Articles | Volume 19, issue 17
https://doi.org/10.5194/bg-19-4107-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-4107-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 Sep 2022
Research article |
| 05 Sep 2022
| 05 Sep 2022
Carbon isotopic ratios of modern C3 and C4 vegetation on the Indian peninsula and changes along the plant–soil–river continuum – implications for vegetation reconstructions
Frédérique M. S. A. Kirkels
CORRESPONDING AUTHOR
Department of Earth Sciences, Faculty of Geosciences, Utrecht
University, Princetonlaan 8a, 3584 CB Utrecht, the Netherlands
Hugo J. de Boer
Copernicus Institute of
Sustainable Development, Faculty of Geosciences, Utrecht University,
Princetonlaan 8a, 3584 CB Utrecht, the Netherlands
Paulina Concha Hernández
Department of Earth Sciences, Faculty of Geosciences, Utrecht
University, Princetonlaan 8a, 3584 CB Utrecht, the Netherlands
Chris R. T. Martes
Department of Earth Sciences, Faculty of Geosciences, Utrecht
University, Princetonlaan 8a, 3584 CB Utrecht, the Netherlands
Marcel T. J. van der Meer
Department of Marine Microbiology and Biogeochemistry, NIOZ Royal
Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Den Burg, the
Netherlands
Sayak Basu
Department of Earth Sciences, Indian Institute of Science Education
and Research Kolkata, Mohanpur 741246, India
present address: Geological Oceanography Department, National
Institute of Oceanography, Dona Paula, Goa 403004, India
Muhammed O. Usman
Geological Institute, ETH Zurich, Sonneggstrasse 5, 8092
Zurich, Switzerland
present address: Department of Physical & Environmental Sciences,
University of Toronto Scarborough, Toronto, Ontario M1C1A4, Canada
Department of Earth Sciences, Faculty of Geosciences, Utrecht
University, Princetonlaan 8a, 3584 CB Utrecht, the Netherlands
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Short summary
The distinct carbon isotopic values of C3 and C4 plants are widely used to reconstruct past hydroclimate, where more C3 plants reflect wetter and C4 plants drier conditions. Here we examine the impact of regional hydroclimatic conditions on plant isotopic values in the Godavari River basin, India. We find that it is crucial to identify regional plant isotopic values and consider drought stress, which introduces a bias in C3 / C4 plant estimates and associated hydroclimate reconstructions.
The distinct carbon isotopic values of C3 and C4 plants are widely used to reconstruct past...
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