Table 3.

Locations of niche centroids (ter Braak and Verdonschot, 1995) showing the relationship between toxigenic taxa and microcystin to water quality variables.

	Dolichospermum	Aphanizomenon	Cylindrospermopsis	Microcystis	Planktothrix	Microcystin
Secchi Depth (m)	1.6	2.1	1.7	1.6	1.7	1.9
Total Nitrogen (mg L−1)	1.17	0.98	1.68	1.30	1.24	1.26
Total Phosphorus (μg L−1)	127	104	182	113	182	79
Surface Temp (°C)	24.0	22.8	23.5	18.6	22.9	23.6
Dissolved Organic Carbon (mg L−1)	7.00	7.43	10.74	8.82	9.69	9.87
N:P	18.17	20.32	15.37	13.36	11.67	19.78
Index Site Depth (m)	6.66	5.41	5.73	6.80	5.76	7.84
Area:Depth	0.24	0.41	0.28	0.48	0.18	0.16