Table 1. A summary table that indicates community types and vegetation units with constancy. Roman numerals(including ‘r’) indicate constancy classes, while Arabic numerals(including ‘r’ and ‘+’) indicate coverage classes. 376 species were found in the study site, and differential species whose constancy below 30% were not shown on this table.

Abies nephrolepis-Acer pseudosieboldianum community

Vaccinium hirtum var. koreanum subcommunity

Acer ukurunduense subcommunity

Acer pictum var. mono subcommunity

Abies nephrolepis-Acer pseudosieboldianum typical subcommunity

Dryopteris crassirhizoma variant

Abies nephrolepis-Acer pseudosieboldianum typical variant
Ⅱ. Abies nephrolepis-Dryopteris crassirhizoma community
Ⅲ. Abies nephrolepis typical community
Community Type Community Ⅰ Ⅱ Ⅲ
Subcommunity Ⅰ-1 Ⅰ-2 Ⅰ-3 Ⅰ-4
Variant Ⅰ-4-a Ⅰ-4-b
The number of stands 40 38 35 17 14 39 9
Vegetation Unit VU1 VU2 VU3 VU4 VU5 VU6 VU7
Abies nephrolepis Ⅴ +-4 Ⅴ 1-3 Ⅴ 1-4 Ⅴ 1-4 Ⅴ 2-3 Ⅴ +-5 Ⅴ 1-5
Sorbus commixta Ⅳ +-3 Ⅳ +-3 Ⅳ +-3 Ⅲ r-2 Ⅳ +-2 Ⅴ +-4 Ⅴ +-2
Quercus mongolica Ⅴ 1-4 Ⅳ +-4 Ⅴ +-4 Ⅴ 1-4 Ⅴ 1-4 Ⅱ +-3 Ⅱ 1-3
Pinus koraiensis Ⅴ +-4 Ⅴ r-2 Ⅲ r-1 Ⅲ 1-2 Ⅳ r-3 Ⅳ +-1 Ⅴ 1-2
Species group 1. Differential species of the Abies nephrolepis-Acer pseudosieboldianum community
Acer pseudosieboldianum Ⅴ +-4 Ⅴ +-3 Ⅴ +-3 Ⅴ 1-3 Ⅴ +-3 - -
Carex siderosticta Ⅳ +-3 Ⅳ +-2 Ⅳ +-2 Ⅳ +-3 Ⅳ +-3 Ⅰ +-2 Ⅰ 1
Species group 2. DS of the Vaccinium hirtum var. koreanum subcommunity
Vaccinium hirtum var. koreanum Ⅴ r-3 Ⅱ +-2 - - - Ⅰ r-+ Ⅱ +-2
Sasa borealis Ⅱ +-3 r 1 Ⅰ +-3 Ⅰ 1 Ⅰ 2-5 r 5 -
Rhododendron brachycarpum Ⅰ +-1 Ⅰ + r + Ⅰ + - Ⅰ +-2 -
Species group 3. DS of the Acer ukurunduense subcommunity
Acer ukurunduense - Ⅴ +-2 - - - Ⅲ +-3 Ⅱ +-1
Acer mandshuricum - Ⅱ +-2 Ⅰ +-1 Ⅰ r-1 - Ⅰ r-+ -
Parasenecio auriculatus var. kamtschatica r + Ⅱ +-1 Ⅰ +-1 Ⅰ +-3 - Ⅰ r-+ -
Species group 4. DS of the Acer pictum var. mono subcommunity
Acer pictum var. mono Ⅰ +-2 Ⅲ +-2 Ⅴ +-3 - - Ⅱ +-3 Ⅱ +-1
Cornus controversa Ⅰ +-2 Ⅰ +-1 Ⅱ +-3 - - 4 1-2 -
Species group 5,6. DS of the Dryopteris crassirhizoma variant /Abies nephrolepis-Dryopteris crassirhizoma community
Dryopteris crassirhizoma Ⅲ +-3 Ⅳ r-4 Ⅳ r-3 Ⅴ r-2 - Ⅴ r-4 -
Pedicularis resupinata Ⅲ +-3 Ⅳ r-2 Ⅱ r-3 Ⅳ r-1 - Ⅲ +-3 -
Companion species
Rhododendron schlippenbachii Ⅴ 1-5 Ⅳ +-4 Ⅳ r-4 Ⅳ 1-3 Ⅳ 1-4 Ⅱ 1-3 Ⅲ 2-3
Magnolia sieboldii Ⅳ +-3 Ⅳ +-3 Ⅳ r-3 Ⅳ +-3 Ⅰ r-1 Ⅳ +-4 Ⅲ +-2
Acer komarovii Ⅴ +-3 Ⅳ +-3 Ⅳ +-3 Ⅳ+-2 Ⅱ +-3 Ⅲ +-3 Ⅱ 1-2
Tripterygium regelii Ⅴ +-4 Ⅳ +-4 Ⅲ +-3 Ⅳ+-4 Ⅲ +-1 Ⅲ +-3 Ⅲ +-1
Betula ermanii Ⅳ +-4 Ⅳ +-4 Ⅲ +-3 Ⅲ +-2 Ⅳ +-3 Ⅲ +-5 Ⅳ 1-3
Tilia amurensis Ⅳ +-3 Ⅳ +-2 Ⅳ +-2 Ⅳ +-2 Ⅳ +-3 Ⅱ +-3 Ⅲ 1
Dryopteris expansa Ⅲ +-3 Ⅲ r-3 Ⅱ +-2 Ⅳ +-2 Ⅰ 1-2 Ⅲ +-3 Ⅲ 1-2
Calamagrostis arundinacea Ⅳ +-4 Ⅲ +-3 Ⅲ +-3 Ⅳ +-3 Ⅲ +-4 Ⅱ +-2 Ⅱ +
Rhododendron mucronulatum Ⅳ +-4 Ⅱ +-3 Ⅰ +-3 Ⅲ +-2 Ⅳ +-3 Ⅲ +-4 Ⅴ 1-4
Solidago virgaurea subsp. asiatica Ⅳ r-3 Ⅲ r-1 Ⅲ r-2 Ⅳ r-4 Ⅲ +-1 Ⅱ r-3 Ⅰ 1
Prunus padus Ⅰ +-1 Ⅲ +-1 Ⅲ r-3 Ⅰ +-1 Ⅰ 1 Ⅲ +-3 Ⅲ 1-2
Euonymus macropterus Ⅱ +-1 Ⅱ +-1 Ⅲ +-3 Ⅱ +-2 Ⅰ +-1 Ⅲ r-3 Ⅲ +-2
Angelica gigas Ⅱ +-1 Ⅲ r-1 Ⅲ r-2 Ⅲ r-3 Ⅲ +-1 Ⅱ r-3 Ⅱ +
Astilbe chinensis Ⅱ r-2 Ⅱ r-2 Ⅲ +-4 Ⅲ r-1 Ⅲ r-3 Ⅰ +-1 Ⅱ +-1
Weigela florida Ⅱ +-1 Ⅱ +-2 Ⅱ r-3 Ⅲ +-1 Ⅱ +-1 Ⅲ +-3 Ⅱ 1
Other 345 species were omitted