B33A:
Alternative Earths: The Co-evolution of Life and its Environments from the GOE to the Rise of Complex Life I Posters

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Session ID#: 13572

Session Description:
Geochemical data suggest a complex relationship between biological innovation and the evolution of Earth’s surface environments throughout the Proterozoic—beginning with climatic and geochemical perturbation in the wake of the Paleoproterozoic Great Oxidation Event and culminating with oxygenation, low-latitude glaciation, and the rise of animals in the Neoproterozoic. Even more intriguing is the maintenance of geochemical and climatic stasis during the intervening ‘boring billion’ of the Mesoproterozoic. Our session will explore this critical chapter of Earth’s evolution. We welcome submissions that provide novel constraints on the redox landscape of the Proterozoic ocean-atmosphere system, characterize biospheric oxygenation dynamics on a variety of spatial and temporal scales, and synthesize the spatiotemporal patterns of biological innovation during Proterozoic time. Also relevant are numerical models that explore the role of the marine biosphere in modulating Proterozoic climate, Earth system forcings involved in climatic collapse, and feedback mechanisms responsible for persistent habitability on Earth.
Primary Convener:  Stephanie L Olson, University of California Riverside, Riverside, CA, United States
Conveners:  Charles Diamond, University of California Riverside, Riverside, CA, United States and Timothy Lyons, University of California Riverside, Riverside, CA, United States
Chairs:  Charles Diamond, Stephanie L Olson and Timothy Lyons, University of California Riverside, Riverside, CA, United States
OSPA Liaison:  Stephanie L Olson, University of California Riverside, Riverside, CA, United States
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0426 Biosphere/atmosphere interactions [BIOGEOSCIENCES]
0489 Trace element cycling [BIOGEOSCIENCES]
5225 Early environment of Earth [PLANETARY SCIENCES: ASTROBIOLOGY]

Abstracts Submitted to this Session:

The Role of Microbial Iron Reduction in the Formation of Proterozoic Molar Tooth Structures (118633)
Malcolm S.W. Hodgskiss1,2, Marcus Kunzmann2,3, Galen P Halverson4 and Andre Poirier5, (1)Stanford University, Geological Sciences, Stanford, CA, United States, (2)McGill University, Earth and Planetary Sciences/GEOTOP, Montreal, QC, Canada, (3)CSIRO Mineral Resources, Australian Resources Research Centre, Kensington, Australia, (4)McGill University, Earth and Planetary Sciences, Montreal, QC, Canada, (5)University of Quebec at Montreal UQAM, Montreal, QC, Canada
Temporal variations in the gene expression levels of cyanobacterial anti-oxidant enzymes through geological history: implications for biological evolution during the Great Oxidation Event (133008)
Mariko Harada1, Ryutaro Furukawa1, Shin-ichi Yokobori1, Eiichi Tajika2 and Akihiko Yamagishi1, (1)Tokyo Univ Pharmacy & Life Sci, Tokyo, Japan, (2)The University of Tokyo, Tokyo, Japan
Microbial Innovation after the GOE (177135)
Cara Magnabosco, Simons Foundation, New York, NY, United States, Kelsey Reed Moore, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Joanna M. Wolfe, Massachusetts Institute of Technology, Cambridge, MA, United States and Gregory P. Fournier, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Cambridge, United States
Digital Reconstructions of Cloudina Populations: An In-Depth, Three-Dimensional Study (184478)
Akshay Mehra, Princeton University, Department of Geosciences, Princeton, NJ, United States
Comparison of whole rock and discrete pyrite geochemistry as complementary tracers of ancient ocean chemistry: An example from the Neoproterozoic Doushantou Formation, China (189120)
Daniel David Gregory1, Timothy W Lyons2, Charles Diamond3, Ross Raymond Large4, Ganqing Jiang5, Paul H Olin6 and Aleksandr S Stepanov4, (1)University of Tasmania, Hobart, TAS, Australia, (2)University of California Riverside, Department of Earth and Planetary Sciences, Riverside, United States, (3)University of California Riverside, Riverside, CA, United States, (4)University of Tasmania, Hobart, Australia, (5)University of Nevada Las Vegas, Department of Geoscience, Las Vegas, NV, United States, (6)University of Tasmania, Centre of Ore Deposit and Earth Sciences, Hobart, TAS, Australia
Automating Microbial Directed Evolution For Bioengineering Applications (198590)
Alonzo Lee1, Isabella Siham Demachkie2, Nina Sardesh2, Dillon Arismendi3, Cynthia Ouandji4, Jonathan Wang4, Justin Blaich5 and Diana Gentry6, (1)NASA Ames Research Center, Moffett Field, CA, United States, (2)University of California Santa Cruz, Santa Cruz, CA, United States, (3)City College of San Francisco, San Francisco, CA, United States, (4)San Jose State University, San Jose, CA, United States, (5)Bay Area Environmental Research / NASA Ames Research Center, Moffett Field, CA, United States, (6)NASA Ames Research Center, Biospheric Science Branch, Moffett Field, CA, United States
Unraveling the redox evolution of the Yangtze Block across the Precambrian/Cambrian transition (199121)
Charles W Diamond1, Feifei Zhang2, Yan Chen1 and Timothy W Lyons3, (1)University of California Riverside, Riverside, CA, United States, (2)Nanjing University, Nanjing, China, (3)University of California Riverside, Department of Earth and Planetary Sciences, Riverside, United States
Banded Iron Formations of the Cauê Formation, Quadrilátero Ferrífero Minas Gerais, Brazil: A novel pre-GOE record of biospheric evolution (199722)
Bridget K Lee, University of California Riverside, Riverside, CA, United States, Harilaos Tsikos, Rhodes University, Grahamstown, South Africa, Elson P Oliveira, University of Campinas, Campinas, SP, Brazil and Timothy Lyons, University of California Riverside, Department of Earth Sciences, Riverside, CA, United States

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