Table 2. Importance value(IV) of woody plants for 7 vegetation units classified in the study area.

Community type VU1 VU2 VU3 VU4 VU5 VU6 VU7
Importance Value of Tree layer(%)
Abies nephrolepis 27.28 21.20 22.15 23.58 26.42 28.34 39.22
Quercus mongolica 24.11 12.62 13.76 19.00 24.22 4.84 4.66
Betula ermanii 6.06 6.76 6.06 4.60 6.50 8.42 9.58
Sorbus commixta 4.32 6.71 5.13 2.87 5.63 10.91 10.37
Tilia amurensis 5.86 6.25 5.92 5.74 8.87 2.99 3.68
Acer pseudosieboldianum 6.08 7.63 7.53 7.74 5.28 0.34 -
Pinus koraiensis 8.16 6.03 1.88 4.35 6.59 3.39 7.12
Magnolia sieboldii 1.17 3.31 3.90 3.43 - 5.65 2.85
Acer komarovii 2.63 2.55 2.59 4.69 1.47 3.53 2.25
Acer pictum var. mono 0.63 3.22 5.59 0.68 1.34 2.58 2.90
Taxus cuspidata 1.39 3.49 0.84 3.44 - 4.21 -
Acer ukurunduense 0.24 4.12 0.31 0.35 - 5.23 2.12
Prunus padus 0.40 1.79 1.36 0.77 0.91 4.22 2.54
Fraxinus rhynchophylla 1.20 1.34 2.51 0.69 1.68 1.29 0.58
Cornus controversa 0.56 1.22 3.23 - - 1.24 -
Aria alnifolia. 1.22 0.44 2.07 1.24 2.41 - -
Prunus maximowiczii 0.73 1.10 0.54 0.57 0.77 1.50 1.17
Carpinus cordata - 1.01 2.23 2.22 0.41 0.28 -
Betula costata 0.41 0.95 0.78 1.85 - 1.57 -
Rhododendron schlippenbachii 1.54 0.79 - 2.39 0.80 0.23 1.43
Euonymus macropterus 0.24 0.94 0.27 0.96 - 1.94 1.83
Prunus maackii - 0.37 0.94 0.30 0.51 1.43 0.72
Pinus densiflora 1.26 0.68 0.15 0.51 1.66 - -
Betula schmidtii 1.36 0.25 0.28 0.85 0.46 0.13 0.72
Fraxinus mandshurica - 0.13 1.56 1.71 - 0.31 -
Salix caprea 0.39 0.47 0.80 1.59 - 0.17 -
Prunus sargentii 0.96 0.42 0.12 - 0.38 0.18 0.88
Acer barbinerve 0.13 0.42 0.15 0.99 0.33 0.78 -
Syringa reticulata - 0.34 0.23 0.52 - 0.87 -
Pyrus ussuriensis - 0.41 0.97 - 0.33 0.16 -
Kalopanax septemlobus 0.27 - 1.07 - 0.79 - -
Maackia amurensis 0.42 0.12 0.53 0.32 0.66 - -
Fraxinus sieboldiana 0.19 0.11 0.25 0.37 0.81 - 1.40
Euonymus sachalinensis 0.36 0.22 0.26 - 0.32 0.29 -
Syringa villosa subsp. wolfiien 0.33 0.34 0.23 - - 0.19 -
Thuja koraiensis - 0.12 - - - 0.42 1.85
Abies holophylla - 0.32 0.53 - - - -
Acer mandshuricum - 0.65 - 0.27 - - -
Ulmus laciniata - 0.35 - - 0.45 0.19 -
Prunus serrulata var. pubescens - - - 0.61 - 0.40 -
Picea jezoensis - - 0.43 - - 0.21 -
Ulmus davidiana var. japonica - - 0.44 - - 0.13 -
Pyrus pyrifolia - - 0.59 - - - -