%0 Research article
%T Carbon stocks in managed conifer forests in northern Ontario, Canada
%A Hunt, Shelley L.
%A Gordon, Andrew M.
%A Morris, Dave M.
%D 2010
%J Silva Fennica
%V 44
%N 4
%R doi:10.14214/sf.128
%U https://silvafennica.fi/article/128
%X Carbon pools and net primary productivity (aboveground) were measured in  managed stands of jack pine (Pinus banksiana Lamb.) and black spruce  (Picea mariana [Mill.] B.S.P.), ranging in age from 10 to 53 years, in  the Lake Nipigon area of northern Ontario. Organic carbon in the forest  floor and surface mineral soil (top 15 cm) ranged from 13 to 46 Mg C ha<sup>-1</sup> and 10 to 29 Mg C ha<sup>-1</sup>, respectively. Carbon in aboveground tree biomass ranged from 11 to 74 Mg C ha<sup>-1</sup> in crop trees, and 0 to 11 Mg C ha<sup>-1</sup> in non-crop trees. Coarse woody debris (downed woody debris and snags) contained between 1 and 17 Mg C ha<sup>-1</sup>.  Understory vegetation rarely represented more than 1% of total  ecosystem carbon accumulation, but was responsible for a larger  proportion of aboveground net primary productivity (ANPP). Rates of ANPP  (expressed as carbon) ranged from 0.8 to 3.5 Mg C ha<sup>-1</sup> y<sup>-1</sup>.  Carbon stocks in managed stands were compared with published values  from similarly aged fire-origin stands in the North American boreal  region. Carbon stocks in our study stands generally exceeded those in  unmanaged fire-origin stands of the same age, due to larger tree and  forest floor carbon pools.