbara, CA, United States
Impacts of dynamic plankton iron quotas on carbon cycle sensitivity to atmospheric iron deposition (655006)
Nicola A Wiseman, University of California Irvine, Earth System Science, Irvine, United States and Jefferson Keith Moore, University of California Irvine, Earth System Science, Irvine, CA, United States