TABLE 2.

The average maximal growth increase relative to the control level of the curves which were best described with a dose-response model including hormesis for the four species included in the study. Also given is the average ED/EC₀, which corresponds to the concentration where the response is equal to the control.

Species	Response increase (%)	ED/EC0 (% of EC50)	Distance between Cmax and ED/EC0	n
L. minor	13 ± 5	28 ± 14	13 ± 16	32
P. subcapitata	16 ± 16	35 ± 18	8 ± 4	18
T. inodorum	38 ± 13	39 ± 17	23 ± 23	11
S. media	43 ± 23	60 ± 28	10 ± 15	29

The ED/EC₀ is given as percent of the ED/EC₅₀. The distance between the concentration of the maximal growth increase (C_max) and the ED/EC₀ is given as –fold increase in concentration.