Sources and degradability of organic matter revealed by 14C analysis

Thus sub-project will focus on i) the identification and characterization of the old organic matter pools, and ii) the evaluation of the degradability of organic matter in subsoils. The following three hypotheses will be tested, which all have the objective to obtain quantitative and qualitative information on organic matter sources and their degradability:
I) Old, refractory organic carbon sources constitute a large fraction of soil organic carbon particularly in subsoil horizons.
II) The old organic carbon pool is variable in composition and age in subsoils derived from different parent material. The parent material may be on the one hand a source of geogenic carbon and on the other hand its mineralogy may affect transformation and stabilization processes.
III) Easily degradable substrates are preferentially metabolized but with increasing soil depth older substrates are increasingly respired/utilized by soil microorganisms.

Project leader

Prof. Dr. Janet Rethemeyer
University of Cologne
Institute for Geology & Mineralogy

Zülpicher Str. 49a
50674 Cologne

 

Contact:
Phone: +49 (0) 221 470-7317
Mail to: janet.rethemeyer(at)uni-koeln.de

Ph.D. student

M.Sc. Anja Wotte
University of Cologne
Institute for Geology & Mineralogy

Zülpicher Str. 49a
50674 Cologne

 

Contact:
Phone: +49 (0) 221 470-7318
Maill to: anja.wotte(at)uni-koeln.de

M.Sc. Jan Melchert
University of Cologne
Institute for Geology & Mineralogy

Zülpicher Str. 49a
50674 Cologne

 

 

Contact:
Phone: +49 (0) 221 470-6195
Maill to: jan.melchert(at)uni-koeln.de

Student assistant

Ms. Michaela Grupp
University of Cologne
Institute for Geology & Mineralogy

Zülpicher Str. 49a
50674 Cologne

 

 

Contact:
Phone: N/A
Maill to: N/A