Table 14C.0a. Relative standard errors (%) for annual change in area of forest land by species group and age class in Canada.
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
Unclassified 14.76 22.28 60.94 66.37 94.45 100.57 100.04 - - - - 8.16 7.25
Unspecified conifers 16.50 63.64 40.66 35.73 28.51 - - - - - - 60.41 15.62
Poplar 9.59 7.96 6.69 5.43 5.49 9.66 18.51 20.00 36.09 56.78 83.44 74.74 2.76
Birch 13.16 10.12 13.63 11.35 18.59 18.85 20.16 46.79 49.05 52.03 62.99 62.51 5.36
Other hardwoods 9.83 12.47 40.82 25.00 19.60 50.80 50.36 63.33 57.31 85.33 37.67 72.68 8.11
Spruce 10.06 6.06 4.36 4.70 2.10 1.96 1.89 3.58 21.34 23.36 18.71 28.64 1.03
Cedar & other conifers 43.80 22.86 31.22 27.91 45.30 40.93 55.44 31.20 66.63 68.24 36.72 - 12.19
Hemlock 59.28 56.33 47.41 65.98 31.60 49.62 65.69 173.42 46.49 118.51 26.20 - 15.18
Unspecified hardwoods 49.17 18.43 18.33 47.71 23.17 73.34 100.00 - - - - 100.51 19.52
Douglas-fir 44.94 31.58 180.43 29.99 107.38 63.81 55.71 20.21 72.84 45.77 35.57 - 14.36
Maple 14.40 12.28 8.92 10.30 20.55 14.40 19.95 29.23 200.0* 100.00 63.41 100.51 5.08
Larch 12.03 11.93 12.40 13.63 15.88 16.40 18.16 24.91 33.00 43.23 44.24 53.14 5.13
Pine 19.97 7.00 11.13 11.77 11.21 15.23 21.50 64.57 35.03 85.27 53.77 70.12 4.49
Fir 15.09 9.53 10.42 11.92 14.42 17.88 18.62 21.49 26.36 191.19 39.15 45.71 4.99
Total 4.85 3.28 2.97 2.96 1.89 1.87 1.87 3.53 12.93 20.71 12.32 7.94 0.88
Source: Canada's National Forest Inventory, combined remeasured (2007-2017) and projected (2006-2017 with NFI projection system) data, where plots with strong indicators of artificial change are removed. Artificial change between successive plot measurements can be caused by using different image sources, incorporating vintage baseline inventories, and updating photo-interpretation techniques (Version 3.1, November 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.
* When the calculated RSE value is inflated, usually due to the associated change estimate being small (near 0), a cap of 200% is substituted for presentation purposes.