Appendix A. Ecosystem C stocks (Mg C/ha) along the Fossil Ridge elevational climate and species composition gradient.
Plots |
|||||||||||
P1 |
P2 |
P3 |
E1 |
E2 |
E3 |
E4 |
E5 |
S1 |
S2 |
S3 |
|
Aboveground tree biomass |
|||||||||||
Lodgepole pine |
103 |
55 |
58 |
61 |
68 |
92 |
61 |
20 |
0 |
0 |
0 |
Engelmann spruce |
0.22 |
0 |
0 |
24 |
15 |
13 |
54 |
83 |
58 |
97 |
45 |
Subalpine fir |
0.02 |
0 |
0.04 |
1.1 |
1.3 |
1.0 |
1.8 |
1.2 |
17 |
8 |
0 |
Total |
103 |
55 |
58 |
87 |
84 |
106 |
116 |
104 |
75 |
105 |
45 |
Aboveground understory biomass |
|||||||||||
Woody plants 1 |
0.50 |
0.08 |
0.17 |
0.01 |
0.05 |
0.03 |
0.23 |
0.07 |
0.34 |
0.34 |
0.15 |
(0.30) |
(0.06) |
(0.06) |
(0.01) |
(0.02) |
(0.01) |
(0.17) |
(0.03) |
(0.18) |
(0.15) |
(0.05) |
|
Non-woody plants 1 |
0.017 |
0.004 |
0.001 |
0.002 |
0.006 |
0.001 |
0.011 |
0.029 |
0.004 |
0.005 |
0.027 |
(0.005) |
(0.002) |
(0.001) |
(0.001) |
(0.003) |
(0.001) |
(0.003) |
(0.013) |
(0.003) |
(0.005) |
(0.006) |
|
Total |
0.52 |
0.09 |
0.17 |
0.02 |
0.05 |
0.03 |
0.24 |
0.10 |
0.35 |
0.35 |
0.18 |
(0.30) |
(0.06) |
(0.06) |
(0.01) |
(0.03) |
(0.01) |
(0.19) |
(0.03) |
(0.17) |
(0.16) |
(0.04) |
|
Belowground biomass |
|||||||||||
Coarse roots (>2mm) |
5.5 |
4.3 |
5.0 |
20.0 |
4.3 |
5.4 |
18.8 |
8.6 |
9.1 |
12.3 |
9.2 |
(1.1) |
(0.7) |
(3.9) |
(8.7) |
(1.3) |
(1.6) |
(8.9) |
(1.0) |
(2.3) |
(2.6) |
(3.6) |
|
Fine roots (<2 mm) 2 |
1.7 |
2.5 |
2.5 |
2.6 |
2.3 |
3.5 |
2.4 |
2.8 |
4.0 |
3.7 |
1.8 |
(0.4) |
(0.5) |
(0.7) |
(0.4) |
(0.3) |
(0.8) |
(0.6) |
(0.5) |
(0.9) |
(0.6) |
(0.4) |
|
Aboveground necromass |
|||||||||||
Snags 3 |
2.0 |
0.1 |
0.8 |
6.2 |
0.9 |
8.9 |
4.0 |
3.0 |
12.5 |
10.3 |
9.8 |
(0.1) |
(0.0) |
(0.1) |
(0.3) |
(0.1) |
(0.3) |
(0.2) |
(0.2) |
(0.5) |
(0.3) |
(0.5) |
|
CWD (>10 cm) 3 |
3.5 |
6.1 |
8.0 |
1.9 |
1.5 |
1.3 |
0.8 |
0.7 |
6.8 |
10.6 |
17.1 |
(0.1) |
(0.1) |
(0.2) |
(0.1) |
(0.1) |
(0.0) |
(0.0) |
(0.0) |
(0.2) |
(0.2) |
(0.3) |
|
Branches (2.5–10 cm) |
1.18 |
0.26 |
0.33 |
0.50 |
0.06 |
0.14 |
0.19 |
0.01 |
0.15 |
0.63 |
1.21 |
(1.00) |
(0.18) |
(0.17) |
(0.41) |
(0.06) |
(0.10) |
(0.14) |
(0.01) |
(0.09) |
(0.35) |
(0.88) |
|
Forest floor 4 |
22 |
8 |
15 |
15 |
14 |
11 |
8 |
13 |
19 |
17 |
25 |
(4) |
(3) |
(3) |
(2) |
(4) |
(2) |
(3) |
(3) |
(5) |
(3) |
(6) |
|
Mineral soil |
|||||||||||
Topsoil (to 30 cm) |
21 |
19 |
22 |
17 |
26 |
26 |
40 |
40 |
27 |
24 |
31 |
(4) |
(2) |
(5) |
(6) |
(5) |
(3) |
(10) |
(13) |
(13) |
(6) |
(11) |
|
Subsoil (30–60 cm) |
5.5 |
3.0 |
4.8 |
8.6 |
11.9 |
5.0 |
9.0 |
11.9 |
12.1 |
14.0 |
18.6 |
(0.7) |
(0.9) |
(1.3) |
(1.7) |
(1.7) |
(0.9) |
(3.3) |
(1.7) |
(1.2) |
(2.5) |
(3.3) |
|
Total |
27 |
22 |
27 |
26 |
38 |
31 |
48 |
52 |
39 |
38 |
49 |
(4) |
(2) |
(5) |
(6) |
(5) |
(3) |
(9) |
(13) |
(12) |
(6) |
(10) |
|
Ecosystem total |
166 |
98 |
117 |
158 |
145 |
167 |
200 |
184 |
167 |
198 |
159 |
(6) |
(4) |
(7) |
(11) |
(6) |
(4) |
(13) |
(13) |
(14) |
(7) |
(12) |
Notes: All values except those for forest floor and mineral-soil carbon were calculated from mass by assuming all biomass contains 50% C. Standard errors are given in parentheses. The aboveground tree biomass total includes the small amount of aspen biomass in plot P1.
† Woody plants includes shrubs and tree seedlings; non-woody plants includes forbs, graminoids, and moss.
‡ Includes both live and dead fine roots.
§ Error reported is measurement error, not variability among multiple samples (Kueppers et al. 2004).
|| Includes twigs < 2.5 cm diameter.
LITERATURE CITED
Kueppers, L. M., J. Southon, P. Baer, and J. Harte. 2004. Dead wood biomass and turnover time, measured by radiocarbon, along a subalpine elevation gradient. Oecologia 141:641–651.