B41A:
Marine Silica Cycle, Silicification, and Silicifiers I


Session ID#: 11466

Session Description:
Silicification is a key biogeochemical process in the ocean and yet the extent of silicification throughout the different domains of life, its evolution, and its role are questions that are yet to be resolved. This session aims to address key questions related to the biogeochemical silica cycle of the world ocean, and to develop a transdisciplinary approach (including chemistry, biogeochemistry, biochemistry, physiology, genomics) of silicification processes and of marine silicifiers (pelagic and benthic diatoms, silicoflagellates, choanoflagellates, radiolaria, siliceous sponges and potentially picocyanobacteria). The session will aim to contextualize recent advances in the ecology, evolution, biology and genomics of silicifying organisms. In parallel, we will aim to cover advances relating to the biogeochemical cycles of the two polar oceans as well as of that of coastal zones and of continental margins.
Primary Chair:  Paul J Treguer, University of Western Brittany, Brest, France
Chairs:  Chris Bowler, Ecole Normale Supérieure, Institut de Biologie/Ecology and Evolutionary Biology Section, Paris, France, Mark A Brzezinski, University of California, Marine Science Institute, Santa Barbara, CA, United States and Stephen B Baines, Stony Brook University, Stony Brook, NY, United States
Moderators:  Stephen B Baines, Stony Brook University, Stony Brook, NY, United States and Mark A Brzezinski, University of California Santa Barbara, Santa Barbara, CA, United States
Student Paper Review Liaison:  Stephen B Baines, Stony Brook University, Stony Brook, NY, United States
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • HE - High Latitude Environments
  • ME - Marine Ecosystems
  • MM - Microbiology and Molecular Biology
  • PP - Phytoplankton and Primary Production

Abstracts Submitted to this Session:

B41A-01
Patterns and Regulation of Silicon Accumulation in Synechococcus spp. (87083)
Mark A Brzezinski, University of California Santa Barbara, Santa Barbara, CA, United States, Jeffrey W Krause, Dauphin Island Sea Lab, Dauphin Island, AL, United States, Benjamin S Twining, Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States, Stephen B Baines, Stony Brook University, Stony Brook, NY, United States and Jackie Collier, Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States
B41A-02
GLOBAL PATTERNS OF DIATOM DIVERSITY DERIVED FROM THE TARA OCEANS EXPEDITION (87350)
Chris Bowler1, Shruti Malviya1, Colomban de Vargas2, Stephane Audic2, Adriana Zingone3, Eleonora Scalco3, Daniele Iudicone4, Flora Vincent1, Lucie Bittner5, Patrick Wincker6 and Julie Poulain6, (1)Ecole Normale Supérieure, Institut de Biologie/Ecology and Evolutionary Biology Section, Paris, France, (2)Station Biologique de Roscoff, UPMC, Roscoff, France, (3)Stazione Zoologica, Napoli, Italy, (4)Stazione Zoologica Anton Dohrn, Naples, Italy, (5)Sorbonne Universités, Institut de Biologie Paris-Seine, Paris, France, (6)Genoscope, Evry, France
B41A-03
Silicon stable isotope constraints on the role of the subpolar North Pacific in the marine Si cycle (91174)
Gregory F de Souza1, Colin Maden1, Florian Wetzel2, Hajime Obata3 and Derek Vance1, (1)ETH Zurich, Institute of Geochemistry and Petrology, Zurich, Switzerland, (2)formerly at ETH Zurich, Institute of Geochemistry and Petrology, Zurich, Switzerland, (3)The University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan
B41A-04
Diatomaceous Ocean Weathering, a new gateway of dissolved silica to the oceans: new supportive evidence (89331)
Tasuku Akagi, Mariko Emoto and Hirotaka Nishino, Kyushu University, Earth and Planetary Sciences, Fukuoka, Japan
B41A-05
Silicate Pumping of Excess Carbon in Coastal Upwelling Ecosystems (90448)
Richard C Dugdale, San Francisco State University, San Francisco, CA, United States
B41A-06
Impact Of Growth Stress On Diatom BSiO2 Structure And Recycling (90839)
Brivaëla Moriceau1, Julia Boutorh2, Morgane Gallinari2, Charlotte Soler2 and Olivier G Ragueneau1, (1)CNRS, LEMAR, IUEM Institut Universitaire Européen de la Mer, Plouzané, France, (2)IUEM Institut Universitaire Européen de la Mer, LEMAR, Plouzané, France
B41A-07
Searching for Potential Silicon-associated Genes in Cyanobacteria (92251)
Jackie Collier1, Mark A Brzezinski2, Stephen B Baines3, Jeffrey W Krause4, Daniel Ohnemus5 and Benjamin S Twining5, (1)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States, (2)University of California Santa Barbara, Santa Barbara, CA, United States, (3)Stony Brook University, Stony Brook, NY, United States, (4)Dauphin Island Sea Lab, Dauphin Island, AL, United States, (5)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States
B41A-08
Pumping Iron and Silica Bodybuilding (88404)
Heather Mcnair1, Mark A Brzezinski2, Jeffrey W Krause3, Claire Parker4, Matthew Brown5, Tyler Coale6 and Kenneth W Bruland4, (1)University of California Santa Barbara, Ecology Evolution and Marine Biology, Santa Barbara, CA, United States, (2)University of California Santa Barbara, Santa Barbara, CA, United States, (3)Dauphin Island Sea Lab, Dauphin Island, AL, United States, (4)University of California Santa Cruz, Santa Cruz, CA, United States, (5)Flagler College, Natural Sciences, St Augustine, FL, United States, (6)Scripps Institution of Oceanography, La Jolla, CA, United States
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