Table 9.1a. Relative standard errors (%) of area of forest land by IUCN1 category, age class and terrestrial ecozone in Canada.
Terrestrial ecozone IUCN category Age (years)
1-20 21-40 41-60 61-80 81-100 101-120 121-140 141-160 161-180 181-200 201+ Other2
Taiga Plains NA 12.6 9.2 6.9 5.2 4.4 3.4 8.4 12.6 16.7 39.1 39.1 21.1
Ib 47.6 42.3 36.9 25.7 26.6 20.1 82.3 100.4 84.0 100.4 100.3 0.0
II 73.9 48.8 28.5 21.5 18.9 13.9 51.0 53.6 90.1 100.0 0.0 0.0
VI 99.6 81.8 62.9 64.9 42.4 39.0 100.0 100.0 0.0 0.0 0.0 0.0
Taiga Shield NA 13.2 8.9 6.9 7.1 5.1 4.5 3.2 5.6 41.8 57.1 20.3 5.1
Ib 66.5 55.8 37.4 41.1 67.3 53.9 18.6 0.0 0.0 0.0 0.0 26.3
II 100.1 44.4 28.2 30.0 22.0 17.6 14.5 29.5 0.0 0.0 0.0 15.8
Boreal Shield NA 3.5 2.8 2.3 2.3 2.1 3.7 3.5 8.4 17.2 36.8 54.7 4.2
Ia 100.0 59.1 51.8 48.9 54.8 100.0 81.5 100.0 0.0 0.0 0.0 13.4
Ib 29.5 22.6 18.3 14.9 18.0 24.8 23.8 49.7 78.4 89.9 0.0 41.0
II 22.2 11.6 10.1 9.7 10.0 15.5 14.7 29.7 59.8 59.3 100.0 35.2
III 0.0 73.5 74.2 89.5 60.3 0.0 100.0 0.0 0.0 0.0 0.0 0.0
IV 35.2 27.1 29.4 29.8 16.7 46.8 23.7 68.5 0.0 0.0 0.0 96.1
VI 99.7 83.1 72.1 87.0 100.0 0.0 0.0 0.0 0.0 0.0 0.0 100.0
Other 60.3 33.6 31.3 34.4 35.0 44.2 45.9 87.4 0.0 0.0 0.0 95.0
Atlantic Maritime NA 5.3 4.7 4.4 4.2 5.5 9.9 23.3 27.2 75.5 98.7 100.0 7.0
Ia 50.7 73.7 61.3 72.3 64.9 65.5 100.0 0.0 0.0 0.0 0.0 100.0
Ib 83.0 57.3 42.0 33.1 49.1 58.7 0.0 0.0 0.0 0.0 0.0 69.6
II 44.0 36.5 33.5 25.7 29.4 46.9 58.0 70.7 0.0 0.0 0.0 99.8
III 100.4 94.3 100.4 100.4 0.0 100.0 0.0 0.0 0.0 0.0 0.0 0.0
IV 99.8 65.9 44.2 61.8 76.5 100.0 0.0 100.0 0.0 0.0 0.0 58.1
VI 100.0 75.2 94.9 100.0 99.3 100.0 0.0 0.0 0.0 0.0 0.0 100.0
Other 0.0 100.0 0.0 85.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Mixedwood Plains NA 13.7 10.2 6.8 8.0 10.8 32.8 32.8 51.2 100.0 0.0 0.0 16.4
Ia 100.0 100.0 87.5 84.0 99.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0
II 71.9 77.5 50.7 72.6 66.0 86.9 70.9 100.0 0.0 0.0 0.0 0.0
III 0.0 0.0 0.0 100.2 0.0 100.2 0.0 0.0 0.0 0.0 0.0 0.0
IV 100.1 0.0 71.7 100.8 94.9 0.0 100.0 0.0 0.0 0.0 0.0 100.1
VI 100.1 0.0 100.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Boreal Plains NA 6.9 5.5 4.7 3.4 3.8 4.6 5.9 9.3 16.1 31.9 45.7 8.5
Ia 0.0 86.4 65.3 66.4 74.8 78.5 84.3 0.0 0.0 0.0 0.0 0.0
Ib 69.1 41.7 36.9 28.7 27.9 41.3 43.0 78.3 78.1 0.0 100.0 100.0
II 44.1 20.4 16.7 12.8 12.8 21.5 29.7 36.2 45.2 59.4 96.7 100.0
III 0.0 66.3 63.9 55.1 80.6 100.0 96.0 0.0 0.0 0.0 0.0 0.0
IV 55.6 47.0 71.9 54.9 62.9 71.5 100.0 100.0 0.0 0.0 0.0 46.9
V 100.0 0.0 95.0 64.9 73.7 94.3 100.0 0.0 0.0 0.0 0.0 0.0
VI 8.2 67.9 99.4 97.7 87.2 100.0 100.0 0.0 100.0 100.0 0.0 4.8
Other 100.0 100.0 70.5 61.1 60.8 69.8 94.9 100.0 0.0 100.0 0.0 0.0
Prairies NA 13.0 10.8 18.2 26.6 41.6 62.3 100.0 87.7 0.0 0.0 0.0 29.1
Ib 100.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
II 56.8 55.4 73.6 74.8 76.0 100.0 100.0 0.0 0.0 0.0 0.0 0.0
III 100.0 100.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 88.4
IV 47.2 50.2 61.3 100.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 100.0
V 78.9 100.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.7
VI 38.0 99.9 100.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0
Other 0.0 0.0 100.0 100.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 100.0
Taiga Cordillera NA 78.9 25.8 17.6 13.6 14.2 10.9 8.3 33.3 44.1 0.0 0.0 70.1
Ib 0.0 100.0 95.8 71.2 64.1 62.8 41.7 0.0 0.0 0.0 0.0 0.0
II 0.0 100.0 55.0 61.9 34.4 58.7 27.4 0.0 0.0 0.0 0.0 0.0
III 0.0 0.0 0.0 0.0 100.0 0.0 100.0 0.0 0.0 0.0 0.0 0.0
IV 0.0 100.0 75.4 69.7 0.0 71.4 74.4 0.0 0.0 0.0 0.0 0.0
Boreal Cordillera NA 23.4 15.0 8.6 8.2 7.1 6.6 8.8 9.8 13.3 19.3 12.5 24.7
Ib 97.7 80.4 48.6 33.2 43.0 36.8 33.2 34.8 27.8 72.9 19.8 0.0
II 0.0 52.2 51.6 38.8 31.7 27.1 27.6 48.6 59.2 98.7 46.1 0.0
IV 0.0 0.0 100.0 67.4 93.6 73.0 55.9 89.8 100.0 0.0 0.0 0.0
Pacific Maritime NA 13.4 11.9 12.7 15.0 14.7 16.3 15.5 15.8 13.3 17.0 5.5 13.9
Ia 0.0 0.0 0.0 100.1 0.0 0.0 100.1 0.0 100.1 0.0 80.9 0.0
Ib 0.0 0.0 100.0 84.0 76.5 71.2 58.5 90.9 66.8 99.2 38.6 100.0
II 71.8 58.1 39.2 36.9 38.2 39.1 35.2 43.6 36.8 24.9 12.7 91.2
III 0.0 0.0 100.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 100.0 0.0
IV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.2 0.0
V 0.0 0.0 0.0 0.0 11.2 0.0 0.0 5.0 5.0 0.0 27.6 0.0
Montane Cordillera NA 7.8 7.5 10.8 8.2 6.0 5.5 5.1 5.5 6.7 8.0 5.4 8.1
Ia 20.3 100.0 0.0 0.0 0.0 77.7 84.1 99.2 100.0 0.0 0.0 0.0
Ib 100.2 66.5 40.8 31.0 25.5 26.2 20.8 32.0 34.2 48.5 23.3 0.0
II 70.1 65.9 35.8 22.7 18.2 17.9 15.3 15.8 18.7 19.1 15.6 99.3
III 100.0 100.0 0.0 100.0 100.0 70.9 100.0 0.0 0.0 0.0 100.0 0.0
IV 0.0 100.0 0.0 100.0 100.0 0.0 100.0 100.0 100.0 0.0 100.0 0.0
VI 0.0 0.0 0.0 100.0 100.0 100.0 100.0 0.0 0.0 0.0 0.0 0.0
Other 99.9 99.9 99.9 99.9 81.4 99.9 0.0 0.0 0.0 0.0 0.0 0.0
Hudson Plains NA 31.3 10.5 8.3 9.8 5.8 7.9 9.0 25.4 66.6 100.0 0.0 17.2
Ib 83.6 44.3 36.7 49.8 28.7 46.0 57.5 100.0 0.0 0.0 0.0 100.0
II 61.3 88.9 40.5 41.5 48.6 92.0 30.6 100.0 100.1 0.0 0.0 55.1
IV 0.0 0.0 0.0 0.0 100.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Canada NA 2.4 1.9 1.6 1.5 1.4 1.7 1.8 3.1 5.0 6.5 3.6 2.6
Ia 44.3 58.4 38.7 36.7 36.7 53.2 58.3 95.1 77.5 0.0 80.9 95.0
Ib 22.7 15.8 11.7 9.9 10.4 11.5 11.4 20.9 21.0 42.0 14.0 21.5
II 17.0 8.8 7.3 6.4 6.1 7.2 7.6 11.4 15.4 14.8 9.7 15.3
III 82.9 55.4 43.1 53.1 48.3 64.0 69.6 0.0 0.0 0.0 84.9 88.4
IV 29.2 20.2 23.2 22.8 15.9 44.9 20.7 56.6 71.2 0.0 100.0 87.2
V 62.1 100.0 95.0 64.9 73.7 94.3 100.0 5.0 5.0 0.0 27.6 4.7
VI 88.6 68.5 54.7 48.5 35.4 37.3 79.1 100.0 100.0 100.0 0.0 88.6
Other 52.3 32.3 28.1 28.7 30.2 36.4 42.2 68.3 0.0 100.0 0.0 99.5
Source: Canada's National Forest Inventory, combined remeasured (2007-2017) and projected (2006-2017 with NFI projection system) data (Version 1, July 2021) (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