Table 2.

The number of species inside and outside their native range across human uses. Note that one species can be included in more than one use category. Significance levels were determined by comparing the number of introduced vs. number of non-introduced species for any category to all other taxa using Fisher's exact test. Confidence intervals were determined for the percentage of introduced or non-introduced based on an assumption of binomial errors. Other uses include minor uses such as water source.

	Ornamental	Food	Medicinal	Hedging	Other
Native range	837	261	345	15	10
Non native range	250	45	0	5	0
Percentage (95 % CIs)	23.0 % (20.5–25.6)	14.7 % (10.9–19.2)	0 % (0–10.3)	25.0 % (8.7–49.1)	0 % (0–30.8)
Significant	P < 0.01	P < 0.01	P < 0.01	P < 0.58	P < 0.23