Ecological Archives A015-060-A1

Lara M. Kueppers and John Harte. 2005. Subalpine forest carbon cycling: short- and long-term influence of climate and species. Ecological Applications 15:1984–1999.

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.



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