reference : An inventory‐based analysis of Canada's managed forest carbon dynamics, 1990 to 2008

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Bibliographic fields
reftype Journal Article
Abstract Abstract Canada's forests play an important role in the global carbon (C) cycle because of their large and dynamic C stocks. Detailed monitoring of C exchange between forests and the atmosphere and improved understanding of the processes that affect the net ecosystem exchange of C are needed to improve our understanding of the terrestrial C budget. We estimated the C budget of Canada's 2.3 × 106km2 managed forests from 1990 to 2008 using an empirical modelling approach driven by detailed forestry datasets. We estimated that average net primary production (NPP) during this period was 809 ± 5TgCyr−1 (352gCm−2yr−1) and net ecosystem production (NEP) was 71 ± 9TgCyr−1 (31gCm−2yr−1). Harvesting transferred 45 ± 4TgCyr−1 out of the ecosystem and 45 ± 4TgCyr−1 within the ecosystem (from living biomass to dead organic matter pools). Fires released 23 ± 16TgCyr−1 directly to the atmosphere, and fires, insects and other natural disturbances transferred 52 ± 41TgCyr−1 from biomass to dead organic matter pools, from where C will gradually be released through decomposition. Net biome production (NBP) was only 2 ± 20TgCyr−1 (1gCm−2yr−1); the low C sequestration ratio (NBP/NPP=0.3%) is attributed to the high average age of Canada's managed forests and the impact of natural disturbances. Although net losses of ecosystem C occurred during several years due to large fires and widespread bark beetle outbreak, Canada's managed forests were a sink for atmospheric CO2 in all years, with an uptake of 50 ± 18TgCyr−1 [net ecosystem exchange (NEE) of CO2=−22gCm−2yr−1].
Author Stinson, G.; Kurz, W. A.; Smyth, C. E.; Neilson, E. T.; Dymond, C. C.; Metsaranta, J. M.; Boisvenue, C.; Rampley, G. J.; Li, Q.; White, T. M.; Blain, D.
DOI 10.1111/j.1365-2486.2010.02369.x
Issue 6
Journal Global Change Biology
Pages 2227-2244
Title An inventory‐based analysis of Canada's managed forest carbon dynamics, 1990 to 2008
Volume 17
Year 2011
Bibliographic identifiers
_record_number 273
_uuid f0ccebbf-4b1c-4c47-a796-4b08fbfb615b