Forest Ecosystems

Table 1 Number of trees by diameter class in three datasets used in this study. A total of 1218 trees (1093 Douglas-fir and 125 western hemlock) were used

From: Estimating upper stem diameters and volume of Douglas-fir and Western hemlock trees in the Pacific northwest

DBH Class (cm)	DATASET I		DATASET II	DATASET III
DBH Class (cm)	Douglas-fir	Western hemlock	Douglas-fir	Douglas-fir	Western hemlock
4–8			14
8–12	5		58
12–16	6		104
16–20	42	9	89	2	1
20–24	62	5	62	4	4
24–28	68	14	35	3	1
28–32	72	13	22	2	1
32–36	75	12	8	7	3
36–40	62	15	4	9	3
40–44	54	10	3	7	2
44–48	47	8		13	1
48–52	30	4		6	1
52–56	25	4		10	2
56–60	19	1		4	1
60–64	13	2		1
64–68	7	1		3	2
68–72	9	1		1	2
72–76	5	1
76–80	6
80–84	5			1
84–88				1
88–92	2
92–96	1			1
96–100				1
100–104		1
108–112				1
112–116				2
Total	615	101	399	79	24

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