Statistical data

1. Select area

2. Select year

Disturbance (Nova Scotia)
	2021	2020	2019	2018	2017	2016	2015	2014	2013	2012	2011	2010	2009	2008	2007	2006	2005	2004	2003	2002	2001	2000	1999	1998	1997	1996	1995	1994	1993	1992	1991	1990
Insects ^{Footnote 1}
Area defoliated by insects and containing beetle-killed trees (hectares)		18,757	18,757	698	4,753			533						13,914	20,000	20,064	1,680	578	17,561	17,520			49,866	75,000		12,226	14,288	210	25,042	3,630	4,650
Balsam fir sawfly																											250
Forest tent caterpillar																										1,294	9,557
Gypsy moth																				13
Jack pine budworm														381		64	360
Mountain pine beetle
Spruce beetle		30	30	7	1,860			533						13,433	20,000	20,000			17,000	17,000				15,000
Spruce budworm
Western spruce budworm
Other insects		18,727	18,727	691	2,893									100			1,320	578	561	507			49,866	60,000		10,932	4,481	210	25,042	3,630	4,650
Fires ^{Footnote 2}
Area burned (hectares)	197	697	137	198	573	807	551	565	307	364	150	438	916	2,700	691	2,046	495	290	1,257	213	530	488	1,823	397	565	639	405	242	368	1,160	1,776	1,068
Number of fires	113	178	143	196	177	271	249	172	174	353	114	250	191	248	387	216	289	259	272	270	489	212	464	346	370	270	407	263	302	296	726	497

Footnotes

Footnote 1

Insects

Source: National Forestry Database. Forest insects – Forest insects, Table 4 Area of moderate to severe defoliation (including beetle-killed trees) by insects. (accessed June 21, 2022).

Notes:

Forest area disturbed by defoliators (e.g., budworms, Lymantria dispar) includes only areas with tree mortality or moderate to severe defoliation. Defoliation does not always result in mortality. Several factors, including defoliation severity, duration, and frequency, or presence of other stressors (e.g., drought), can affect the level of mortality.
Forest area disturbed by bark beetles (e.g., mountain pine beetle, spruce beetle) is derived from aerial surveys that map trees that are dead or dying from successful beetle attack.
Summing the areas affected by more than one insect to create a grand total can result in an overestimate if more than one insect species occurs in the same stand in the same year. For example, in a mixedwood forest, spruce budworm may defoliate balsam fir in the same stand where forest tent caterpillar is defoliating the aspen trees.

Footnote 2

Fires

Sources:

National Forestry Database. Forest fires, Table 3.1.1, Number of fires by cause class. (accessed June 21, 2022).
National Forestry Database. Forest fires, Table 3.2.1, Area burned by cause class. (accessed June 21, 2022).

Note:

The National Forestry Database sources the latest year’s fire data from the Canadian Interagency Forest Fire Centre and all years prior from the Canadian Wildland Fire Information System.