Table 16.2b. Confidence interval (million m3) of total tree volume by species group, age class and boreal zone in Canada.
Boreal zone Species group Age (years) Total
1-20 21-40 41-60 61-80 81-100 101-120 121-140 141-160 161-180 181-200 201+ Other1
Non-boreal Unclassified ±1.49 ±1.80 ±0.26 ±0.28 ±0.19 ±0.33 - - - - - 0.00 ±2.40
Unspecified hardwoods ±6.62 ±5.44 ±6.87 ±3.58 ±4.25 ±0.49 ±0.28 - - - - 0.00 ±12.32
Unspecified conifers ±6.69 ±8.03 ±5.13 ±4.42 ±0.75 - - - - - - 0.00 ±12.48
Larch ±0.51 ±1.96 ±5.27 ±7.59 ±17.79 ±15.73 ±12.09 ±8.16 ±4.33 ±2.83 ±12.32 - ±32.32
Other hardwoods ±0.81 ±5.57 ±17.33 ±17.42 ±14.45 ±9.50 ±2.99 ±0.87 ±0.03 ±3.74 ±7.21 - ±31.79
Birch ±3.24 ±14.14 ±28.34 ±29.45 ±35.46 ±24.43 ±7.32 ±7.01 ±0.39 ±0.79 ±1.34 - ±61.97
Poplar ±7.64 ±21.15 ±29.31 ±39.87 ±46.49 ±56.16 ±21.96 ±20.05 ±2.86 ±11.00 ±12.21 - ±97.12
Cedar & other conifers ±1.70 ±6.07 ±18.17 ±14.04 ±13.19 ±13.42 ±8.75 ±15.20 ±12.07 ±15.37 ±191.01 - ±195.18
Maple ±4.49 ±10.13 ±39.76 ±52.80 ±53.80 ±24.87 ±9.26 ±4.14 ±7.29 - ±1.21 0.00 ±90.34
Douglas-fir ±1.01 ±12.87 ±48.00 ±70.73 ±59.78 ±66.88 ±73.59 ±58.70 ±22.57 ±21.97 ±90.75 - ±183.33
Pine ±8.06 ±21.26 ±27.68 ±42.04 ±84.01 ±63.83 ±66.72 ±59.07 ±44.80 ±22.40 ±39.25 - ±161.78
Fir ±5.21 ±17.47 ±26.81 ±31.97 ±31.25 ±30.33 ±28.05 ±41.97 ±45.89 ±35.81 ±176.39 - ±202.53
Spruce ±4.75 ±16.06 ±43.82 ±35.97 ±39.39 ±37.53 ±57.17 ±55.51 ±38.33 ±29.90 ±117.07 0.00 ±169.92
Hemlock ±2.49 ±20.83 ±46.20 ±58.65 ±53.41 ±26.69 ±25.29 ±21.48 ±21.77 ±19.32 ±297.35 - ±316.14
Subtotal ±17.48 ±50.33 ±108.71 ±135.50 ±151.80 ±128.36 ±124.16 ±114.04 ±82.41 ±62.56 ±424.09 0.00 ±539.92
Boreal Unclassified ±5.12 ±2.07 ±0.02 ±0.09 ±0.09 ±0.06 ±0.12 ±0.23 ±0.07 - - 0.00 ±5.53
Other hardwoods ±0.51 ±0.83 ±1.81 ±1.73 ±2.54 ±1.62 ±1.09 ±0.94 ±0.22 ±0.19 - 0.00 ±4.30
Cedar & other conifers ±0.13 ±0.19 ±0.69 ±1.37 ±3.57 ±5.18 ±2.90 ±2.14 ±0.97 - - - ±7.48
Unspecified hardwoods ±8.44 ±5.12 ±0.31 ±0.03 - - <0.01 - - - - - ±9.88
Maple ±0.14 ±1.67 ±10.97 ±13.36 ±14.42 ±0.44 - - - - - - ±22.58
Unspecified conifers ±14.63 ±18.68 ±8.91 ±1.70 ±0.30 - - - - - - 0.00 ±25.41
Larch ±2.87 ±5.46 ±11.81 ±14.71 ±15.11 ±13.44 ±10.16 ±7.78 ±2.37 ±0.81 ±2.18 0.00 ±31.27
Birch ±5.11 ±14.56 ±25.99 ±31.13 ±21.94 ±40.02 ±7.58 ±3.26 ±0.58 ±1.29 ±1.90 0.00 ±63.56
Fir ±5.30 ±20.63 ±28.77 ±31.07 ±32.49 ±27.97 ±26.72 ±23.68 ±24.52 ±11.70 ±36.15 0.00 ±86.05
Pine ±18.49 ±42.91 ±47.00 ±79.79 ±54.53 ±73.25 ±70.06 ±50.45 ±29.72 ±18.15 ±32.13 0.00 ±169.70
Poplar ±21.66 ±38.99 ±72.18 ±136.46 ±118.57 ±82.43 ±73.47 ±41.15 ±13.11 ±6.06 ±6.21 0.00 ±232.41
Spruce ±12.57 ±48.79 ±75.03 ±124.82 ±132.34 ±262.27 ±175.20 ±98.57 ±58.20 ±23.53 ±67.57 0.00 ±398.71
Subtotal ±36.65 ±82.42 ±122.05 ±207.14 ±191.15 ±289.04 ±204.66 ±120.80 ±71.06 ±32.55 ±83.38 0.00 ±505.53
Canada Unclassified ±5.33 ±2.75 ±0.27 ±0.30 ±0.21 ±0.34 ±0.12 ±0.23 ±0.07 - - 0.00 ±6.03
Unspecified hardwoods ±10.73 ±7.47 ±6.88 ±3.58 ±4.25 ±0.49 ±0.28 - - - - 0.00 ±15.79
Other hardwoods ±0.96 ±5.63 ±17.43 ±17.50 ±14.68 ±9.64 ±3.19 ±1.28 ±0.22 ±3.75 ±7.21 0.00 ±32.08
Unspecified conifers ±16.09 ±20.34 ±10.28 ±4.74 ±0.81 - - - - - - 0.00 ±28.30
Larch ±2.92 ±5.80 ±12.93 ±16.55 ±23.34 ±20.69 ±15.79 ±11.27 ±4.93 ±2.94 ±12.51 0.00 ±44.97
Cedar & other conifers ±1.71 ±6.07 ±18.18 ±14.11 ±13.66 ±14.38 ±9.22 ±15.35 ±12.11 ±15.37 ±191.01 - ±195.32
Maple ±4.50 ±10.27 ±41.25 ±54.46 ±55.70 ±24.88 ±9.26 ±4.14 ±7.29 - ±1.21 0.00 ±93.12
Birch ±6.05 ±20.29 ±38.45 ±42.85 ±41.70 ±46.89 ±10.54 ±7.73 ±0.69 ±1.51 ±2.33 0.00 ±88.77
Douglas-fir ±1.01 ±12.87 ±48.00 ±70.73 ±59.78 ±66.88 ±73.59 ±58.70 ±22.57 ±21.97 ±90.75 - ±183.33
Hemlock ±2.49 ±20.83 ±46.20 ±58.65 ±53.41 ±26.69 ±25.29 ±21.48 ±21.77 ±19.32 ±297.35 - ±316.14
Fir ±7.44 ±27.03 ±39.33 ±44.58 ±45.08 ±41.26 ±38.74 ±48.19 ±52.03 ±37.67 ±180.06 0.00 ±220.06
Pine ±20.17 ±47.89 ±54.55 ±90.19 ±100.16 ±97.17 ±96.74 ±77.68 ±53.76 ±28.83 ±50.72 0.00 ±234.46
Poplar ±22.96 ±44.35 ±77.90 ±142.17 ±127.36 ±99.74 ±76.68 ±45.78 ±13.42 ±12.56 ±13.70 0.00 ±251.88
Spruce ±13.44 ±51.37 ±86.89 ±129.90 ±138.07 ±264.95 ±184.30 ±113.13 ±69.69 ±38.05 ±135.17 0.00 ±433.41
Total ±40.60 ±96.57 ±163.45 ±247.52 ±244.10 ±316.26 ±239.38 ±166.12 ±108.82 ±70.52 ±432.21 0.00 ±739.65
Source: Canada's National Forest Inventory, combined remeasured (2007-2017) and projected (2006-2017 with NFI projection system) data (Version 3.1, October 2025) (http://nfi.nfis.org)
Note: The Non-boreal zone in the Arctic ecozones (Arctic Cordillera, Northern Arctic, Southern Arctic) are not inventoried. The total land and water area amounts to approximately 252,202.08 thousand ha.
1 Missing or unknown age class.