Table 3. List of indicator species with their IndVal (Indicator Value) percentage and p value for the seven vegetation types of Robinia pseudoacacia plantations.

Species	Observed indicator value	IV from randomized groups		P	Species	Observed indicator value	IV from randomized groups		P
	IndVal(%)	Mean	S.Dev			IndVal(%)	Mean	S.Dev
Quercus mongolica-Polygonatum odoratum var. pluriflorum type				Alnus japonica	38.3	16.2	6.6	*
Quercus mongolica	66.3	13.9	7.0	***	Rubus parvifolius	37.0	14.3	7.1	*
Polygonatum odoratum var. pluriflorum	69.1	13.7	7.1	***	Bromus remotiflorus	38.3	16.2	6.7	*
Fraxinus sieboldiana	51.6	15.0	7.4	***	Cyrtomium fortunei	38.3	16.1	6.8	*
Lindera obtusiloba	43.4	13.4	6.6	**	Spiraea prunifolia f. simpliciflora	35.5	14.2	7.2	*
Carex humilis var. nana	46.9	13.9	7.4	**	Celastrus orbiculatus	32.8	13.8	7.0	*
Carex fililpes var. oligostachys	38.3	16.1	7.2	**	Paederia foetida	34.1	14.5	7.1	*
Athyrium yokoscense	45.8	13.8	7.4	**	Quercus variabilis-Lindera glauca type
Syneilesis palmata	38.3	15.9	7.1	**	Lindera glauca	44.0	13.5	6.8	***
Persicaria nepalensis	38.3	16.1	7.1	**	Cocculus orbiculatus	39.9	13.9	7.1	**
Hosta longipes	38.3	16.0	7.0	**	Quercus variabilis	34.4	13.8	7.0	**
Lonicera praeflorens	38.3	16.0	7.3	**	Ailanthus altissima	34.4	13.8	7.0	**
Prunus serrulata var. pubescens	35.4	13.7	7.2	**	Securinega suffruticosa	34.4	13.9	7.1	*
Fraxinus rhynchophylla	40.4	15.0	7.4	**	Cardamine flexuosa	35.3	13.7	6.8	*
Rhododendron mucronulatum	30.1	13.7	7.2	*	Cornus walteri	33.6	14.8	7.3	*
Artemisia keiskeana	30.0	14.9	7.3	*	Diospyros lotus	33.3	13.9	7.0	*
Castanea crenata-Smilax china type				Pyrus ussuriensis	30.8	15.3	7.6	*
Castanea crenata	33.5	13.6	6.8	*	Boehmeria platanifolia	31.2	14.7	7.5	*
Smilax china	30.3	13.5	6.6	*	Zanthoxylum schinifolium	31.6	13.6	7.0	*
Clematis apiifolia-Lonicera japonica type				Ulmus parvifolia-Celtis sinensis type
Lonicera japonica	31.0	13.7	7.0	*	Ulmus parvifolia	46.0	13.9	7.4	**
Conyza canadensis	30.8	14.7	7.3	*	Celtis sinensis	44.2	13.5	7.0	**
Clematis apiifolia	30.1	13.8	7.4	*	Quercus variabilis	39.4	13.2	6.3	**
Rosa multiflora-Artemisia indica type				Chenopodium album var. centrorubrum	30.2	14.4	7.2	*
Artemisia indica	57.1	13.8	7.2	***	Prunus padus-Celastrus flagellaris type
Stellaria aquatica	50.4	14.3	7.2	**	Celastrus flagellaris	63.0	13.8	7.3	***
Erigeron annuus	51.9	14.2	7.1	**	Galium spurium	54.4	13.9	7.6	***
Chelidonium majus subsp. asiaticum	47.3	13.7	7.0	**	Prunus padus	41.9	14.3	7.2	**
Rosa multiflora	43.2	13.6	6.9	***	Liriope muscari	38.5	13.6	7.2	*
Quercus acutissima	34.9	13.4	6.5	*	Commelina communis	31.7	13.7	6.8	*
Aconitum jaluense	38.3	16.0	6.5	*	Fallopia dumetorum	30.3	14.3	7.0	*