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Table 3 Species composition as a percent of total basal area (m2ha−1), and trees per hectare for stands in northern New Mexico under western spruce budworm pre-outbreak and outbreak conditions. Pre-out-break data shown using Forest Vegetation Simulator outputs from stands grown from stand inventory data to 2013. Outbreak stand values as reported in Polinko (2014) and calculated using 2013 outbreak stand data. Standard deviation shown in parentheses. Different letters indicate significant differences between pre-outbreak and outbreak stands using Wilcoxon rank sign test (α < 0.05); no letters indicate no significant differences between stands. ABLAA = Abies lasiocarpa var. arizonica, PIEN = Picea engelmannii, POTR = Populous tremuloides, PSME = Pseudotsuga menziesii, JUSP = Juniperus spp., PIAR = Pinus aristata, PIFL = Pinus flexilis, ABCO = Abies concolor. ABCO, JUSP, PIAR, and PIFL were not included in statistical comparisons due to their presence in only <3 stands.

From: The Influence of Western Spruce Budworm on Fire in Spruce-Fir Forests

Percent total live basal area by species
Stand Type ABLAA PIEN POTR PSME JUSP PIAR PIFL ABCO
Pre-outbreak 48.92a 38.99a 4.25a 8.19a 0.0 0.11 0.0 0.0
(n = 6) (6.2) (9.5) (7.9) (10.9) (0.0) (0.1) (0.0) (0.0)
Outbreak 10.22b 48.29a 14.07a 25.09a 0.0 0.0 1.85 0.47
(n = 4) (8.3) (32.4) (8.6) (40.5) (0.0) (0.0) (2.4) (9.4)
Percent total live trees per hectare by species
Stand type ABLAA PIEN POTR PSME JUSP PIAR PIFL ABCO
Pre-outbreak 4.65a 3.78a 18.3a 0.1a 0.0 0.0 0.0 0.0
(n = 6) (3.9) (1.6) (19.4) (0.1) (0.0) (0.0) (0.0) (0.0)
Outbreak 42.02a 48.02a 33.53b 7.56a 50 25 0.0 37.5
(n = 4) (38.4) (34.9) (16.1) (9.2) (57.7) (50.0) (0.0) (47.9)