Patterns of woodboring beetle activity following fires and bark beetle outbreaks in montane forests of California, USA

Fire Ecology

Table 10 Fixed effects and associated hypotheses (H_A from Table 5) in top models of adult cerambycid activity across 11 burned sites sampled in the greater Sierra Nevada region of California, USA, during the summers of 2015 and 2016. QAICc = quasi-Akaike’s information criterion, corrected for small sample size; DOY = day of year; Neg = negative; Pos = positive; BA = basal area

Response	Model rank	Predictor	Effect^a	ΔQAICc	Δ_Null	H_A
Adult cerambycid activity	1	Null		0.00	0.00
Adult Xylotrechus longitarsus activity	1	Fire age	Neg^**	0.00	4.66	A
		Elevation	Pos^***			G
		Ignition date	Neg^ns			P
	2	Elevation	Pos^***	0.02	4.64	G
	3	Host tree taxon = fir	Pos^**	0.76	3.90	H
	4	Elevation	Pos^***	2.04	2.62	G
	4	Elevation²	Pos^ns	2.04	2.62	G
	5	Snag BA	Pos^***	2.68	1.98	M, S
Adult Monochamus species activity	1	Fire age	Neg^*	0.00	9.06	A
		Burn severity = low	Pos^**			S
		Burn severity = moderate	Pos^***			S
	2	Burn severity = low	Pos^**	1.35	7.71	S
	2	Burn severity = moderate	Pos^***	1.35	7.71	S
	3	Ignition date (DOY)	Neg^ns	1.56	7.50	P
		DOY × DOY	Neg^ns			P
		Fire age	Neg^***			A
		DOY × DOY × Fire age	Pos^***			P, A
	4	Needles retained	Pos^***	2.64	6.42	A
	5	Fire age	Neg^*	3.16	5.90	A
		Burn severity = low	Pos^**			S
		Burn severity = moderate	Pos^***			S
		Ignition date (DOY)	Neg^ns			P
		DOY × DOY	Neg^ns			P