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.

68.4 (7.5)

5.1 (2.7)

27.8 (16.9)

1925.6 (1892.1)

49.7 (13.5)

145.5 (18.4)

1.5 (0.8)

10.7 (5.3)

0.0

30.1 (7.3)

103.6 (11.2)

8.8 (4.9)

10.6 (10.2)

0.0

41.1 (7.0)

59.1 (6.9)

1.3 (0.9)

5.4 (3.2)

3.3 (3.3)

5.0 (3.5)

94.9 (6.7)

4.9 (1.4)

13.4 (5.2)

473.7 (472.9)

31.6 (4.6)

73.9 (7.8)

0.6 (0.3)

0.8 (0.6)

0.0

25.4 (5.2)

147.6 (12.2)

2.6 (1.0)

18.0 (6.3)

0.0

36.8 (20.6)

81.8 (8.5)

2.2 (1.0)

16.7 (12.2)

0.0

12.4 (4.2)

52.0 (6.9)

1.2 (1.2)

5.1 (3.6)

0.0

0.0

87.0 (5.5)

1.6 (0.5)

9.7 (3.5)

0.0

18.3 (5.1)

2.9 (1.6)

12.9 (3.9)

3.2 (1.5)

0.3 (0.2)

2.9 (0.2)

20.2 (7.6)

4.3 (3.4)

25.3 (9.2)

1.3 (0.8)

13.1 (4.9)

3.5 (1.6)

9.6 (3.1)

2.2 (1.6)

7.1 (2.5)

1.9 (1.2)

3.3 (1.3)

2.3 (0.7)

13.3 (2.6)

3.2 (1.0)

9.6 (2.8)

1.4 (0.6)

16.1 (4.8)

1.0 (0.4)

2.4 (1.1)

1.2 (0.6)

37.5 (10.2)

5.4 (1.7)

16.9 (4.7)

0.6 (0.2)

13.1 (3.9)

1.9 (1.0)

8.7 (1.8)

7.2 (4.7)

8.7 (3.3)

2.2 (0.8)

11.7 (5.6)

2.7 (1.3)

18.5 (3.4)

2.6 (0.6)

9.8 (2.0)