B44A:
Marine Silica Cycle, Silicification, and Silicifiers II Posters


Session ID#: 9204

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:  Paul J Treguer, University of Western Brittany, Brest, France and Chris Bowler, Ecole Normale Supérieure, Institut de Biologie/Ecology and Evolutionary Biology Section, Paris, France
Moderators:  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
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:

 
B44A-0368
THE SOUTHERN OCEAN SILICA CYCLE: KNOWNS AND UNKNOWNS (88357)
Paul J Treguer, University of Western Brittany, Brest, France, Luc André, Royal Museum for Central Africa, Tervuren, Belgium, Jemma Wadham, School of Geographical Sciences, University of Bristol, Bristol, United Kingdom, Jon Hawkings, University of Bristol, School of Geographical Sciences, Bristol, BS8, United Kingdom and Manuel Maldonado, Centro de Estudios Avanzados de Blanes, Department of Marine Ecology, Blanes, Spain
 
B44A-0369
ROLE OF SYNECHOCOCCUS TO BIOGENIC SILICA CYCLING IN THE NORTH ATLANTIC (91941)
Stephen B Baines, Stony Brook University, Stony Brook, NY, United States, Benjamin S Twining, Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States, Jeffrey W Krause, Dauphin Island Sea Lab, Dauphin Island, AL, United States, Jackie Collier, Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States and Mark A Brzezinski, University of California Santa Barbara, Santa Barbara, CA, United States
 
B44A-0370
Picoplankton contribution to biogenic silica stocks and production rates in the Sargasso Sea (88425)
Jeffrey W Krause1, Mark A Brzezinski2, Stephen B Baines3, Jackie Collier4, Daniel Ohnemus5 and Benjamin S Twining5, (1)Dauphin Island Sea Lab, Dauphin Island, AL, United States, (2)University of California Santa Barbara, Santa Barbara, CA, United States, (3)Stony Brook University, Stony Brook, NY, United States, (4)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States, (5)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States
 
B44A-0371
Benthic Diatoms: What Makes Them Unique (88588)
Aude Leynaert1, Coline Fardel2, Beatriz Beker2, Charlotte Soler3, Gaspard Delebecq3, Philippe Pondaven4, Pierre Emmanuel Durand5 and Kevin Heggarty6, (1)CNRS, LEMAR IUEM, Plouzané, France, (2)IUEM, France, (3)IUEM Institut Universitaire Européen de la Mer, LEMAR, Plouzané, France, (4)UBO, France, (5)LBCM, Université de Bretagne Sud, Lorient, France, (6)Telecom Bretagne, Optic, Plouzane, France
 
B44A-0372
Silicon isotope fractionation by marine siliceous sponges (90135)
Katharine R Hendry, University of Bristol, Bristol, United Kingdom and Manuel Maldonado, Centro de Estudios Avanzados de Blanes, Department of Marine Ecology, Blanes, Spain
 
B44A-0373
Accumulation and speciation of Si by Synechococcus examined by single-cell synchrotron x-ray fluorescence and bulk x-ray spectroscopy (92473)
Daniel Ohnemus1, Jeffrey W Krause2, Mark A Brzezinski3, Stephen B Baines4, Jackie Collier5 and Benjamin S Twining1, (1)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States, (2)Dauphin Island Sea Lab, Dauphin Island, AL, United States, (3)University of California Santa Barbara, Santa Barbara, CA, United States, (4)Stony Brook University, Department of Ecology and Evolution, Stony Brook, NY, United States, (5)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States
 
B44A-0374
The Role of Diatom Frustule Morphology in the Formation of Reverse Weathering Products (93022)
Rebecca A Pickering1,2 and Jeffrey W Krause1,2, (1)Dauphin Island Sea Lab, Dauphin Island, AL, United States, (2)University of South Alabama, Marine Sciences, Mobile, AL, United States
 
B44A-0375
Variation of Diatoms in the Sinking Particles and the Paleoceanographic Implication in the northern South China Sea: One-year Sediment Trap Mooring Observation (93411)
Lihua Ran1, Jianfang Chen1, Martin Georg Wiesner2, Zheng Ling1, Niko Lahajnar2, Zhi Yang1, Hongliang Li1, Qiang Hao1 and Kui Wang1, (1)Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China, (2)University of Hamburg, Hamburg, Germany
 
B44A-0376
Illuminating the Relative Contribution of Different Diatom Genera to Whole-Assemblage Silica Production in the Surface Ocean (90629)
Diana E Varela1, Jennifer Joan Long2, Karina E Giesbrecht3 and Kerry R Delaney2, (1)University of Victoria, Department of Biology & School of Earth and Ocean Sciences, Victoria, BC, Canada, (2)University of Victoria, Department of Biology, Victoria, BC, Canada, (3)University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
 
B44A-0377
The Silicon Stable Isotope Distribution Along the GEOVIDE Section of the North Atlantic Ocean (87406)
Jill N Sutton, IUEM/UBO, Technopôle Brest-Iroise, Place Nicolas Copernic, Plouzané, France, Gregory F. de Souza, ETH Zurich, Institute of Geochemistry and Petrology, Zurich, Switzerland and Christina L de La Rocha, Currently unaffiliated
 
B44A-0378
The Contribution of Siliceous Sponges to the Export of Biogenic Silica to Marine Sediments (91091)
Manuel Maldonado, María López-Acosta, Cèlia Sitjà and Marta García, Center for Advanced Studies of Blanes (CEAB, CSIC), Department of Marine Ecology, Blanes, Spain
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