CARBSTOR - A method to evaluate and to quantify the C-storage and the C-release potential of peatland soils


The aim of the proposed project is the development of the procedure CARBSTOR, which intends to determine the C-storage and the C-release potential of different peatland soils using easily available geodata and algorithms. By investigating the C-storage and the C-release potentials of different peatland soils this way, they can be evaluated and ranked. With CARBSTOR, the management for peatlands based on C-vulnerability and C-storage can be improved significantly. Activities to ensure the C-storage ability of mires can better be justified. Thus, the acceptance of these measures would increase and scarce resources can be used more efficiently. Based on previous research results by the applicant, regarding the characteristics of mire profiles and the kind of hydrogenetic mire type (HGMT), a detailed determination of the C-storage capacity of peatland soils becomes possible. Depending on peatland embedding in the landscape, water supplies and anthropogenic diversification, the most significant mire types (percolation mires, water rise mires, terrestrialisation mires, raised bogs) vary in their C-storage potential by a factor of 10. Therefore, a method for site-specific identification of HGMTs is developed first, which is based on comprehensive and nationwide available geodata and which avoids expensive and time-consuming field mapping and local analysis. Scientific knowledge will be mapped and evaluated with available geodata, so that a dominant HGMT can be allocated on principle to the peatland soils of a certain region. The C-release potential also depends on the quality of the peat typical of a certain HGMT. This potential for the specific peat types can be determined measuring hot-water-extractable C - a fraction that is very easily decomposable and responds immediately to modifications of land use. This measurement is performed by a certified VDLUFA method. By combination of the results of individual types of peat with the HGMT, calculation of C-storage and C-release potential for different soils in peatlands becomes possible.


Principal investigators
Zeitz, Jutta Prof. Dr. agr. (Details) (Soils and Environmental Science)

Financer
Deutsche Bundesstiftung Umwelt

Duration of project
Start date: 09/2009
End date: 06/2012

Last updated on 2022-08-09 at 09:08