Statistical data

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Disturbance (Quebec)
	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)		6,246,502	4,891,885	5,551,793	5,317,954	4,733,185	4,852,264	3,397,662	2,639,219	1,545,350	1,071,570	577,763	265,121	106,033	77,575	129,976	143,181	31,082	102,372	280,983	1,080,539	1,361,544	585,132	34,198	32,280	12,718	7,531	10,348	57,532	81,418	336,043	989,854
Balsam fir sawfly																											263	488	294
Forest tent caterpillar				118,491	212,069	68,527	20,968	918				4,201	3,542						100,000	233,605	994,394	472,095	94,556			512	1,017	3,567	39,861	37,024	14,000	92,090
Gypsy moth														3							2	2		10		20				216	6,000	6,075
Jack pine budworm																71	562	151								176	1,193	341	244	592
Mountain pine beetle
Spruce beetle																	26,218				1,000				15,000			5
Spruce budworm		6,246,502	4,891,885	5,433,302	5,105,885	4,664,658	4,824,947	3,381,829	2,621,520	1,537,562	1,057,677	560,642	253,496	106,030	77,575	39,687	39,603	30,895	2,261	3,144	18,225	8,039	20,334	9,497	4,362	4,571	4,383	1,976	374	20,733	290,863	871,854
Western spruce budworm
Other insects							6,349	14,915	17,699	7,788	13,893	12,920	8,083			90,218	76,798	36	111	44,234	66,918	881,408	470,242	24,691	12,918	7,439	675	3,971	16,759	22,853	25,180	19,835
Fires ^{Footnote 2}
Area burned (hectares)	49,748	60,001	9,693	86,316	38,445	33,933	6,158	63,903	1,872,842	64,044	12,399	314,914	94,001	1,597	342,715	136,353	800,140	3,058	88,245	1,013,750	33,092	39,208	97,747	418,307	393,079	691,590	727,727	116,040	128,234	27,112	438,331	83,343
Number of fires	625	712	362	597	322	607	392	296	528	798	331	740	485	223	939	684	1,375	322	720	899	1,005	517	1,037	854	876	1,250	1,265	499	543	765	1,216	851

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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.

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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.

Return to footnote 2 TEXT-REFERRER

Statistical data

Disturbance (Quebec)