GC23I:
C4 Photosynthesis in the Earth System I

Tuesday, 16 December 2014: 1:40 PM-3:40 PM
Chairs:  Stephanie Pau, Florida State University, Tallahassee, FL, United States, David L. Fox, University of Minnesota Twin Cities, Minneapolis, MN, United States, Christopher J Still, Oregon State University, Corvallis, OR, United States and Caroline A E Strömberg, University of Washington Seattle Campus, Department of Biology and Burke Museum, Seattle, WA, United States
Primary Conveners:  Stephanie Pau, Florida State University, Tallahassee, FL, United States
Co-conveners:  Christopher J Still, Oregon State University, Corvallis, OR, United States, David L. Fox, University of Minnesota, Earth Sciences, Minneapolis, MN, United States and Caroline Strömberg, University of Washington, Biology & Burke Museum of Natural History & Culture, Seattle, United States
OSPA Liaisons:  Stephanie Pau, Florida State University, Tallahassee, FL, United States

Abstracts Submitted to this Session:

1:40 PM
GC23I-01
 
The Paleo-ecology of C4 Evolution
Rowan F Sage and Roxana Khoshravesh, University of Toronto, Ecology and Evolutionary Biology, Toronto, ON, Canada
1:55 PM
GC23I-02
 
Divergent evolutionary histories of C4 grasses shape global grassland ecology
Caroline Lehmann, University of Edinburgh, Edinburgh, United Kingdom, Daniel Griffith, Wake Forest University, Biology, Winston-Salem, NC, United States and Colin Osborne, University of Sheffield, Sheffield, United Kingdom
2:10 PM
GC23I-03
 
Why Are C3-C4 Intermediate Species Rare?
Jennifer E Johnson1, Christopher B Field2 and Joseph A Berry2, (1)University of Arizona, Tucson, AZ, United States, (2)Carnegie Inst Washington, Washington, DC, United States
2:25 PM
GC23I-04
 
Leaf oxygen and Carbon Isotopic Signatures Reflect Drought Resistance and Water Use Efficiency in the C4 Grass, Setaria viridis
Patrick Ellsworth, Patricia Ellsworth and Asaph B Cousins, Washington State University, Pullman, WA, United States
2:40 PM
GC23I-05
 
Ecological Change in the Turkana Basin Over the Past 4 Ma
Thure E Cerling, University of Utah, Salt Lake City, UT, United States
2:55 PM
GC23I-06
 
Did Hydrological Change Drive the Expansion of C4 Grasslands in the Siwaliks during the Late Miocene?
Jennifer Lee Pensky, Barnard College, New York, NY, United States, Samuel R Phelps, Columbia University of New York, Palisades, NY, United States, Kevin T Uno, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Pratigya J Polissar, Lamont-Doherty Earth Observato, Nyack, NY, United States
3:10 PM
GC23I-07
 
Spatiotemporal Variation in the Environmental Controls of C4-Grass Origin and Ecology: Insights from Grass-Pollen δ13C Data
David M Nelson1, Michael Urban2 and Fengsheng Hu2,3, (1)Appalachian Laboratory, University of Maryland Center for Environmental Science, Frostburg, MD, United States, (2)University of Illinois at Urbana Champaign, Program in Ecology, Evolution and Conservation Biology, Urbana, IL, United States, (3)University of Illinois at Urbana Champaign, Plant Biology, Geology, Urbana, IL, United States
3:25 PM
GC23I-08
 
The spatial distribution of C3 and C4 grasses in North America through the next century
Jennifer M Cotton1, Thomas M. Mosier2, Thure E Cerling1, James R Ehleringer1, Kathryn A Hoppe3 and Christopher J Still2, (1)University of Utah, Salt Lake City, UT, United States, (2)Oregon State University, Corvallis, OR, United States, (3)Green River Community College, Auburn, WA, United States
 
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