Subsurface and Subseasonal Productivity: Mechanisms, Magnitudes, Variability, and Key Species III Posters

Session ID#: 9342

Session Description:
Our understanding of oceanic primary production and producers has been dominated by sampling of the surface ocean (typically < 20m). Similarly, our knowledge of global patterns of primary production has been led by ocean colour measurements from satellite sensors that again, have surface bias. During the 20th Century there were few systematic attempts to target the subsurface resulting in a gap dating back to Schimper’s pioneering use of closing nets on the 1898 Valdivia cruise. Over the past two decades, however, a burgeoning suite of observations has highlighted the significance of subsurface production. A range of mechanisms have been identified including the ability to grow in low light in subsurface chlorophyll maxima, exploitation of mixing events at the pycnocline/ nutricline, buoyancy regulation allowing the mining of deep nutrients. Significantly, new research is also demonstrating that this subsurface production may be of major significance for carbon export. With climate change driving increased ocean stratification, these styles of subsurface production may become more significant so it is timely to focus on them. This session will aim to bring together observation, theory and modelling of the subsurface to synergistically improve understanding and to identify new targets and priorities for research.
Primary Chair:  Alan E S Kemp, University of Southampton, Southampton, SO14, United Kingdom
Chairs:  Bror F Jonsson1, Tracy A Villareal2 and Joseph Salisbury II1, (1)University of New Hampshire, Durham, NH, United States(2)The University of Texas at Austin, Port Aransas, TX, United States
Moderators:  Alan E S Kemp, University of Southampton, Southampton, SO14, United Kingdom and Bror F Jonsson, University of New Hampshire, Durham, NH, United States
Student Paper Review Liaison:  Alan E S Kemp, University of Southampton, Southampton, SO14, United Kingdom
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4858 Population dynamics and ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
  • B - Biogeochemistry and Nutrients
  • ME - Marine Ecosystems
  • MM - Microbiology and Molecular Biology
  • PC - Past, Present and Future Climate

Abstracts Submitted to this Session:

Seasonal Variability in Phytoplankton Responses to Water Accommodated Petroleum Hydrocarbons in the Northern Gulf of Mexico (93405)
Liesl Kiera Cole1,2, Jeffrey W Krause1,2 and Kimberlee Thamatrakoln3, (1)University of South Alabama, Department of Marine Sciences, Mobile, AL, United States, (2)Dauphin Island Sea Lab, Dauphin Island, AL, United States, (3)Rutgers University, New Brunswick, NJ, United States
Chlorophyll Dynamics in the Southern California Bight (87609)
Craig Gelpi, Catalina Marine Society, Lake Balboa, CA, United States
Ocean mesoscale eddies and vertical motion (90332)
Ananda Pascual1, Peter Gaube2, Evan Mason1, Bàrbara Barceló-Llull3 and Simon Ruiz4, (1)IMEDEA(CSIC-UIB), Department of Marine Technologies and Operational Oceanography, Esporles, Spain, (2)Applied Physics Laboratory at the University of Washington, Air-Sea Interaction and Remote Sensing, Seattle, WA, United States, (3)Universidad de Las Palmas de Gran Canaria, Departamento de Física, Las Palmas de Gran Canaria, Spain, (4)IMEDEA (CSIC-UIB), Marine Technologies, Operational Oceanography and Sustainability, Esporles, Spain
Seasonal variation of the phytoplankton in the Southern Atlantic Ocean (18°20'-21°S - 41-37°W) (93458)
Silvana Vianna Rodrigues1, Marcelo Manzi Marinho2, Vinnicius Brant1, Jonas França-Junior1, Cassia Jonck1, Venina Ferreira3 and Eduardo Marcon3, (1)Universidade Federal Fluminense, Analytical Chemistry, Niterói, Brazil, (2)Universidade do Estado do Rio de Janeiro, Biology, Rio de Janeiro, Brazil, (3)PETROBRAS, CENPES, Rio de Janeiro, Brazil
Mixed layer depth and chlorophyll a: profiling float observations in the Kuroshio-Oyashio Extension region (87794)
Sachihiko Itoh, Atmos. & Ocean Res. Institute, Kashiwa, Japan
Elucidating the Relationship Between Phytoplankton and Primary Production in the Sargasso Sea Using New Observations of Nanoplankton and Picoplankton. (88418)
Julia Matheson1, Rodney J Johnson1, Nicholas Robert Bates1 and Rachel Jane Parsons2, (1)Bermuda Institute of Ocean Sciences, BATS, St. George's, Bermuda, (2)Bermuda Institute for Ocean Sciences, BIOS, St. George's, Bermuda
Photophysiology and Light Absorption Properties of the Phytoplankton Community in the Northern Gulf Of Mexico (89880)
Sumit Chakraborty, University of Massachusetts-Dartmouth, SMAST, New Bedford, MA, United States, Steven E Lohrenz, University of Massachusetts Dartmouth, New Bedford, MA, United States and Kjell Gundersen, Institute of Marine Research, Bergen, Norway
Continuous Silicate Utilization Over Multiple 14L:10D Day:Night Cycles Confirms Night Metabolism in Lake Michigan Diatom Enrichments Using Either Nitrate or Ammonium as a Nitrogen Source (91467)
Michelle Soderling, Carmen Aguilar and Russell Lee Cuhel, University of Wisconsin Milwaukee, Milwaukee, WI, United States
Picocyanobacteria Dominance in Deep Biomass Layers: Relation to Diatom Presence and Episodic Events. (93034)
Carmen Aguilar and Russell Lee Cuhel, University of Wisconsin Milwaukee, Milwaukee, WI, United States
Nutrient Interactions of Deep Phytoplankton Biomass Layers in Lake Michigan and Modeling of Layer Conditions (93668)
Lily Gierke, Bree Kotwitz, Lauren Engen and John Williams, University of Wisconsin Milwaukee, Milwaukee, WI, United States
Are Small Diatoms Capable of Positive Buoyancy? (89227)
Eduardo Perez Vega, Universidad de Puerto Rico Bayamon, Biology, Manati, PR, United States, Genesok Oh, The University of Texas at Austin Marine Science Institute, Port Aransas, TX, United States and Tracy A Villareal, University of Texas at Austin, Austin, TX, United States
The Importance of Subsurface Production for Carbon Export – Evidence from Past Oceans (89491)
Alan E S Kemp, University of Southampton, Southampton, SO14, United Kingdom
Seasonal effects on the population structure of Prochlorococcus in the North Pacific Ocean (93392)
Benjamin Carter Calfee1, Zackary I Johnson2, Steven Wilhelm1 and Erik R Zinser1, (1)University of Tennessee, Microbiology, Knoxville, TN, United States, (2)Duke University, Beaufort, NC, United States
Increase in Dominance of Eukaryote Over Prokaryote Phytoplankton Biomass Between the Surface and the Deep Chlorophyll Maximum in the Summertime Western North Atlantic Ocean (92904)
Robert D Vaillancourt, Millersville University of Pennsylvania, Millersville, PA, United States, Veronica P Lance, NOAA/NESDIS/STAR, College Park, MD, United States, Bruce R Hargreaves, Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States and John F Marra, CUNY Brooklyn College, Brooklyn, NY, United States
Seasonal Variation of Phytoplankton and Primary Production in the Thames River, Southeastern Connecticut (93494)
Sam C. Wainright, US Coast Guard Academy, New London, CT, United States
Small-Scale Spatial Dynamics of Phytoplankton in Apalachicola Bay, Florida, a River-Dominated Estuary (93412)
Natalie L Geyer1, Markus H Huettel1 and Michael Wetz2, (1)Florida State University, Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States, (2)Texas A&M University - Corpus Christi, Life Sciences, Corpus Christi, TX, United States
Global Marine Productivity and Living-Phytoplankton Carbon Biomass Estimated from a Physiological Growth Model (88676)
Lionel Arteaga, Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States, Markus Pahlow, GEOMAR Helmholtz Centre for Ocean Research Kiel, Marine Biogeochemistry, Kiel, Germany and Andreas Oschlies, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Predicting global oceanic net primary productivity with reduced-dimension, linear dynamical spatiotemporal models (89744)
Fernando Gonzalez1, Andrew Barton1 and Charles A Stock2, (1)Princeton University Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (2)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States