Table 1 Synoptic table of vegetation types distinguished by a modified TWINSPAN analysis. Diagnostic species sorted according to the fidelity phi coefficient and the rest according to frequency values. Only species which occurred in at least two clusters are displayed. Significant differentiation of species occurring within the clusters was tested using Fisher´s exact test performed at p-value ≤0.01
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Vegetation type No. 1 2 3
No. of samples 20 21 22 ______
Diagnostic species of vegetation type 1 sorted according to fidelity value
Artemisia princeps 85 10 32
Phragmites japonica 90 48 14
Salix gracilistyla 57 10 9
Barbarea orthoceras 45 5 5
Viola mandshurica 33 . .
Conyza canadensis 38 . 5
Polygonum lapathifolium 45 10 5
Amorpha fruticosa 29 . .
Setaria viridis 43 . 14
Salix koriyanagi 35 10 .
Pinus densiflora juv. 20 . .
Oenothera sp. 25 . 5
Taraxacum sp. 19 . .
Diagnostic species of vegetation type 2 sorted according to fidelity value
Miscanthus sacchariflorus 29 86 14
Artemisia selengensis 5 48 9
Diagnostic species of vegetation type 3 sorted according to fidelity value
Achyranthes japonica . 14 77
Stellaria aquatica 10 24 73
Oenanthe javanica 5 24 64
Salix koreensis 24 57 86
Humulus japonicus 30 52 86
Polygonum maackianum 1 5 36
Rubia akane . . 23
Pilea mongolica 10 . 32
Polygonum perfoliatum 14 48 68
Other species sorted according to their frequency
Phalaris arundinacea 33 86 82
Salix subfragilis juv. 33 52 32
Bidens frondosa 38 19 45
Rumex crispus 33 19 45
Carex maackii . 43 50
Equisetum arvense 40 24 18
Carex heterolepis 29 19 36
Polygonum hydropiper 43 33 5
Phragmites communis 10 38 18
Viola verecunda 33 5 18
Salix chaenomeloides 5 24 23
Glycine soja 14 14 14
Sicyos angulatus 10 5 27
Polygonum sagittatum var. sieboldii 19 10 9
Metaplexis japonica 24 5 9
Chelidonium majus 10 . 27
Polygonum yokusaianum 5 10 14
Chenopodium album 10 . 23
Morus bombycis 14 5 14
Rumex sp. 10 14 9
Commelina communis 14 . 18
Rosa multiflora 5 . 18
Clematis apiifolia 15 . 9
Salix purpurea 10 5 14
Portulaca oleracea 19 10 .
Panicum bisulcatum 10 14 5
Erigeron annuus 5 5 18
Salix pseudolasiogyne 5 14 9
Aster sp. 15 . 5
Lactuca indica 19 . 5
Carex sp. 5 . 14
Panicum dichotomiflorum 5 10 9
Eclipta prostrata 10 10 5
Morus bombycis juv. 5 . 18
Salix siuzevii 10 14 .
Vitis amurensis 5 . 14
Boehmeria spicata 10 . 9
Echinochloa crus-galli 10 5 5
Cyperus iria 14 5 .
Rosa multiflora juv. 5 . 14
Salix koreensis juv. . 5 9
Muhlenbergia japonica 5 . 14
Mentha arvensis var. piperascens 5 14 .
Actinostema lobatum . 14 5
Polygonum thunbergii . 10 9
Artemisia sp. . 10 9
Smilax sieboldii . . 18
Poa compressa 10 . 5
Salix gilgiana 10 . 5
Vicia sp. 10 . 5
Salix koreensis juv. 5 . 9
Dendranthema boreale 10 . 5
Youngia japonica 5 . 9
Melothria japonica . 10 5
Salix subfragilis juv. . 10 5
Hemerocallis sp. 5 . 5
Rorippa palustris 5 5 .
Eleusine indica 5 5 .
Cyperus sp. 5 5 .
Polygonum muricatum 5 5 .
Ludwigia prostrata 5 5 .
Erechtites hieracifolia 5 . 5
Crepidiastrum denticulatum 5 . 5
Xanthium italicum . 5 5
Stellaria alsine . 5 5
Salix pseudolasiogyne juv. . 5 5
Clinopodium gracile . 5 5
Murdannia keisak . 5 5
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