Author/Authors :
Vicca، نويسنده , , Sara and Fivez، نويسنده , , Lise and Kockelbergh، نويسنده , , Fred and Van Pelt، نويسنده , , Dimitri and Segers، نويسنده , , Jan J.R. and Meire، نويسنده , , Patrick and Ceulemans، نويسنده , , Reinhart and Janssens، نويسنده , , Ivan A.، نويسنده ,
Abstract :
In a mesocosm experiment, with bare peat soils exposed to different water levels (WL), we examined whether heterotrophic respiration (Rh) acclimated to a 3 °C temperature increase. Across all WLs, Rh at 15 °C was never lower in the heated treatment than in the unheated treatment, indicating that Rh did not acclimate to the warmer conditions. We hypothesize that this lack of thermal acclimation is due to the unlimited substrate availability in these organic soils. These results imply that peat soils may exhibit a sustained positive feedback to global warming.
Keywords :
heterotrophic respiration , Warming , Thermal acclimation , Substrate depletion , peat soil
