Table 17.1b. Confidence interval (million tonnes) 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 <0.01 <0.01 0.00 ±0.01 <0.01 - - - - - - ±0.08 ±0.08
Treed Mixedwood ±0.75 ±4.09 ±6.38 ±9.66 ±9.45 ±27.83 ±11.37 ±5.38 ±3.37 ±4.16 ±1.76 - ±34.71
Treed Broadleaf ±1.74 ±4.01 ±9.83 ±29.14 ±29.12 ±18.06 ±21.71 ±13.73 ±4.87 ±0.15 - - ±53.13
Treed Coniferous ±1.33 ±4.68 ±10.91 ±17.38 ±17.51 ±90.09 ±17.85 ±17.47 ±11.29 ±3.61 ±3.58 - ±98.21
Subtotal ±2.32 ±7.39 ±16.01 ±35.28 ±35.27 ±96.01 ±30.32 ±22.86 ±12.75 ±5.51 ±3.99 ±0.08 ±116.93
Taiga Shield Non-treed - - ±4.35 ±0.34 ±0.01 - - - - - - ±1.09 ±4.50
Treed Broadleaf ±0.90 ±1.60 ±2.86 ±1.10 ±1.17 ±6.18 ±0.14 - - - - - ±7.24
Treed Mixedwood ±0.87 ±1.61 ±2.02 ±3.57 ±3.33 ±2.02 ±7.38 ±0.97 - - - - ±9.52
Treed Coniferous ±2.81 ±9.14 ±17.78 ±15.13 ±31.10 ±34.74 ±43.09 ±51.58 ±1.06 ±2.81 ±14.45 - ±86.86
Subtotal ±3.07 ±9.42 ±18.64 ±15.58 ±31.30 ±35.35 ±43.72 ±51.59 ±1.06 ±2.81 ±14.45 ±1.09 ±87.80
Boreal Shield Non-treed ±0.65 ±1.09 ±1.33 ±9.72 ±3.27 ±3.89 ±0.56 ±0.15 ±0.30 ±0.20 ±0.12 ±3.97 ±11.83
Treed Broadleaf ±6.86 ±14.25 ±32.03 ±44.45 ±44.59 ±20.75 ±6.57 ±2.63 ±3.16 ±1.23 - - ±75.71
Treed Mixedwood ±9.08 ±18.39 ±29.19 ±38.73 ±41.01 ±17.82 ±9.33 ±6.59 ±3.84 ±1.83 ±1.65 - ±70.17
Treed Coniferous ±10.89 ±33.01 ±48.23 ±59.22 ±62.92 ±68.77 ±56.13 ±21.42 ±10.04 ±1.93 ±1.83 - ±139.45
Subtotal ±15.77 ±40.40 ±64.86 ±84.12 ±87.40 ±74.11 ±57.28 ±22.56 ±11.20 ±2.94 ±2.46 ±3.97 ±173.90
Atlantic Maritime Non-treed ±0.03 ±0.01 ±0.02 ±0.02 <0.01 - - - - - - ±0.70 ±0.70
Treed Broadleaf ±4.32 ±8.00 ±15.21 ±20.13 ±17.88 ±11.11 ±0.74 ±1.83 ±0.37 - ±0.08 - ±34.15
Treed Mixedwood ±3.98 ±8.70 ±14.83 ±18.76 ±13.83 ±8.52 ±2.25 ±0.58 - ±0.22 - - ±30.54
Treed Coniferous ±5.11 ±12.60 ±14.19 ±18.85 ±16.95 ±9.82 ±3.94 ±1.05 ±0.09 - - - ±33.79
Subtotal ±7.79 ±17.28 ±25.55 ±33.35 ±28.25 ±17.10 ±4.60 ±2.19 ±0.38 ±0.22 ±0.08 ±0.70 ±56.93
Mixedwood Plains Non-treed - - - - - - - - - - - ±0.41 ±0.41
Treed Coniferous ±1.12 ±1.92 ±4.44 ±2.78 ±1.21 ±0.44 ±0.23 ±0.88 - - - - ±5.91
Treed Mixedwood ±0.77 ±2.54 ±6.38 ±6.75 ±4.42 ±2.51 ±0.82 ±0.41 - - - - ±10.95
Treed Broadleaf ±0.78 ±2.51 ±12.34 ±11.76 ±11.17 ±5.20 ±2.53 ±0.86 ±0.41 - - - ±21.37
Subtotal ±1.56 ±4.05 ±14.59 ±13.84 ±12.07 ±5.79 ±2.67 ±1.30 ±0.41 - - ±0.41 ±24.73
Boreal Plains Non-treed ±0.21 ±0.36 ±0.15 ±0.07 ±0.38 ±2.95 ±0.33 ±0.09 - - - ±1.59 ±3.42
Treed Mixedwood ±4.61 ±8.64 ±14.96 ±23.13 ±23.61 ±20.30 ±16.07 ±7.09 ±3.03 ±0.63 ±0.36 - ±46.29
Treed Broadleaf ±9.29 ±14.68 ±32.49 ±55.75 ±42.04 ±29.61 ±19.38 ±7.16 ±1.31 ±0.14 - - ±86.82
Treed Coniferous ±7.23 ±15.03 ±21.43 ±50.05 ±38.15 ±40.16 ±31.01 ±22.07 ±16.96 ±7.64 ±8.29 - ±90.41
Subtotal ±12.64 ±22.72 ±41.70 ±78.41 ±61.48 ±53.94 ±39.94 ±24.26 ±17.28 ±7.67 ±8.30 ±1.59 ±133.66
Prairies Treed Mixedwood ±0.09 ±0.19 ±0.44 ±0.45 ±0.27 ±1.09 ±0.11 - - - - - ±1.31
Non-treed ±0.04 ±0.05 <0.01 - - - - - - - - ±1.15 ±1.15
Treed Coniferous ±0.06 ±0.44 ±1.45 ±0.11 ±0.79 ±2.17 ±0.22 ±0.52 - - - - ±2.83
Treed Broadleaf ±3.00 ±7.79 ±5.02 ±1.87 ±2.06 ±0.40 - ±0.02 - - - - ±10.14
Subtotal ±3.00 ±7.80 ±5.25 ±1.93 ±2.22 ±2.46 ±0.24 ±0.52 - - - ±1.15 ±10.67
Taiga Cordillera Non-treed - - ±0.15 ±1.39 ±2.39 - - - - - - 0.00 ±2.77
Treed Broadleaf ±0.18 ±0.49 ±0.43 ±0.06 ±2.47 ±0.02 - - - - - - ±2.56
Treed Mixedwood ±0.17 ±0.70 ±1.04 ±0.86 ±0.68 ±0.71 ±2.67 ±0.29 ±2.17 - - - ±3.90
Treed Coniferous ±0.03 ±1.27 ±4.79 ±6.07 ±6.12 ±5.62 ±49.59 ±8.83 ±4.08 ±0.56 - - ±51.81
Subtotal ±0.25 ±1.54 ±4.92 ±6.29 ±7.05 ±5.66 ±49.66 ±8.83 ±4.62 ±0.56 - 0.00 ±52.10
Boreal Cordillera Non-treed ±0.01 ±0.94 ±2.41 ±3.38 ±5.52 ±6.80 ±2.94 ±0.24 - - - ±0.11 ±10.17
Treed Broadleaf ±0.56 ±1.16 ±4.33 ±8.27 ±6.32 ±12.24 ±15.95 ±7.93 ±0.59 ±1.83 ±0.69 - ±24.50
Treed Mixedwood ±0.42 ±1.13 ±8.40 ±16.91 ±10.15 ±10.08 ±10.50 ±12.32 ±6.47 ±6.06 ±6.70 - ±30.79
Treed Coniferous ±0.94 ±3.27 ±14.89 ±23.04 ±22.74 ±47.44 ±40.56 ±32.31 ±31.34 ±11.01 ±38.79 - ±93.96
Subtotal ±1.17 ±3.77 ±17.80 ±29.94 ±26.27 ±50.48 ±44.93 ±35.48 ±32.00 ±12.70 ±39.37 ±0.11 ±102.37
Pacific Maritime Non-treed - - - - - - - - - - - ±0.44 ±0.44
Treed Mixedwood ±0.21 ±2.76 ±5.56 ±12.96 ±7.49 ±6.15 ±2.48 ±3.11 ±0.76 ±0.01 ±5.66 - ±18.68
Treed Broadleaf ±0.24 ±2.73 ±9.38 ±8.21 ±12.02 ±13.32 ±4.41 ±3.29 ±0.08 ±4.29 ±5.01 - ±23.63
Treed Coniferous ±3.62 ±19.18 ±51.26 ±57.27 ±40.30 ±35.23 ±34.65 ±26.19 ±20.09 ±14.97 ±191.47 - ±219.83
Subtotal ±3.64 ±19.57 ±52.40 ±59.29 ±42.71 ±38.16 ±35.01 ±26.58 ±20.10 ±15.58 ±191.62 ±0.44 ±221.89
Montane Cordillera Non-treed ±0.03 ±0.02 - <0.01 ±0.06 ±0.01 ±0.01 <0.01 - <0.01 - ±1.77 ±1.77
Treed Broadleaf ±0.03 ±4.07 ±4.56 ±8.83 ±17.32 ±11.78 ±9.34 ±7.01 ±1.00 ±4.58 ±2.55 - ±26.81
Treed Mixedwood ±3.14 ±4.12 ±14.25 ±9.42 ±22.64 ±28.77 ±13.64 ±14.04 ±3.13 ±3.53 ±2.75 - ±45.52
Treed Coniferous ±2.60 ±14.83 ±25.31 ±27.84 ±56.56 ±59.21 ±61.72 ±62.16 ±45.40 ±34.40 ±128.30 - ±189.02
Subtotal ±4.07 ±15.92 ±29.41 ±30.69 ±63.33 ±66.88 ±63.90 ±64.11 ±45.52 ±34.88 ±128.36 ±1.77 ±196.27
Hudson Plains Non-treed - - <0.01 ±0.01 ±0.01 <0.01 - - - - - ±0.75 ±0.75
Treed Broadleaf ±0.25 ±0.11 ±0.25 ±1.26 ±0.97 ±0.37 ±0.03 - - - - - ±1.67
Treed Mixedwood ±0.07 ±0.68 ±1.21 ±1.44 ±1.49 ±3.48 ±0.71 ±0.15 - - - - ±4.34
Treed Coniferous ±0.47 ±5.28 ±6.52 ±8.13 ±9.61 ±10.52 ±15.55 ±7.04 ±0.76 ±0.01 - - ±25.13
Subtotal ±0.54 ±5.32 ±6.64 ±8.35 ±9.77 ±11.09 ±15.56 ±7.04 ±0.76 ±0.01 - ±0.75 ±25.57
Canada Non-treed ±0.68 ±1.48 ±5.15 ±10.39 ±6.86 ±8.37 ±3.01 ±0.30 ±0.30 ±0.20 ±0.12 ±5.03 ±17.00
Treed Broadleaf ±12.88 ±24.37 ±52.18 ±81.83 ±74.46 ±47.84 ±35.47 ±19.33 ±6.09 ±6.66 ±5.66 - ±140.56
Treed Mixedwood ±11.47 ±23.27 ±41.10 ±55.54 ±56.79 ±50.68 ±29.07 ±21.97 ±9.60 ±8.39 ±9.51 - ±113.22
Treed Coniferous ±15.13 ±47.03 ±83.66 ±107.68 ±111.56 ±151.35 ±125.14 ±98.16 ±63.09 ±40.15 ±234.35 - ±377.09
Total ±22.95 ±57.87 ±106.94 ±146.57 ±145.82 ±166.83 ±133.31 ±102.43 ±64.11 ±41.55 ±234.61 ±5.03 ±418.40
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.