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Ecological Processes

Table 2 Basic information of pre- and post-logging stands in secondary forests

From: Effects of logging on the trade-off between seed and sprout regeneration of dominant woody species in secondary forests of the Natural Forest Protection Project of China

Pre-logging

Total stands

Age (year)

~ 60

Mean DBH (cm)

21.26 ± 0.72

Diameter range (cm)

6.1–48.4

Density (trees ha−1)

597

Basal area (m2 ha−1)

21.18

Tree species composition (%)

AM (30), QM (20), JM (20), FM (10), Other species (20)

Post-logging immediately in March 2017

Logging intensity

0% (Control)

25%

50%

Geographic information

41° 50′ 19″ N, 124° 47′ 56″ E

41° 50′ 20″ N, 124° 48′ 6″ E

41° 50′ 18″ N, 124° 47′ 49″ E

Slope (%)

16–29

14–42

12–32

Logging area (ha)

9.1

4.3

4.8

Mean DBH (cm)

20.9 ± 1.12

19.6 ± 0.92

19.2 ± 1.11

Diameter range (cm)

5.4–40

5.2–40

5.3–34.3

Density (trees ha−1)

608

473

305

Basal area (m2 ha−1)

20.36

15.98

10.34

NG ratio

–

0.85

0.96

Logging time

–

2017.03

2017.03

Tree species composition (%)

AM (40), QM (17), FR (12), BD (7), FM (6), Other species (18)

PK (23), JM (15), AM (16), CC (8), FM (8), Other species (30)

QM (31), AM (17), FR (11), SA (9), JM (6), Other species (26)

  1. DBH: diameter of trees at breast height. The values of DBH are presented as means ± S.E.
  2. The tree species composition is determined by percent of density (trees ha−1)
  3. AM = Acer mono; QM = Quercus mongolica; FR = Fraxinus rhynchophylla; BD = Betula dahurica; FM = Fraxinus mandshurica; PK = Pinus koraiensis; JM = Juglans mandshurica; CC = Cornus controversa; SA = Sorbus alnifolia
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