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- W2134993887 abstract "Abstract We calculated carbon budgets for a chronosequence of harvested jack pine ( Pinus banksiana Lamb.) stands (0‐, 5‐, 10‐, and∼29‐year‐old) and a∼79‐year‐old stand that originated after wildfire. We measured total ecosystem C content (TEC), above‐, and belowground net primary productivity (NPP) for each stand. All values are reported in order for the 0‐, 5‐, 10‐, 29‐, and 79‐year‐old stands, respectively, for May 1999 through April 2000. Total annual NPP (NPP T ) for the stands (Mg C ha −1 yr −1 ±1 SD) was 0.9±0.3, 1.3±0.1, 2.7±0.6, 3.5±0.3, and 1.7±0.4. We correlated periodic soil surface CO 2 fluxes ( R S ) with soil temperature to model annual R S for the stands (Mg C ha −1 yr −1 ±1 SD) as 4.4±0.1, 2.4±0.0, 3.3±0.1, 5.7±0.3, and 3.2±0.2. We estimated net ecosystem productivity (NEP) as NPP T minus R H (where R H was calculated using a Monte Carlo approach as coarse woody debris respiration plus 30–70% of total annual R S ). Excluding C losses during wood processing, NEP (Mg C ha −1 yr −1 ±1 SD) for the stands was estimated to be −1.9±0.7, −0.4±0.6, 0.4±0.9, 0.4±1.0, and −0.2±0.7 (negative values indicate net sources to the atmosphere.) We also calculated NEP values from the changes in TEC among stands. Only the 0‐year‐old stand showed significantly different NEP between the two methods, suggesting a possible mismatch for the chronosequence. The spatial and methodological uncertainties allow us to say little for certain except that the stand becomes a source of C to the atmosphere following logging." @default.
- W2134993887 created "2016-06-24" @default.
- W2134993887 creator A5017776379 @default.
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- W2134993887 creator A5057785912 @default.
- W2134993887 date "2004-08-01" @default.
- W2134993887 modified "2023-10-17" @default.
- W2134993887 title "Effects of logging on carbon dynamics of a jack pine forest in Saskatchewan, Canada" @default.
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