Table 1 Plots information and main species in sample plots. Main species are tree species with quantity > 3 and shrub/grass species with important value > 1. Important value is the average of relative coverage, relative frequency and relative density

From: Population Structure and Spatial Pattern of Main Tree Species in Secondary Betula platyphylla Forest in Ziwuling Mountains, China

 

Slope (°)

Slope aspect (°)

Altitude (m)

Canopy density (%)

Average DBH (cm)

Plots information

20–35

N by W 21–45

1219–1235

65–85

15.17

Main species

   
   

Quantity

 

Tree

Betula platyphylla

465

  

Quercus wutaishanica

339

  

Pinus tabulaeformis

74

  

Populus davidiana

36

  

Acer ginnala

8

  

Carpinus turczaninowii

4

  

Robinia pseudoacacia

3

   

Important value

 

Shrub

Lespedeza bicolor

7.14

  

Ostryopsis davidiana

6.34

  

Rosa hugonis

5.53

  

Spiraea japonica

4.65

  

Lonicera fragrantissima

3.11

  

Acer ginnala

3.07

  

Elaeagnus pungens

2.78

  

Syringa pekinensis

2.07

  

Viburnum dilatatum

1.38

 

Grass

Carex lanceolata Boott

18.93

  

Festuca ovina

11.49

  

Anemone vitifolia

7.59

  

Aster tataricus L.

6.46

  

Vicia sepium

4.10

  

Arundinella anomala

3.82

  

Potentilla chinensis

3.40

  

Carpesium abrotanoides L.

2.87

  

Saussurea japonica

2.64

  

Adenophora stricta

2.43

  

Lespedeza davurica

2.40

  

Tripolium vulgare

2.29

  

Setaria viridis

2.02

  

Duchesnea indica

1.99

  

Rubia cordifolia

1.84

  

Heteropappus altaicus

1.76

  

Anaphalis sinica

1.66

  

Viola philippica

1.49

  

Draba nemorosa

1.18

  

Bupleurum chinense

1.01

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