Table 2. Number of observations of the different limitation types in the four lakes.

	Number of Observations
Lake	N	P	Co	Primary N	Primary P	Light	Co light/Nut.	No Response	n
SCH	2	7	3	2	9	0 (n = 4)	1 (n = 4)	1	13
LAN	5	1	6	11	1	0 (n = 0)	0 (n = 0)	0	12
MUEG	3	4	0	3	4	3 (n = 7)	1 (n = 7)	3	13
UH	1	3	0	1	3	5 (n = 9)	1 (n = 9)	2	11
Total	11	15	9	17	17	8 (n = 20)	3 (n = 20)	6	49

N: serial+single N limitation; P: serial+single P limitation; Co: independent+simultaneous co-limitation; Primary N: N+independent co-limitation (primary N); Primary P: P+independent co-limitation (primary P); Light: number of experiments showing light limitation; Co light/Nut.: number of co-limitation between light and Nutrients, n: number of experiments. In the columns Light and Co light/Nut. n gives the number of experiments where light limitation was tested.