Ecological Archives M080-011-A1

Yuriko Yano, Gaius R. Shaver, Anne E. Giblin, Edward B. Rastetter, and Knute J. Nadelhoffer. 2010. Nitrogen dynamics in a small arctic watershed: retention and downhill movement of 15N. Ecological Monographs 80:331–351.

Appendix A (TABLE A1). Descriptions of soil layers and their properties by site.

Layer

Site

Average
thickness (cm)

BD*
(g/cm3)

Water
content†
(%)

Rock
content‡
(%)

Bulk C
(%)

Bulk N
(%)

C:N
(wt)

C:N
(molar)

Green

Crest

1.6

(0.24)

0.075

(0.01)

52.8

(3.6)

0.0

(0.00)

42.0

(0.35)

1.2

(0.04)

35.3

(1.08)

41.3

(1.25)

 

Mid-slope_NWT

2.4

(0.23)

0.038

(0.01)

86.0

(1.2)

0.0

(0.00)

44.9

(0.48)

1.0

(0.03)

48.4

(1.62)

56.5

(1.89)

 

Mid-slope_WT

2.6

(0.20)

0.039

(0.01)

86.8

(2.4)

0.0

(0.00)

43.3

(0.69)

1.1

(0.04)

41.7

(1.91)

48.7

(2.23)

 

Foot-slope_NWT

2.6

(0.40)

0.034

(0.01)

90.4

(0.9)

0.0

(0.00)

43.5

(0.82)

1.1

(0.04)

42.9

(1.48)

50.4

(1.73)

 

Foot-slope_WT

2.3

(0.31)

0.038

(0.00)

89.9

(0.6)

0.0

(0.00)

43.7

(0.52)

1.1

(0.04)

40.5

(1.43)

47.7

(1.68)

 

Riparian

1.7

(0.35)

0.067

(0.02)

91.3

(0.7)

0.0

(0.00)

40.0

(0.64)

1.1

(0.04)

38.1

(1.92)

44.4

(2.24)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1st Organic

Crest

3.8

(0.62)

0.147

(0.04)

62.3

(1.8)

10.8

(4.18)

31.3

(1.65)

1.4

(0.07)

22.1

(0.68)

25.8

(0.78)

 

Mid-slope_NWT

9.9

(0.23)

0.063

(0.01)

87.3

(0.9)

0.0

(0.00)

41.9

(1.32)

1.2

(0.05)

35.6

(2.23)

41.5

(2.60)

 

Mid-slope_WT

9.9

(0.07)

0.080

(0.01)

85.5

(0.9)

0.0

(0.00)

37.4

(1.38)

1.5

(0.07)

26.6

(1.98)

31.0

(2.33)

 

Foot-slope_NWT

9.6

(0.28)

0.080

(0.03)

87.5

(1.8)

0.0

(0.00)

40.6

(1.34)

1.3

(0.07)

34.1

(1.99)

40.0

(2.35)

 

Foot-slope_WT

9.5

(0.29)

0.072

(0.01)

86.4

(0.9)

0.0

(0.00)

40.0

(1.18)

1.5

(0.07)

29.7

(1.95)

34.9

(2.34)

 

Riparian

10.2

(0.12)

0.083

(0.01)

87.2

(0.6)

0.0

(0.00)

38.5

(0.46)

1.9

(0.09)

23.0

(1.54)

26.8

(1.80)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2nd Organic

Crest

.

 

.

 

.

 

.

 

.

 

.

 

.

 

.

 

 

Mid-slope_NWT

6.2

(0.66)

0.363

(0.07)

69.1

(3.3)

2.4

(1.56)

25.9

(2.51)

1.3

(0.11)

19.6

(0.92)

22.9

(1.08)

 

Mid-slope_WT

6.2

(0.63)

0.371

(0.06)

65.9

(3.0)

0.0

(0.00)

24.5

(2.49)

1.3

(0.12)

18.7

(0.98)

21.9

(1.15)

 

Foot-slope_NWT

8.2

(0.68)

0.223

(0.05)

75.2

(2.9)

0.3

(0.25)

31.9

(2.30)

1.7

(0.13)

19.5

(0.87)

22.8

(1.01)

 

Foot-slope_WT

7.5

(0.82)

0.230

(0.04)

73.8

(2.3)

0.0

(0.00)

33.1

(2.02)

1.8

(0.11)

19.0

(1.39)

22.2

(1.62)

 

Riparian

12.6

(1.62)

0.146

(0.01)

81.3

(0.9)

1.4

(1.43)

40.9

(0.35)

2.7

(0.05)

15.5

(0.40)

18.0

(0.47)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mineral

Crest

3.7

(0.61)

0.421

(0.08)

33.5

(2.7)

52.3

(6.88)

9.3

(1.29)

0.5

(0.06)

17.4

(0.85)

20.3

(0.99)

 

Mid-slope_NWT

6.2

(1.00)

0.681

(0.19)

43.5

(6.3)

2.5

(1.70)

11.2

(3.80)

0.6

(0.19)

17.4

(0.50)

20.3

(0.58)

 

Mid-slope_WT

5.7

(1.39)

0.784

(0.11)

39.4

(3.1)

0.5

(0.47)

7.3

(0.94)

0.4

(0.05)

16.1

(0.36)

18.8

(0.43)

 

Foot-slope_NWT

2.9

(1.06)

1.027

(0.29)

54.4

(6.4)

0.1

(0.07)

18.9

(3.81)

1.1

(0.22)

18.2

(0.99)

21.4

(1.18)

 

Foot-slope_WT

4.5

(1.96)

0.808

(0.26)

38.6

(5.6)

0.1

(0.06)

14.5

(4.34)

0.8

(0.24)

20.1

(1.06)

23.6

(1.31)

 

Riparian

.

 

.

 

.

 

.

 

.

 

.

 

.

 

.

 

   Notes: Means and 1 SE (in parentheses) of data from 2003–2005 are shown. Five cores per plot were collected in 2003 and 2004, and four cores in 2005. Green layer = live moss-detritus-plant layer; NWT = non-watertrack; WT = watertrack. *BD = Bulk density of soil without rocks(>2 mm). † Percentage (w/w) of water in field-mosit soil. ‡ Percentage (w/w) of rock in total dry solids (excluding live roots). Note that the organic soil at Crest was too thin to split into two layers and that no mineral soil could be collected at Riparian.


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