OB52C:
Structure, Function, and Biogeochemical Role of Plankton Communities in the Nutrient-Limited Open Ocean II

Session ID#: 93189

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:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4815 Ecosystems, structure, dynamics, and modeling [OCEANOGRAPHY: BIOLOGICAL]
4817 Food webs, structure, and dynamics [OCEANOGRAPHY: BIOLOGICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: CHEMICAL]
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, Kingston, RI, United States and Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, United States
Primary Liaison:  Tatiana A Rynearson, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
Moderators:  Adam Martiny, University of California Irvine, Earth System Science, Irvine, CA, United States and Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, United States
Student Paper Review Liaisons:  Adam Martiny, University of California Irvine, Earth System Science, Irvine, CA, United States and Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, United States

Abstracts Submitted to this Session:

OB52C-01
Defining Conserved Epibiotic Bacterial Genomes in the Trichodesmium Holobiont Using New Isolate Genomes and Field ‘Omic Techniques (646828)
Eric A Webb1, Yiming Zhao2, Noelle Held3, Elaina D Graham4, Asa Conover5, Jacob Semones5, Yuan Yuan Feng6, Feixue Fu2, Mak A Saito7, David A Hutchins2 and Michael D Lee1, (1)University of Southern California, Marine and Environmental Biology, Los Angeles, CA, United States, (2)University of Southern California, Department of Biological Sciences, Los Angeles, United States, (3)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (4)University of Southern California, Marine & Environmental Biology, CA, United States, (5)University of Southern California, Marine and Environmental Biology Section, Los Angeles, CA, United States, (6)Tianjin University of Science and Technology, College of Marine and Environmental Sciences,, Tianjin, China, (7)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, United States
OB52C-02
Decoupling Between N:P Ratios of Particulate Organic Matter and Seawater (646219)
Chia-Te Chien, Markus Pahlow and Andreas Oschlies, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
OB52C-03
Documenting shifts in diatom physiology across a natural nutrient gradient in the western North Atlantic (653276)
Sarah Lerch1, Matthew Harke2, Samantha Setta, MS, Phd3, Tatiana A Rynearson3, Sonya Dyhrman4 and Bethany D. Jenkins3, (1)University of Rhode Island, Kingston, RI, United States, (2)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (4)Columbia University, Lamont-Doherty Earth Observatory, Palisades, NY, United States
OB52C-04
Production and cross-feeding of nitrite in Prochlorococcus populations (643858)
Paul Berube1, Tyler J O'Keefe1, Anna Nichole Rasmussen2 and Sallie W Chisholm1, (1)Massachusetts Institute of Technology, Civil and Environmental Engineering, Cambridge, MA, United States, (2)Stanford University, Earth System Science, Stanford, CA, United States
OB52C-05
Synergistic Effects of Combined Viral and Protistan Predation on Marine Cyanobacterium Synechococcus Physiology (651595)
Sheri Floge, Wake Forest University, Winston-Salem, NC, United States, Cristina Howard-Varona, Ohio State University Main Campus, Microbiology, Columbus, OH, United States, Simon Roux, Joint Genome Institute, Environmental Genomics, Walnut Creek, CA, United States, Benjamin Bowen, Lawrence Berkeley National Laboratory, Joint Genome Institute, Berkeley, United States, Rebecca Lau, Lawrence Berkeley National Lab, Berkeley, CA, United States, Sarah M Schwenck, Scripps Institution of Oceanography, La Jolla, CA, United States, Samuel Schwartz, Wake Forest University, Biochemistry and Molecular Biology, Winston-Salem, NC, United States, Tanja Woyke, DOE Joint Genome Institute, Walnut Creek, CA, United States, Trent Northen, Lawrence Berkeley National Laboratory, Berkeley, United States and Matthew B Sullivan, Ohio State University Main Campus, Microbiology, Columbus, United States
OB52C-06
Induced Nutrient Assimilation in Oligotrophs: Not Beneficial, Not Possible, Both or Neither? (643431)
Stephen Noell1, Ferdi Hellweger2 and Stephen J Giovannoni1, (1)Oregon State University, Department of Microbiology, Corvallis, OR, United States, (2)Technical University of Berlin, Water Quality Engineering, Berlin, Germany
OB52C-07
Understanding the Role of Nutrient Limitation on Plankton Biomass over Arabian Sea via 1-D Coupled Biogeochemical Model and Bio-Argo Observations. (640443)
Anju Mallissery1, Sreeush M G1, Vinu Valsala1, Smitha B R2, Faseela Hamza3, Bharathi G4 and Chennu Venkateswara Naidu4, (1)Indian Institute of Tropical Meteorology, Pune, India, (2)Centre for Marine Living Resources and Ecology, Ministry of Earth Sciences, Kochi, India, (3)Indian Institute of Tropical Meteorology, Development of Skilled Manpower in Earth System Science, Pune, India, (4)Andhra University, Department of Meteorology and Oceanography, Vishakhapatnam, India
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