Carbon isotopes in soils and palaeosols as ecology and palaeoecology indicators

T. E. Cerling, Jay Quade, Y. Wang, J. R. Bowman

Research output: Contribution to journalArticle

408 Citations (Scopus)

Abstract

There are few quantitative techniques in use today for palaeoecological reconstruction in terrestrial depositional systems. One approach to such reconstructions is to estimate the proportion of C3 to C4 plants once present at a site using carbon isotopes from palaeosol carbonates1-3. Until now, this has been hampered by an inadequate understanding of the relationship between the carbon isotopic composition of modern soil carbonate and coexisting organic matter. Here we have found that the two systematically differ by 14-16% in undisturbed modern soils. This difference is compatible with isotopic equilibrium between gaseous CO2, and aqueous and solid carbonate species in a soil system controlled by diffusive mass transfer of soil CO2 derived from irreversible oxidation of soil organic matter. Organic matter and pedogenic carbonate from palaeosols of Pleistocene to late Miocene age in Pakistan also differ by 14-16%,. This indicates that diagenesis has not altered the original isotopic composition of either phase, thus confirming their use in palaeoecological reconstruction.

Original languageEnglish (US)
Pages (from-to)138-139
Number of pages2
JournalNature
Volume341
Issue number6238
StatePublished - 1989
Externally publishedYes

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paleoecology
paleosol
carbon isotope
ecology
carbonate
isotopic composition
soil
organic matter
C4 plant
diagenesis
soil organic matter
mass transfer
Miocene
Pleistocene
oxidation
indicator
carbon

ASJC Scopus subject areas

  • General

Cite this

Cerling, T. E., Quade, J., Wang, Y., & Bowman, J. R. (1989). Carbon isotopes in soils and palaeosols as ecology and palaeoecology indicators. Nature, 341(6238), 138-139.

Carbon isotopes in soils and palaeosols as ecology and palaeoecology indicators. / Cerling, T. E.; Quade, Jay; Wang, Y.; Bowman, J. R.

In: Nature, Vol. 341, No. 6238, 1989, p. 138-139.

Research output: Contribution to journalArticle

Cerling, TE, Quade, J, Wang, Y & Bowman, JR 1989, 'Carbon isotopes in soils and palaeosols as ecology and palaeoecology indicators', Nature, vol. 341, no. 6238, pp. 138-139.
Cerling, T. E. ; Quade, Jay ; Wang, Y. ; Bowman, J. R. / Carbon isotopes in soils and palaeosols as ecology and palaeoecology indicators. In: Nature. 1989 ; Vol. 341, No. 6238. pp. 138-139.
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