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:
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:  Adam Martiny, University of California Irvine, Earth System Science, Irvine, CA, United States and Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, NH, 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, NH, United States

Abstracts Submitted to this Session:

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 Fu7, Mak A Saito8, David A Hutchins7 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, CA, 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)University of Southern California, Los Angeles, CA, United States, (8)WHOI, Woods Hole, MA, United States
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
Documenting shifts in diatom physiology across a natural nutrient gradient in the western North Atlantic (653276)
Sarah Lerch1, Matthew Harke2, Samantha Setta3, Tatiana A Rynearson3, Sonya Dyhrman4 and Bethany D. Jenkins5, (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, (5)University of Rhode Island, Narragansett, RI, United States
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
Synergistic Effects of Combined Viral and Protistan Predation on Marine Cyanobacterium Synechococcus Physiology (651595)
Sheri Floge1, Cristina Howard-Varona2, Simon Roux3, Benjamin Bowen4, Rebecca Lau5, Sarah M Schwenck6, Samuel Schwartz7, Tanja Woyke8, Trent Northen4 and Matthew B Sullivan9, (1)Wake Forest University, Biology, Winston-Salem, NC, United States, (2)Ohio State University Main Campus, Microbiology, Columbus, OH, United States, (3)Joint Genome Institute, Environmental Genomics, Walnut Creek, CA, United States, (4)Lawrence Berkeley National Laboratory, Joint Genome Institute, Berkeley, United States, (5)Lawrence Berkeley National Lab, Berkeley, CA, United States, (6)Scripps Institution of Oceanography, La Jolla, CA, United States, (7)Wake Forest University, Biochemistry and Molecular Biology, Winston-Salem, NC, United States, (8)DOE Joint Genome Institute, Walnut Creek, CA, United States, (9)Ohio State University Main Campus, Microbiology, Columbus, United States
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
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