Molecular paleohydrology: Interpreting the hydrogen-isotopic composition of lipid biomarkers from photosynthesizing organisms

Dirk Sachse, Isabelle Billault, Gabriel J. Bowen, Yoshito Chikaraishi, Todd E. Dawson, Sarah J. Feakins, Katherine H. Freeman, Clayton R. Magill, Francesca A. McInerney, Marcel T.J. Van Der Meer, Pratigya Polissar, Richard J. Robins, Julian P. Sachs, Hanns Ludwig Schmidt, Alex L. Sessions, James W.C. White, Jason B. West, Ansgar Kahmen

Research output: Contribution to journalArticlepeer-review

518 Scopus citations

Abstract

Hydrogen-isotopic abundances of lipid biomarkers are emerging as important proxies in the study of ancient environments and ecosystems. A decade ago, pioneering studies made use of new analytical methods and demonstrated that the hydrogen-isotopic composition of individual lipids from aquatic and terrestrial organisms can be related to the composition of their growth (i.e., environmental) water. Subsequently, compound-specific deuteriumhydrogen (DH) ratios of sedimentary biomarkers have been increasingly used as paleohydrological proxies over a range of geological timescales. Isotopic fractionation observed between hydrogen in environmental water and hydrogen in lipids, however, is sensitive to biochemical, physiological, and environmental influences on the composition of hydrogen available for biosynthesis in cells. Here we review the factors and processes that are known to influence the hydrogen-isotopic compositions of lipid-sespecially n-alkanes-from photosynthesizing organisms, and we provide a framework for interpreting their DH ratios from ancient sediments and identify future research opportunities.

Original languageEnglish (US)
Pages (from-to)221-249
Number of pages29
JournalAnnual Review of Earth and Planetary Sciences
Volume40
DOIs
StatePublished - May 2012

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Molecular paleohydrology: Interpreting the hydrogen-isotopic composition of lipid biomarkers from photosynthesizing organisms'. Together they form a unique fingerprint.

Cite this