Carbon sequestration in British Columbian sub-boreal cut blocks

Abstract

the below ground C0 2 flux and above ground biomass was measured in 7 cut blocks aged 0, 2, 3, 5, 6, 9 and 10 years and one mature stand. All sites were in the SBS wkl 08or 07 except the 0 and 9 year-old sites that were of the sub series 01. The growing season below ground C0 2 flux was similar for all cut blocks, including the mature forest.Furthermore, there was little change in above ground biomass carbon uptake between the different aged cut blocks. Hence, when biomass was incorporated with the below ground C0 2 fluxes all cut blocks were sources for C0 2 • Therefore, cut blocks within theAleza Lake region (SBS wk1 07 or 08) are sources of C0 2 for at least 10 years after harvest because the conifer component of the C0 2 flux is incapable of surmounting the loss of C0 2 from below ground.ll