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Table 3 Surface fuels (mean with standard deviation in parentheses; Mg ha−1 × 102) collected annually from litter baskets and surface plots in old-growth Jeffrey pine-mixed conifer forests in northwestern Mexico. “Other” includes male cones, oak leaves, bark, and cone scales in baskets, and female cones in plots. GRAN = granitic site, META = metamorphic site.

From: Surface fuel accumulation and decomposition in old-growth pine-mixed conifer forests, northwestern Mexico

Type Site Year Litter 1-hour 10-hour 100-hour Other
Basket GRAN 2010 68.4 (7.5) 5.1 (2.7) 27.8 (16.9) 1925.6 (1892.1) 49.7 (13.5)
2011 145.5 (18.4) 1.5 (0.8) 10.7 (5.3) 0.0 30.1 (7.3)
2012 103.6 (11.2) 8.8 (4.9) 10.6 (10.2) 0.0 41.1 (7.0)
2013 59.1 (6.9) 1.3 (0.9) 5.4 (3.2) 3.3 (3.3) 5.0 (3.5)
Annual rate 94.9 (6.7) 4.9 (1.4) 13.4 (5.2) 473.7 (472.9) 31.6 (4.6)
Basket META 2010 73.9 (7.8) 0.6 (0.3) 0.8 (0.6) 0.0 25.4 (5.2)
2011 147.6 (12.2) 2.6 (1.0) 18.0 (6.3) 0.0 36.8 (20.6)
2012 81.8 (8.5) 2.2 (1.0) 16.7 (12.2) 0.0 12.4 (4.2)
2013 52.0 (6.9) 1.2 (1.2) 5.1 (3.6) 0.0 0.0
Annual rate 87.0 (5.5) 1.6 (0.5) 9.7 (3.5) 0.0 18.3 (5.1)
Plot GRAN 2010   2.9 (1.6) 12.9 (3.9) 3.2 (1.5) 0.3 (0.2)
2011   2.9 (0.2) 20.2 (7.6) 4.3 (3.4) 25.3 (9.2)
2012   1.3 (0.8) 13.1 (4.9) 3.5 (1.6) 9.6 (3.1)
2013   2.2 (1.6) 7.1 (2.5) 1.9 (1.2) 3.3 (1.3)
Annual rate   2.3 (0.7) 13.3 (2.6) 3.2 (1.0) 9.6 (2.8)
Plot META 2010   1.4 (0.6) 16.1 (4.8) 1.0 (0.4) 2.4 (1.1)
2011   1.2 (0.6) 37.5 (10.2) 5.4 (1.7) 16.9 (4.7)
2012   0.6 (0.2) 13.1 (3.9) 1.9 (1.0) 8.7 (1.8)
2013   7.2 (4.7) 8.7 (3.3) 2.2 (0.8) 11.7 (5.6)
Annual rate   2.7 (1.3) 18.5 (3.4) 2.6 (0.6) 9.8 (2.0)