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Table 1 Mean (± standard deviation, minimum and maximum) of stand density (N, trees ha−1), diameter at breast height (DBH, cm), and annual basal area growth (ΔBA, cm2 year−1) for the different CTRN treatments 1 and 10 years after thinning (n = 6 per treatment)

From: Evaluation of 10-year temporal and spatial variability in structure and growth across contrasting commercial thinning treatments in spruce-fir forests of northern Maine, USA

 

Control

33% Crown

33% Dominant

33% Low

50% Crown

50% Dominant

50% Low

1 year post-treatment

N

4822 ± 2169 (1963–7258)

1761 ± 617 (988–2654)

2481 ± 1123 (1407–4333)

1473 ± 478 (1074–2185)

1446 ± 550 (926–2432)

1979 ± 1185 (1049–3975)

874 ± 187 (654–1197)

DBH

10.2 ± 5.0 (0.8–47.8)

12.0 ± 5.3 (1.0–30.5)

10.3 ± 4.0 (1.3–23.1)

14.6 ± 4.6 (1.3–35.1)

11.7 ± 5.8 (1.3–32.3)

10.1 ± 3.8 (1.3–29.7)

16.9 ± 4.7 (2.5–31.2)

ΔBA

1.98 ± 3.75 (0–40.28)

3.43 ± 5.40 (0–52.44)

2.65 ± 3.87 (0–44.39)

4.94 ± 5.74 (0–49.57)

5.00 ± 7.17 (0–54.12)

2.93 ± 4.86 (0–50.72)

6.93 ± 6.91 (0–44.39)

10 years post-treatment

N

3259 ± 1076 (1703–4320)

1107 ± 428 (506–1605)

1378 ± 824 (568–2679)

1323 ± 436 (951–2049)

796 ± 462 (432–1691)

866 ± 781 (173–2210)

710 ± 212 (506–1062)

DBH

13.0 ± 5.5 (1.5–52.6)

15.4 ± 6.4 (2.0–36.3)

13.5 ± 5.0 (1.5–29.7)

17.3 ± 5.2 (2.3–43.9)

16.2 ± 7.4 (1.3–36.1)

13.3 ± 4.9 (2.5–32.0)

20.3 ± 5.0 (4.8–36.6)

ΔBA

2.87 ± 5.30 (0–73.37)

6.89 ± 8.85 (0–65.11)

6.17 ± 8.00 (0–72.97)

7.29 ± 8.50 (0–64.61)

8.73 ± 12.17 (0–88.17)

7.65 ± 9.98 (0–78.44)

10.29 ± 10.04 (0–61.57)