Forest savanna ecotone dynamics in India as revealed by carbon isotope ratios of soil organic matter

  title={Forest savanna ecotone dynamics in India as revealed by carbon isotope ratios of soil organic matter},
  author={Andr{\'e} Mariotti and E. Peterschmitt},
In India, the stability of the forest savanna boundary (ecotone) has been questioned. To investigate the possibility of vegetation change at this boundary, we used the natural difference in the stable carbon isotope ratio (13C/12C, expressed as δ13C) of C3 (forest) and C4 (savanna) plants, which is preserved in the isotopic composition of soil organic carbon. Past changes in the position of the ecotone can thus be documented by 13C/12C analysis of soil organic matter (SOM). Measurements were… CONTINUE READING
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