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The synergetic effect of moisture protection, substrate quality and biotic acclimation on soil organic carbon persistence along a cultivated loamy hillslope
Wiaux, François; Vanclooster, Marnik; Cornelis, Jean-Thomas et al.
2013EGU 2014 European Geosciences Union
 

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Keywords :
CO2 fluxes; Organic Carbon persistence; GLS reression model
Abstract :
[en] Abstract : 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.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Wiaux, François
Vanclooster, Marnik
Cornelis, Jean-Thomas ;  Université de Liège - ULiège > BIOSE > Échanges Eau-Sol-Plante
Van Oost, Kristof
Language :
English
Title :
The synergetic effect of moisture protection, substrate quality and biotic acclimation on soil organic carbon persistence along a cultivated loamy hillslope
Publication date :
2013
Event name :
EGU 2014 European Geosciences Union
Event place :
Vienne, Austria
Event date :
du 27/04/2014 au 02/05/2014
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since 23 January 2015

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