Table 9.0a. Relative standard errors (%) of area of forest land by IUCN1 category and age class in Canada.
IUCN category Age (years) Total
1-20 21-40 41-60 61-80 81-100 101-120 121-140 141-160 161-180 181-200 201+ Other2
NA 2.38 1.83 1.63 1.49 1.48 1.58 1.77 2.61 4.79 6.18 3.38 2.66 0.59
IA 41.65 58.12 37.88 34.60 35.87 52.06 57.83 95.07 75.05 - 77.19 99.64 18.42
IB 21.24 14.32 11.31 9.88 11.02 12.10 11.47 23.82 30.34 34.59 16.77 21.88 4.26
II 18.46 8.94 7.13 6.36 6.33 7.30 7.20 11.32 13.94 15.68 8.98 15.97 2.58
III 82.18 53.76 38.51 50.02 55.64 62.94 51.29 - 99.98 - 69.82 98.45 21.75
IV 30.04 19.73 22.01 20.90 14.94 32.55 19.39 46.43 58.79 100.00 53.65 66.67 8.68
V 100.00 - 100.00 100.00 - 100.00 100.00 - - - - - 54.21
VI 88.57 76.31 55.48 52.75 41.80 38.97 100.00 100.00 - - - 88.60 24.51
OTHER 46.77 28.00 22.53 24.12 24.88 14.14 21.39 68.35 - 100.00 - 92.61 8.45
Subtotal 2.34 1.78 1.57 1.43 1.43 1.53 1.69 2.54 4.48 5.67 3.14 2.61 0.57
Source: Canada's National Forest Inventory, combined remeasured (2007-2017) and projected (2006-2017 with NFI projection system) data< (Version 3, November 2023) (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 IUCN: International Union for Conservation of Nature (http://www.iucn.org). Data obtained from the Canadian Protected and Conserved Areas Database (CPCAD) (https://www.canada.ca/en/environment-climate-change/services/national-wildlife-areas/protected-conserved-areas-database.html).
2 Missing or unknown age class.
International Union for Conservation of Nature (IUCN) category
IUCN Category Description
NA Not protected
Ia Protected area managed mainly for science
Ib Protected area managed mainly for wilderness protection
II Protected area managed mainly for ecosystem protection and recreation
III Protected area managed mainly for conservation of specific natural features
IV Protected area managed mainly for conservation through management intervention
V Protected area managed mainly for landscape/seascape protection and recreation
VI Protected area managed mainly for the sustainable use of natural resources
Other Protected with missing or unknown category