Ecological Archives E086-097-A2

Susan E. Crow and R. Kelman Wieder. 2005. Sources of CO2 emission from a northern peatland: root respiration, exudation, and decomposition. Ecology 86:1825–1834.

Appendix B. Tables for biomass and 14C allocation in all above- and belowground pools.

TABLE B1. Mean biomass (g/m2) ± standard error of the various vegetation/peat/root categories for the eight cores in each vegetation treatment group. 

Vegetation/peat category
Depth
Vegetation treatment
   
Mosses only
Sedges + mosses
Sedges only
Shrubs + mosses
Shrubs only

Leaves

 

-

-

-

39.2 ± 0.2a

28.1 ± 8.8a

Stems

 

-

-

-

112 ± 25a

147 ± 39a

Sedges

 

-

479 ± 86a

397 ± 102a

-

-

Mosses

0–2 cm

622 ± 62z

452 ± 31z

-

679 ± 113z

-

Fine roots (<2mm)      

0–2 cm

1.4 ± 0.7z

1.3 ± 0.5z

4.9 ± 1.2yz

3.8 ± 1.7yz

8.0 ± 2.3y

2–7 cm

19.4 ± 4.3d

52.6 ± 12.9cd

67.4 ± 7.0b-d

56.1 ± 5.5cd

79.9 ± 17.9a-d

7–12 cm

31.7 ± 3.8cd

149 ± 16ab

117 ± 18a-c

77.6 ± 17.3a-d

72.2 ± 9.6b-d

12–17 cm

48.4 ± 8.5cd

165 ± 35a

94.7 ± 19.9a-d

90.2 ± 24.0 a-d

70.3 ± 6.6b-d

17–22 cm

59.5 ± 8.2b-d

113 ± 35a-c

59.3 ± 14.2cd

65.6 ± 14.2b-d

101 ± 24a-d

Small roots (>2mm)      

0–2 cm

0 ± 0z

0 ± 0z

0 ± 0z

0 ± 0z

0 ± 0z

2–7 cmb

7.9 ± 5.2

13.3 ± 5.9

46.8 ± 20.9

70.7 ± 18.9

65.4 ± 22.2

7–12 cma

53.8 ± 21.3

63.8 ± 17.8

116 ± 29

137 ± 32

140 ± 42

12–17 cma

99.2 ± 20.6

114 ± 35

92.9 ± 19.3

130 ± 32

101 ± 51

17–22 cma

160 ± 44

85.1 ± 31.6

75.6 ± 17.0

88.8 ± 12.0

103 ± 28

Peat        

0–2 cm

-

-

540 ± 47z

-

436 ± 48z

2–7 cm

1571 ± 136g

2014 ± 165fg

2173 ± 119e-g

2218 ± 157e-g

2566 ± 167b-g

7–12 cm

2397 ± 98d-g

2536 ± 129fg

2852 ± 163b-f

2836 ± 112b-f

1628 ± 127g

12–17 cm

3175 ±125a-e

3186 ± 92a-e

3630 ± 210ab

3543 ± 132a-c

2972 ± 141b-f

17–22 cm

4100 ± 360a

3492 ± 315a-c

2961 ± 448b-f

3336 ± 141a-d

2898 ± 393b-f

Aboveground

 

622 ± 62ab

931 ± 92a

397 ±102bc

831 ± 144a

175 ± 45c

Belowground

 

11725 ± 421a

11524 ± 627a

12446 ± 464a

12217 ± 624a

10852 ± 684a

Total

 

12347 ± 464a

12454 ± 694a

12843 ± 495a

13048 ± 652a

11027 ± 705a

   Notes: For all categories except small roots, values with the same letter superscript do not differ significantly; for small roots, depths with the same letter superscript do not differ significantly (one-way ANOVA for leaves, stems, sedges, each vegetation/peat category in the 0–2 cm section, aboveground, belowground and total biomass; two-way ANOVA for fine roots, small roots and mosses/peat, Bonferroni a posteriori comparisons to maintain an experimentwise error rate, a, of 0.05).


 

TABLE B2.  Mean 14C activity (Bq/g; means ± standard error, n = 8) and small:fine root activity ratio by vegetation/peat/root category in each vegetation treatment group.   

Vegetation/peat category
Depth
Vegetation treatment
   
Mosses only
Sedges + mosses
Sedges only
Shrubs + mosses
Shrubs only

Leaves

 

-

-

-

1749 ± 602a

1444 ± 522a

Stems

 

-

-

-

218 ± 76a

158 ± 66a

Sedges

 

-

180 ± 73a

450 ± 197a

-

-

Mosses

 

256 ± 73z

139 ±71z

-

478 ± 231z

-

Fine roots (<2mm)      

0-2 cm

4.45 ± 3.31z

41.0 ± 26.9z

16.0 ± 4.7z

41.6 ±16.6z

94.0 ± 72.0z

2-7 cma

1.19 ± 0.61

13.6 ± 6.2

15.7 ± 7.2

23.1 ± 5.8

54.3 ± 43.3

7-12 cmb

0.28 ± 0.14

6.45 ±5.30

6.69 ± 3.58

0.79 ± 0.32

1.10 ± 0.67

12-17 cmb

0.13 ± 0.06

1.06 ± 0.38

2.31 ± 0.90

0.04 ± 0.03

0.20 ± 0.14

17-22 cmb

0.06 ± 0.04

0.78 ± 0.58

1.25 ± 0.24

0.00 ± 0.00

0.03 ± 0.03

Small roots (>2mm)      

0-2 cm

-

-

-

-

-

2-7 cm

0.18 ± 0.18c

0.02 ± 0.02c

0.66 ± 0.35bc

39.6 ±14.8ab

72.2 ± 28.9a

7-12 cm

0.01 ± 0.01c

0.26 ± 0.13bc

0.40 ± 0.10bc

0.70 ± 0.35bc

23.5 ± 17.5bc

12-17 cm

0.07 ± 0.07c

0.25 ± 0.11bc

0.18 ± 0.16c

0.12 ± 0.07c

0.06 ± 0.04c

17-22 cm

0.07 ± 0.03c

0.16 ± 0.07c

0.20 ± 0.09bc

0.11 ± 0.09c

0.00 ± 0.00c

Peat        

0-2 cm

-

-

51.8 ± 19.6z

-

53.9 ± 16.6z

2-7 cma

1.94 ± 0.50

5.40 ± 1.94

9.93 ± 4.25

7.55 ± 3.15

15.3 ± 7.6

7-12 cmb

0.39 ± 0.13

3.83 ± 2.86

2.62 ± 1.07

0.65 ± 0.30

0.71 ± 0.65

12-17 cmb

1.18 ± 0.24

1.25 ± 0.49

1.84 ± 0.76

0.30 ± 0.11

0.17 ± 0.14

17-22 cmb

0.48 ± 0.08

0.80 ± 0.59

1.44 ± 0.75

0.10 ± 0.09

0.11 ± 0.08

   Notes: For all categories except fine roots and peat, values with the same letter superscript do not differ significantly; for fine roots and peat, depths with the same letter superscript do not differ significantly (one-way ANOVA for leaves, stems, sedges, and each vegetation/peat category in the 0–2 cm section; two-way ANOVA for fine roots, small roots and mosses/peat, Bonferroni a posteriori comparisons to maintain an experimentwise error rate, a, of 0.05).


 

TABLE B3. Mean 14C quantity (kBq/m2 for leaves, stems, sedges, peat, aboveground belowground and totals; Bq/m2 for small roots, fine roots,) ± standard error of the various vegetation/peat/root categories for the eight cores in each vegetation treatment group. 

Vegetation/peat category
Depth
Vegetation treatment
   
Mosses only
Sedges + mosses
Sedges only
Shrubs + mosses
Shrubs only

Leaves

 

-

-

-

50.8 ± 16.9a

48.3 ± 23.8a

Stems

 

-

-

-

16.4 ± 4.2a

18.3 ±7.1a

Sedges

 

-

82.7 ± 30.1a

117 ± 42a

-

-

Mosses

 

151 ± 42z

69 ± 39z

-

216 ± 87z

-

Fine roots (<2mm)      

0–2 cm

5.7 ± 3.1z

121 ± 108z

93 ± 44z

86 ± 31z

588 ± 418z

2–7 cm

35 ± 22b

558 ± 253ab

1056 ± 525ab

1369 ± 381ab

1774 ± 750a

7–12 cm

10 ± 6b

784 ± 603ab

602 ± 246ab

60 ± 33b

44 ± 24b

12–17 cm

4.4 ± 2.2b

135 ± 3b

147 ± 36ab

1.8 ± 1.5b

10.4 ± 6.5b

17–22 cm

3.9 ± 2.3b

40 ± 23b

81 ± 28b

0.0 ± 0.0b

1.1 ± 0.6b

Small roots (>2mm)      

0–2 cm

0.0 ± 0.0z

0.0 ± 0.0z

0.0 ± 0.0z

0.0 ± 0.0z

0.0 ± 0.0z

2–7 cm

1.6 ± 1.6b

0.2 ± 0.2b

38 ± 33b

2073 ± 878ab

2836 ± 1263a

7–12 cm

0.3 ± 0.2b

14 ± 9b

47 ± 21b

148 ± 93b

1510 ± 1154ab

12–17 cm

9.6 ± 9.6b

20 ± 11b

29 ± 28b

17 ± 10b

7.2 ± 5.5b

17–22 cm

11.4 ± 6.9b

15 ± 10b

12 ± 5b

12 ± 10b

0.0 ± 0.0b

Peat        

0–2 cm

-

-

33 ± 16z

-

23 ± 8z

2–7 cma

3.3 ± 0.9

12 ± 5

24 ± 11

14 ± 5

22 ± 9

7–12 cmb

1.0 ± 0.3

10 ± 7

7.2 ± 2.9

1.7 ± 0.8

1.3 ± 1.1

12–17 cmb

3.9 ± 0.9

4.1 ± 1.7

6.2 ± 2.3

1.0 ± 0.4

0.5 ± 0.4

17–22 cmb

2.0 ± 0.3

3.5 ± 2.8

4.4 ± 2.6

0.3 ± 0.3

0.4 ± 0.2

Aboveground

 

151 ± 42a

152 ± 62a

117 ± 42a

284 ± 100a

67 ± 31a

Belowground

 

10 ± 1a

30 ± 14a

76 ± 28a

21 ± 7a

54 ± 16a

Total

 

161 ± 42a

182 ± 74a

193 ± 69a

305 ± 105a

121 ± 44a

   Notes: For all categories except mosses/peat, values with the same letter superscript do not differ significantly; for mosses/peat, depths with the same letter superscript do not differ significantly (one-way ANOVA for leaves, stems, sedges, each vegetation/peat category in the 0–2 cm section, aboveground, belowground and total biomass; two-way ANOVA for fine roots, small roots and mosses/peat, Bonferroni a posteriori comparisons to maintain an experimentwise error rate, a, of 0.05). 



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