Table 1. The Chao estimates of total species richness, standard error, and ratio of observed richness to estimated Chao richness for the entire dataset, each successional stage, each sampling time, and each plant species.

Variable	Variable Level	Chao estimate	Chao estimate Standard Error	Observed∶Estimated
All records	none	42.72	2.79	0.94
Successional stage	old	33.08	2.51	0.94
	young	35.33	4.93	0.85
Sampling Time	June	36.10	7.10	0.78
	July	45.00	16.50	0.64
	October	43.00	8.37	0.77
Plant species	FV	24.40	5.92	0.74
	GL	16.25	7.55	0.62
	GP	17.08	0.34	0.10
	GR	21.00	11.66	0.62
	HM	11.00	0.00	1.00
	HN	33.10	7.10	0.76
	OA	27.10	7.10	0.70
	PQ	17.67	1.31	0.96
	TP	9.50	2.29	0.84
	VC	25.14	1.51	0.95
	VM	43.17	17.42	0.53

 =  Fragaria vesca, GL =  Galeobdolon luteum, HN =  Hepatica nobilis, OA =  Oxalis acetosella, TP =  Trifolium pratense, GP =  Geranium pratense, GR =  Geum rivale, HM =  Hypericum maculatum, PQ =  Paris quadrifolia, VC =  Veronica chamaedrys, and VM =  Viola mirabilis). Plant species are represented by two letters, and the abbreviations represent the following plant species: FV