Table 1 Live-tree carbon (C) ranges and uncertainty for northwest Oregon (NWOR)

Approach 1: No corrections

Approach 2: Developmental DBH range

Approach 3: With corrections

Species

Minimum

Maximum

Uncertainty

Minimum

Maximum

Uncertainty

Minimum

Maximum

Uncertainty

Tg C

Tg C

% of midpoint

Tg C

Tg C

% of midpoint

Tg C

Tg C

% of midpoint

Picea sitchensis

1.54

4.75

51

1.53

4.13

46

1.55

4.39

50

Pseudotsuga menziesii

9.56

455.32

96

31.26

70.40

38

18.57

135.57

76

Tsuga heterophylla

10.54

32.11

51

11.40

26.33

40

10.99

30.57

47

Acer macrophyllum

1.48

3.12

36

1.92

2.76

18

1.83

3.13

26

Alnus rubra

2.40

16.19

75

10.13

15.59

20

2.98

19.40

73

NWOR total

25.53

512.21

91

56.43

119.19

36

35.92

193.26

68

Negative correlation

Trees 3 to 66 cm diameter at breast height (DBH)

Approach 1: No corrections

Approach 2: Developmental DBH range

Approach 3: With corrections

Species

Minimum

Maximum

Uncertainty

Minimum

Maximum

Uncertainty

Minimum

Maximum

Uncertainty

Tg C

Tg C

% of midpoint

Tg C

Tg C

% of midpoint

Tg C

Tg C

% of midpoint

Picea sitchensis

2.26

3.61

23

1.93

3.37

27

2.13

3.57

25

Pseudotsuga menziesii

28.30

215.23

77

38.18

60.68

23

38.47

98.05

44

Tsuga heterophylla

15.58

23.97

21

14.07

21.08

20

14.93

23.92

23

Acer macrophyllum

1.90

2.70

17

2.08

2.63

11

2.16

2.78

13

Alnus rubra

5.10

14.40

48

11.85

14.08

9

7.78

14.40

30

NWOR total

53.05

259.91

66

68.11

101.83

20

65.48

142.73

37