Wiaux, François
[UCL]
Vanclooster, Marnik
[UCL]
Cornélis, Jean-Thomas
[UCL]
Van Oost, Kristof
[UCL]
The combination of hydrologic, geomorphic and biogeochemical approaches is required to determine organic carbon (OC) persistence and dynamics within landscapes. Here, we used soil in-situ surface heterotrophic respiration measurement as an indicator of OC persistence along a hillslope (crop field on the loess belt Under temperate climate), characterized by an important erosion-induced OC stock colluvium downslope. Along this topographical gradient, we quantified the space-time structure of soil water and temperature, and soil OC amount and quality (from a chemical point of view based on NaOCl oxidation) in relation to CO2 fluxes. We used a Generalized Least Square (GLS) regression model to identify the role of each abiotic factor as well as their interactions on observed soil respiration rates, and to calculate time-average values of these CO2 fluxes at each studied slope positions.
Bibliographic reference |
Wiaux, François ; Vanclooster, Marnik ; Cornélis, Jean-Thomas ; Van Oost, Kristof. The synergetic effect of moisture protection, substrate quality and biotic acclimation on soil organic carbon persistence along a cultivated loamy hillslope.EGU General Assembly (Vienna, Austria, du 28/04/2014 au 02/05/2014). In: Geophysical Research Abstracts, vol.16, 2014, p. EGU2014-13456 |
Permanent URL |
http://hdl.handle.net/2078.1/145843 |