B51A:
Biogeochemical Cycling of Silicon and Isotopes in Biogenic Silica I Posters

Friday, 19 December 2014: 8:00 AM-12:20 PM
Chairs:  Claudia Ehlert, Max Planck Institute for Marine Microbiology, Bremen, Germany and George E A Swann, University of Nottingham, Nottingham, NG7, United Kingdom
Primary Conveners:  Claudia Ehlert, Max Planck Institute for Marine Microbiology, Bremen, Germany
Co-conveners:  Patricia Grasse, GEOMAR, Kiel, Germany, Anson W Mackay, University College London, London, United Kingdom and George E A Swann, University of Nottingham, Nottingham, NG7, United Kingdom
OSPA Liaisons:  Patricia Grasse, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany

Abstracts Submitted to this Session:

0001
 
Significant Biogenic Silica Retention from Reverse Weathering in Non-deltaic Sediments
Jeffrey W Krause1,2, Ashley M Larson1, Elizabeth S Darrow1,2 and Ruth H Carmichael1,2, (1)Dauphin Island Sea Lab, Dauphin Island, AL, United States, (2)University of South Alabama, Department of Marine Sciences, Mobile, AL, United States
0002
 
Transformation of Silicon in a Coastal Sandy Beach Ecosystem: Insights from Stable Silicon Isotopes in Ground- and Porewaters
Claudia Ehlert1, Ronja Paffrath1, Anja Reckhardt2 and Katharina Pahnke1,2, (1)Max Planck Institute for Marine Microbiology, Bremen, Germany, (2)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment, Oldenburg, Germany
0003
 
Factors controlling the silicon isotope composition of dissolved silicate and biogenic silica in the Peruvian Upwelling
Patricia Grasse1, Kristin Haynert2, Mark A Brzezinski3 and Martin Frank1, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)University of Goettingen, J.F. Blumenbach Institute of Zoology and Anthropology, Goettingen, Germany, (3)University of California Santa Barbara, Santa Barbara, CA, United States
0004
 
Dissolved Silicon Isotopic Compositions in the East China Sea: Water Mass Mixing Versus Biological Fractionation
Zhimian Cao, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Martin Frank, GEOMAR, Kiel, Germany and Minhan Dai, Xiamen University, Xiamen, China
0005
 
Silicon Isotopes in Surface Waters during Summer in the Southern Ocean
Lucie Cassarino1 and Christina L De La Rocha1,2, (1)IUEM Institut Universitaire Européen de la Mer, Plouzané, France, (2)University of Brest, IUEM, Brest, France
0006
 
A Paleogene Silicon Stable Isotope Record: Long-Term Carbon and Silicon Cycling Interaction Revealed By Sponges and Radiolarians
Guillaume Fontorbe1, Christina L De La Rocha2, Katharine R Hendry3, Patrick Frings1 and Daniel J Conley1, (1)Lund University, Lund, Sweden, (2)IUEM Institut Universitaire Européen de la Mer, Plouzané, France, (3)University of Bristol, Earth Sciences, Bristol, United Kingdom
0007
 
Oxygen Isotope Analyses From Guaymas Basin Sediment Trap Diatoms
Anthony J Menicucci1, Howard J Spero1 and Robert Thunell2, (1)University of California Davis, Davis, CA, United States, (2)Univ South Carolina, Columbia, SC, United States
0008
 
Rapid changes in diatom silica surface charge density, silanol abundance, and oxygen isotope values elucidate silica maturation processes in biogenic silica
Wilson Wiedenheft1, Justin P Dodd1 and Lee Sunderlin2, (1)Northern Illinois University, Geology and Environmental Geosciences, DeKalb, IL, United States, (2)Northern Illinois University, Chemistry and Biochemistry, DeKalb, IL, United States
0009
 
Ecosystemic Postglacial Succession of Nettilling Lake (Baffin Island, Canada) Inferred by Oxygen Isotope Composition of Lacustrine Diatoms
Biljana Narancic1, Bernhard Chapligin2, Hanno Meyer2 and Reinhard Pienitz1, (1)Laval University, Quebec City, QC, Canada, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Potsdam, Potsdam, Germany
0010
 
Changes in the δ18O and δ30Si values of partially dissolved phytoliths: implications for environmental reconstruction
Andrea Jane Prentice, Iffat Jabeen and Elizabeth A Webb, University of Western Ontario, London, ON, Canada
0011
 
The next chapter of direct phytolith 14C dating: debunking the myth of occluded photosynthetic carbon exclusivity
Guaciara Santos1, Araks Harutyunyan1, Anne E Alexandre2, Paul E Reyerson1,3, Kimberley L. Gallagher1 and Isabelle Basile-Doelsch2, (1)University of California Irvine, Irvine, CA, United States, (2)CEREGE, CNRS-Aix-Marseille Université, Aix en Provence, France, (3)University of Wisconsin La Crosse, La Crosse, WI, United States
0012
 
Characterizing the Nature and Distribution of Phytolith Organic Matter Using Raman Spectroscopy
Kimberley L. Gallagher1, Alba Alfonso-Garcia1, Jessica Sanchez2, Araks Harutyunyan1, Guaciara Santos1 and Eric Potma1, (1)University of California Irvine, Irvine, CA, United States, (2)California State University Fullerton, Fullerton, CA, United States
 
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