Ecological Archives E095-030-A3
Adam F. A. Pellegrini, William A. Hoffmann, Augusto C. Franco. 2014. Carbon accumulation and nitrogen pool recovery during transitions from savanna to forest in central Brazil. Ecology 95:342–352. http://dx.doi.org/10.1890/13-0290.1
Appendix C. Summary tables and statistical analyses of ecosystem C and N stocks.
Table C1. Total ecosystem carbon stocks. Carbon stocks in the woody vegetation (AG = aboveground; BG = belowground) were calculated using allometry defined in text and using %C measured in leaves (averaged across the four species collected) and wood. All other C calculations are discussed in text.
Plot
Total C (Mg/ha)
Woody AG
Woody BG
Herb
Litter
Top
Middle
Total
1
2.3
1.0
2.2
0.3
14.6
22.2
42.7
2
2.5
1.1
0.5
0.5
16.5
24.7
45.8
3
9.8
3.7
0.3
2.3
21.3
27.1
64.6
4
14.8
5.4
0.6
1.7
18.1
23.7
64.3
5
15.6
5.6
0.005
1.9
16.1
29.9
69.2
6
21.8
7.6
0.09
5.7
28.3
33.3
96.7
7
84.5
25.4
0.004
7.6
31.0
30.8
179.2
Table C2. Total ecosystem nitrogen stocks. Nitrogen stocks in the woody vegetation (AG = aboveground; BG = belowground) were calculated using allometry defined in text and using %N measured in leaves (averaged across the four species collected) and wood (used for wood and belowground biomass). All other N calculations are discussed in text.
Plot
Total N (kg·N·ha-1)
Woody AG
Woody BG
Herb
Litter
Top
Middle
Total
1
34.0
7.8
120.0
3.1
821
986
1972
2
37.3
8.4
29.0
6.4
748
1132
1961
3
143.4
27.9
17.0
32.5
913
1314
2447
4
210.6
39.3
32.0
29.8
803
1168
2283
5
222.8
41.4
0.27
30.6
858
1570
2722
6
302.9
56.8
4.64
135.5
1332
1643
3475
7
1281.3
205.1
0.216
152.4
1424
1460
4523
Table C3. Concentrations of C and N (both in mg g-soil-1) at three depths in the deeper soil layers across the woody biomass gradient in biogeochemical pools.
Plot
Biomass (Mg/ha)
25 cm
50 cm
100 cm
C
N
C
N
C
N
1
6.7
21.8
1.1
12.2
0.7
9.4
0.5
2
7.1
20.2
1.2
11.7
0.6
8.9
0.5
3
27.1
24.3
1.5
15.8
0.8
11.4
0.5
4
40.4
18.1
1.1
13.6
0.7
9.8
0.5
5
42.6
18.1
1.1
13.9
0.9
9.4
0.5
6
58.7
20.8
1.3
14.7
0.8
9.6
0.5
7
219.6
17.3
1.1
11.6
0.6
8.7
0.4
Table C4. Statistics on the concentrations of C and N across the woody biomass gradient (AGBM is aboveground woody biomass).
Model
25 cm
50 cm
100 cm
R²
F
p
R²
F
p
R²
F
p
mg C g-soil-1 ~ AGBM
0.16
2.20
0.2
<0
0.57
0.48
<0
0.94
0.38
mg N g-soil-1 ~ AGBM
<0
0.33
0.59
<0
0.68
0.45
0.39
4.94
0.08
Table C5. Concentrations of C, N, and C:N ratios across the woody biomass gradient in biogeochemical pools.
Plot
Biomass (Mg/ha)
mg C g-sample-1
mg N g-sample-1
C:N
Litter
Top
Middle
Litter
Top
Middle
Litter
Top
Middle
1
6.7
466
40
31
5.5
2.3
1.4
85.5
18.3
22.6
2
7.1
458
45
34
5.6
2.1
1.6
82.6
22.1
21.8
3
27.1
461
58
37
6.5
2.5
1.8
74.6
23.4
20.7
4
40.4
414
50
33
7.8
2.2
1.6
57.5
22.5
20.3
5
42.6
457
44
41
7.4
2.4
2.2
62.2
18.8
19.0
6
58.7
480
78
46
11.4
3.7
2.3
42.3
21.3
20.3
7
219.6
436
85
42
8.8
3.9
2.0
51.5
22.1
21.2
Table C6. Inorganic N concentrations across the woody biomass gradient in litter and upper soil layers.
Plot
Biomass (Mg/ha)
NH4+-N
(μg g-sample-1)
NO3--N
(μg g-sample-1)
Total Inorganic N
(μg g-sample-1)Litter
Top
Middle
Litter
Top
Middle
Litter
Top
Middle
Total
1
6.7
5.25
2.19
2.55
0.69
0.16
0.13
5.94
2.35
2.69
10.97
2
7.1
1.36
2.95
2.39
0.87
0.38
0.55
2.23
3.34
2.94
8.50
3
27.1
9.27
3.01
2.99
1.01
0.29
0.53
10.28
3.30
3.52
17.09
4
40.4
11.43
5.36
3.18
0.84
1.04
0.67
12.28
6.40
3.85
22.53
5
42.6
9.19
3.12
2.61
1.27
1.07
0.85
10.46
4.19
3.46
18.11
6
58.7
35.15
11.64
4.93
3.03
0.57
0.38
38.18
12.21
5.31
55.70
7
219.6
9.45
6.44
5.37
1.73
0.62
0.49
11.18
7.06
5.86
24.10
Fig. C1. Changes in soil C (A) and N (B) concentrations across the gradient in woody biomass.