On Geologic Timescales, Plant Carbon Isotope Fractionation Responds to Precipitation Similarly to Modern Plants and Has a Small Negative Correlation with Pco2
Available online at www.sciencedirect.com ScienceDirect Geochimica et Cosmochimica Acta 270 (2020) 264–281 www.elsevier.com/locate/gca On geologic timescales, plant carbon isotope fractionation responds to precipitation similarly to modern plants and has a small negative correlation with pCO2 Kristen Schlanser a,⇑, Aaron F. Diefendorf a, David R. Greenwood b Kevin E. Mueller c, Christopher K. West d, Alexander J. Lowe b,e, James F. Basinger d Ellen D. Currano f, Andrew G. Flynn g, Henry C. Fricke h, Jie Geng g Herbert W. Meyer i, Daniel J. Peppe g a Department of Geology, University of Cincinnati, Cincinnati, OH 45221, USA b Department of Biology, Brandon University, 270 18th Street, Brandon, MB R7A 6A9, Canada c Biological, Geological and Environmental Sciences, Cleveland State University, 2121 Euclid Ave, Cleveland, OH 44115, USA d Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada e Department of Biology, University of Washington, 24 Kincaid Hall, Seattle, WA 98195, USA f Departments of Botany and Geology & Geophysics, University of Wyoming, 1000 E. University Ave, Laramie, WY 82071, USA g Terrestrial Paleoclimatology Research Group, Department of Geosciences, Baylor University, 101 Bagby Ave, TX 76706, USA h Geology Department, Colorado College, 14 E. Cache La Poudre, Colorado Springs, CO 80903, USA i National Park Service, Florissant Fossil Beds National Monument, Florissant, P.O. Box 185, CO 80816, USA Received 9 June 2019; accepted in revised form 19 November 2019; Available online 27 November 2019 Abstract Leaf carbon isotope fractionation (Dleaf) is sensitive to environmental conditions and can provide insights into the state and evolution of leaf gas-exchange in response to climate and environment factors.
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