Table 16C.0a. Relative standard errors (%) for annual change in total tree volume 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
Unspecified conifers 12.03 50.43 25.85 37.49 29.18 - - - - - - 0.00 11.60
Unclassified 15.52 22.90 65.54 69.30 97.38 100.57 100.04 - - - - 7.00 13.91
Pine 14.44 9.33 16.76 11.36 12.72 18.14 22.67 76.68 50.82 54.27 45.32 0.00 6.17
Unspecified hardwoods 31.69 20.89 19.12 51.21 23.54 72.51 100.00 - - - - 0.00 13.21
Other hardwoods 12.88 17.85 41.19 30.79 18.32 38.88 41.38 51.39 63.83 95.31 43.99 0.00 11.13
Birch 19.01 16.71 15.01 12.71 18.48 17.45 16.91 39.21 46.28 54.25 64.44 0.00 6.51
Spruce 15.81 9.74 6.64 6.35 2.12 1.97 2.35 5.50 26.96 26.15 38.52 0.00 1.20
Maple 50.58 16.16 10.81 10.98 23.73 14.05 20.63 28.92 200.0* 100.00 68.86 0.00 6.10
Cedar & other conifers 59.45 25.26 42.22 29.08 49.42 42.23 47.50 46.06 71.76 79.35 22.91 - 14.43
Poplar 10.10 11.64 7.52 5.67 6.24 13.09 16.83 18.54 39.73 51.07 41.92 0.00 3.24
Larch 31.96 11.01 11.75 11.43 19.29 25.17 23.56 34.47 29.02 79.74 59.27 0.00 6.69
Douglas-fir 48.65 69.54 122.40 51.50 100.20 59.65 47.03 21.40 73.60 71.31 43.61 - 17.86
Hemlock 33.40 112.44 39.17 167.15 43.06 53.89 62.39 200.0* 46.06 186.54 17.29 - 13.81
Fir 21.61 9.75 10.40 12.65 11.40 20.72 20.08 22.93 25.67 200.0* 26.51 0.00 5.86
Total 5.27 4.64 4.03 3.50 2.05 2.03 2.58 5.68 15.56 21.09 11.00 7.00 1.11
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.