Table 15.1a. Relative standard errors (%) of total tree volume on forest land by forest type, age class and terrestrial ecozone in Canada.
Terrestrial ecozone Forest type 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
Taiga Plains Non-treed 60.18 99.99 99.99 87.10 72.45 - - - - - - 0.00 67.12
Treed Mixedwood 19.44 15.65 16.33 10.63 11.63 6.43 15.94 18.99 41.10 67.79 70.55 - 4.44
Treed Broadleaf 20.99 17.77 17.85 15.07 8.18 18.22 26.32 31.00 65.70 99.99 - - 6.15
Treed Coniferous 16.70 10.12 8.37 8.06 7.28 2.89 9.87 13.61 19.12 33.83 38.20 - 2.35
Subtotal 12.01 7.71 7.02 7.20 5.18 2.62 9.19 11.42 17.12 33.61 33.86 0.00 2.01
Taiga Shield Non-treed - - 99.98 96.10 97.11 - - - - - - 0.00 89.97
Treed Broadleaf 25.92 28.06 56.06 30.99 25.43 7.95 80.99 - - - - - 7.29
Treed Mixedwood 23.85 19.18 25.94 30.60 22.82 13.67 7.21 54.93 - - - - 5.71
Treed Coniferous 18.15 9.68 7.44 8.01 6.42 5.19 3.23 4.62 31.09 57.23 20.41 - 2.02
Subtotal 13.05 8.68 7.23 7.63 6.22 4.63 3.07 4.62 31.09 57.23 20.41 0.00 1.91
Boreal Shield Non-treed 44.23 69.11 42.82 44.05 40.13 44.69 75.11 98.92 99.74 100.00 100.00 0.00 24.19
Treed Broadleaf 7.14 5.51 4.80 5.46 5.60 12.82 21.07 28.81 75.34 66.55 - - 2.63
Treed Mixedwood 5.57 4.17 3.81 3.79 3.90 8.49 11.93 28.93 52.39 68.14 71.26 - 1.86
Treed Coniferous 5.24 3.50 2.99 2.81 2.53 4.23 3.50 9.31 18.50 30.00 57.62 - 1.27
Subtotal 3.38 2.49 2.12 2.11 1.99 3.69 3.34 8.62 17.01 27.81 44.30 0.00 0.98
Atlantic Maritime Non-treed 64.95 74.96 54.92 62.99 99.95 - - - - - - 0.00 33.23
Treed Broadleaf 13.62 9.41 8.98 8.55 10.28 18.82 41.90 73.67 99.99 - 99.99 - 4.48
Treed Mixedwood 7.87 6.37 5.80 5.39 7.48 13.26 53.35 61.84 - 98.67 - - 2.90
Treed Coniferous 10.32 6.82 5.71 5.84 7.56 11.19 22.60 30.93 99.99 - - - 2.96
Subtotal 5.87 4.29 3.73 3.63 4.80 7.92 19.68 29.55 76.70 98.67 99.99 0.00 1.90
Mixedwood Plains Non-treed - - - - - - - - - - - 0.00 0.00
Treed Coniferous 33.52 14.58 14.98 15.93 21.13 46.39 60.69 91.43 - - - - 8.25
Treed Mixedwood 26.16 16.98 10.38 16.41 20.86 34.22 45.53 62.84 - - - - 7.24
Treed Broadleaf 19.75 11.52 9.30 8.76 11.13 26.31 40.49 57.10 99.99 - - - 5.05
Subtotal 15.67 8.11 6.42 7.13 9.38 20.35 30.85 43.08 99.99 - - 0.00 3.78
Boreal Plains Non-treed 33.00 37.09 26.91 28.44 51.85 90.00 86.64 77.91 - - - 0.00 52.08
Treed Mixedwood 13.30 10.07 10.30 6.54 7.64 9.21 11.64 16.15 23.27 43.45 99.19 - 3.45
Treed Broadleaf 10.92 7.37 7.95 5.64 6.80 9.24 15.91 32.61 59.56 100.00 - - 3.14
Treed Coniferous 14.57 8.13 6.03 4.78 5.09 5.94 7.26 10.30 19.61 39.93 35.51 - 2.37
Subtotal 7.43 4.82 4.63 3.27 3.65 4.42 5.79 8.65 17.00 36.83 35.00 0.00 1.68
Prairies Non-treed 46.52 45.58 70.01 - - - - - - - - 0.00 40.62
Treed Mixedwood 58.90 40.68 50.58 46.78 68.92 92.92 100.00 - - - - - 30.67
Treed Coniferous 73.20 96.07 65.45 43.84 81.35 88.76 100.00 96.14 - - - - 38.43
Treed Broadleaf 14.43 10.80 20.37 29.64 56.31 73.84 - 100.00 - - - - 7.94
Subtotal 14.00 10.66 18.94 25.67 43.81 59.62 74.80 92.82 - - - 0.00 7.59
Taiga Cordillera Non-treed - - 70.42 74.95 99.55 - - - - - - 0.00 64.04
Treed Broadleaf 61.03 69.89 63.99 89.53 16.24 99.99 - - - - - - 15.03
Treed Mixedwood 62.46 51.08 41.51 53.18 43.80 48.77 12.89 99.99 99.99 - - - 13.07
Treed Coniferous 34.90 21.91 17.31 16.25 21.06 19.21 6.45 37.91 55.99 99.99 - - 5.76
Subtotal 34.05 19.95 15.99 15.20 13.80 18.42 6.31 37.47 48.87 99.99 - 0.00 5.48
Boreal Cordillera Non-treed 100.00 37.12 38.62 50.77 28.89 28.46 57.05 100.00 - - - 0.00 17.63
Treed Broadleaf 45.31 27.05 22.07 24.57 18.59 29.67 59.94 76.87 47.20 100.00 67.82 - 15.18
Treed Mixedwood 27.29 19.32 24.42 28.23 16.03 15.66 22.76 23.11 52.49 79.19 49.29 - 8.81
Treed Coniferous 28.08 20.22 15.99 14.59 9.50 7.78 8.25 10.11 12.80 20.74 11.29 - 3.68
Subtotal 20.27 13.64 11.81 11.72 7.41 6.83 7.98 9.29 12.38 21.28 11.02 0.00 3.29
Pacific Maritime Non-treed - - - - - - - - - - - 0.00 0.00
Treed Mixedwood 48.64 26.72 20.98 31.95 30.58 33.47 49.91 43.99 47.15 99.98 49.44 - 12.75
Treed Broadleaf 72.79 54.87 29.60 27.36 34.91 36.86 41.89 48.94 99.98 47.41 46.20 - 13.44
Treed Coniferous 20.78 13.97 14.97 17.39 16.79 19.17 20.43 25.80 16.55 14.15 4.91 - 3.93
Subtotal 19.66 12.76 13.07 14.85 14.37 16.02 18.90 23.08 16.33 13.56 4.88 0.00 3.76
Montane Cordillera Non-treed 75.66 100.14 - 99.94 100.14 64.30 93.75 100.00 - 100.00 - 0.00 54.33
Treed Broadleaf 45.79 26.62 25.66 21.63 17.02 22.63 18.88 26.60 55.32 71.09 63.94 - 8.52
Treed Mixedwood 59.49 22.05 24.92 17.11 14.20 22.57 13.99 18.13 25.45 38.99 27.52 - 7.33
Treed Coniferous 19.26 9.19 12.42 8.37 6.48 5.83 5.24 5.74 7.48 7.19 5.27 - 2.28
Subtotal 21.80 8.12 10.53 7.16 5.59 5.63 4.83 5.40 7.33 7.06 5.24 0.00 2.13
Hudson Plains Non-treed - - 99.99 99.99 99.99 99.99 - - - - - 0.00 71.86
Treed Broadleaf 54.54 32.52 55.28 80.76 46.75 94.51 49.27 - - - - - 29.80
Treed Mixedwood 51.54 40.49 32.88 33.20 44.10 6.95 83.70 76.79 - - - - 6.63
Treed Coniferous 28.61 13.58 9.84 11.83 17.35 12.45 7.59 22.19 64.49 99.99 - - 4.52
Subtotal 25.41 13.00 9.45 11.16 15.86 7.86 7.57 22.07 64.49 99.99 - 0.00 4.04
Canada Non-treed 29.95 43.42 42.34 34.27 22.36 23.42 48.17 51.55 99.74 89.18 100.00 0.00 13.34
Treed Broadleaf 5.12 3.58 3.52 3.43 3.38 5.67 11.30 16.46 36.53 34.35 35.83 - 1.70
Treed Mixedwood 4.30 3.12 2.96 2.78 3.02 4.25 5.43 9.24 16.98 33.00 22.98 - 1.37
Treed Coniferous 4.09 2.55 2.55 2.27 2.02 1.88 2.02 3.21 5.35 5.92 3.47 - 0.93
Total 2.58 1.77 1.74 1.60 1.51 1.65 1.89 2.99 5.12 5.76 3.45 0.00 0.74
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 Arctic ecozones (Arctic Cordillera, Northern Arctic, Southern Arctic), and the Taiga Plains and Hudson Plains ecozones located in Nunavut, are not inventoried. These non-inventoried areas total 262,189.89 thousand ha.
1 Missing or unknown age class.