Table 17.1a. Relative standard errors (%) of total above-ground biomass 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 70.48 99.95 77.95 95.26 - - - - - - 24.78 23.11
Treed Mixedwood 18.88 16.90 16.87 11.30 11.53 6.43 15.46 18.39 37.44 67.78 70.45 - 4.41
Treed Broadleaf 21.58 17.23 16.95 14.01 8.11 17.77 25.53 31.08 64.41 99.99 - - 5.94
Treed Coniferous 18.78 11.57 9.69 8.75 7.44 3.00 9.95 14.14 18.94 34.55 36.41 - 2.47
Subtotal 12.10 8.41 7.68 7.17 5.22 2.72 8.97 11.61 16.74 32.92 32.35 24.78 2.07
Taiga Shield Non-treed - - 99.98 98.78 97.63 - - - - - - 4.71 16.16
Treed Broadleaf 26.35 29.74 53.61 32.03 36.87 7.94 79.68 - - - - - 7.32
Treed Mixedwood 22.42 20.83 26.61 34.78 22.24 13.65 7.14 55.20 - - - - 5.80
Treed Coniferous 16.77 10.26 8.03 8.53 6.62 5.16 3.43 4.20 31.32 57.60 20.40 - 2.06
Subtotal 12.78 9.22 7.81 8.15 6.41 4.61 3.21 4.19 31.32 57.60 20.40 4.71 1.95
Boreal Shield Non-treed 36.68 68.25 44.21 46.44 41.48 44.57 75.36 98.60 99.86 100.00 100.00 4.34 8.65
Treed Broadleaf 7.66 5.66 5.04 5.68 5.81 13.15 22.08 29.61 75.51 67.28 - - 2.77
Treed Mixedwood 5.78 4.18 3.81 3.75 3.89 8.43 11.63 29.59 51.61 68.50 72.89 - 1.86
Treed Coniferous 5.11 3.41 3.12 2.82 2.53 4.26 3.58 9.47 17.88 30.72 58.02 - 1.29
Subtotal 3.42 2.43 2.20 2.14 2.02 3.72 3.41 8.76 16.46 26.73 44.58 4.34 1.00
Atlantic Maritime Non-treed 68.90 69.28 52.11 55.42 99.95 - - - - - - 7.02 6.94
Treed Broadleaf 17.26 10.44 9.16 8.85 10.50 19.10 41.08 76.77 99.99 - 99.99 - 4.69
Treed Mixedwood 8.49 6.64 5.78 5.40 7.60 13.77 54.96 66.63 - 98.67 - - 2.96
Treed Coniferous 10.62 7.04 5.70 5.87 7.77 10.92 22.75 30.90 99.99 - - - 3.00
Subtotal 6.49 4.47 3.81 3.72 4.95 8.15 19.81 32.92 82.39 98.67 99.99 7.02 1.97
Mixedwood Plains Non-treed - - - - - - - - - - - 16.44 16.44
Treed Coniferous 33.49 14.40 14.86 15.53 20.93 46.64 60.19 91.21 - - - - 8.14
Treed Mixedwood 26.52 16.92 10.30 16.21 20.98 33.95 45.50 63.55 - - - - 7.19
Treed Broadleaf 20.45 11.68 9.49 8.83 11.17 26.71 41.12 57.44 99.99 - - - 5.14
Subtotal 15.59 8.13 6.57 7.18 9.52 20.83 32.05 41.75 99.99 - - 16.44 3.84
Boreal Plains Non-treed 32.37 42.70 27.07 23.70 44.36 91.53 86.22 75.70 - - - 8.39 13.23
Treed Mixedwood 13.62 9.97 10.24 6.32 7.52 9.20 11.52 16.14 23.41 44.96 99.29 - 3.39
Treed Broadleaf 10.98 7.38 7.98 5.68 6.87 9.33 16.04 31.43 59.39 100.00 - - 3.16
Treed Coniferous 15.29 8.77 6.21 4.57 4.96 5.89 6.95 10.05 19.26 41.80 34.72 - 2.32
Subtotal 7.60 4.96 4.64 3.21 3.63 4.41 5.65 8.47 16.74 38.69 34.24 8.39 1.66
Prairies Treed Mixedwood 56.56 40.53 51.57 46.89 69.67 93.11 100.00 - - - - - 31.93
Non-treed 41.20 75.44 84.99 - - - - - - - - 28.44 27.31
Treed Coniferous 78.12 98.26 69.73 44.05 81.41 89.27 100.00 95.95 - - - - 40.23
Treed Broadleaf 14.73 10.89 20.02 29.17 57.46 73.55 - 100.00 - - - - 7.95
Subtotal 14.50 10.76 18.71 25.28 44.91 59.38 74.65 92.11 - - - 28.44 7.47
Taiga Cordillera Non-treed - - 89.20 67.08 99.60 - - - - - - 0.00 59.59
Treed Broadleaf 69.37 79.38 65.97 67.58 17.15 99.99 - - - - - - 15.97
Treed Mixedwood 83.50 66.10 49.11 40.83 44.44 48.98 12.71 99.99 99.99 - - - 12.23
Treed Coniferous 37.71 26.05 19.78 15.21 19.65 19.11 6.44 37.04 55.01 99.99 - - 5.56
Subtotal 46.19 23.36 18.13 14.22 14.25 18.35 6.27 36.62 48.20 99.99 - 0.00 5.29
Boreal Cordillera Non-treed 100.00 45.07 42.68 42.50 28.38 28.59 56.86 100.00 - - - 46.25 15.76
Treed Broadleaf 44.77 28.48 21.98 24.88 18.51 29.34 56.29 73.84 43.77 100.00 67.92 - 13.81
Treed Mixedwood 30.58 18.88 25.94 26.37 17.47 15.26 21.69 23.54 51.18 75.69 51.58 - 8.50
Treed Coniferous 32.81 24.31 15.92 13.42 9.26 7.53 8.22 10.04 12.71 22.25 10.75 - 3.57
Subtotal 21.30 14.72 11.77 10.81 7.36 6.63 7.81 9.21 12.29 21.41 10.50 46.25 3.17
Pacific Maritime Non-treed - - - - - - - - - - - 13.78 13.78
Treed Mixedwood 48.88 26.56 20.68 32.60 30.27 33.27 49.91 43.80 46.68 99.98 48.31 - 12.79
Treed Broadleaf 76.30 53.06 29.17 27.13 35.57 37.08 41.51 48.79 99.98 47.48 46.12 - 13.51
Treed Coniferous 17.96 13.35 14.81 17.33 16.50 18.95 20.28 25.11 16.38 13.96 4.80 - 3.81
Subtotal 17.39 12.29 12.94 14.80 14.11 15.88 18.78 22.49 16.17 13.39 4.77 13.78 3.64
Montane Cordillera Non-treed 89.65 100.14 - 99.94 100.14 69.89 85.28 100.00 - 100.00 - 7.30 7.26
Treed Broadleaf 46.13 25.58 24.41 20.92 16.71 22.66 18.94 26.45 55.22 70.67 62.15 - 8.36
Treed Mixedwood 49.91 19.49 24.14 16.76 13.83 21.27 13.72 17.45 24.59 39.22 26.61 - 6.97
Treed Coniferous 14.30 8.72 11.90 8.03 6.25 5.64 5.01 5.48 6.83 7.03 5.04 - 2.16
Subtotal 16.59 7.69 10.13 6.89 5.40 5.40 4.63 5.17 6.70 6.91 5.02 7.30 2.01
Hudson Plains Non-treed - - 99.99 99.99 99.99 99.99 - - - - - 16.31 16.23
Treed Broadleaf 50.49 31.21 55.77 80.10 45.10 96.14 47.96 - - - - - 30.65
Treed Mixedwood 49.66 42.90 33.13 33.17 45.47 7.40 83.55 76.49 - - - - 7.11
Treed Coniferous 33.87 13.89 10.38 12.36 17.61 12.51 8.94 22.49 65.23 99.99 - - 4.90
Subtotal 26.57 13.33 9.92 11.65 16.29 8.43 8.90 22.36 65.23 99.99 - 16.31 4.38
Canada Non-treed 26.42 31.98 37.41 32.84 22.36 23.41 47.82 58.07 99.86 99.59 100.00 2.76 5.50
Treed Broadleaf 5.43 3.61 3.48 3.34 3.38 5.54 10.68 15.62 33.89 34.20 35.27 - 1.67
Treed Mixedwood 4.46 3.12 2.93 2.71 2.96 4.16 5.04 9.19 16.40 30.54 23.69 - 1.33
Treed Coniferous 4.00 2.57 2.58 2.21 1.97 1.88 1.98 2.87 5.05 5.85 3.35 - 0.88
Total 2.62 1.78 1.74 1.56 1.48 1.64 1.84 2.71 4.83 5.66 3.32 2.76 0.70
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.