Table 1.

Linear regression for Figure 4 separated by phosphorus (P) concentration with differences between slopes determined using SMATR p < 0.05 level as indicated by different letters.

Regressions for Resource and Microcystis N:P as Shown in Figure 4A
P µg L−1	Equation	r2	p-Value	Slope Comparisons
20	y = 0.412x + 40.27	0.84	<0.0001	a
40	y = 0.792x + 31.99	0.92	<0.0001	b
80	y = 0.721x + 20.29	0.89	<0.0001	b
175	y = 0.237x + 22.26	0.56	<0.0001	c
350	y = 0.149x + 16.44	0.49	<0.0001	c
700	y = 0.156x + 13.31	0.48	<0.0001	c
Regressions for Resource N:P and Microcystin Cell Quota as Shown in Figure 4B
P µg L−1	Equation	r2	p-Value	Slope Comparisons
20	y = 0.060x + 4.29	0.62	<0.0001	a
40	y = 0.021x + 3.81	0.14	0.0232	b
80	y = 0.039x + 4.30	0.39	<0.0001	ab
175	y = 0.061x + 4.03	0.33	0.0003	a
350	y = 0.057 + 4.70	0.35	0.0002	a
700	y = 0.071 + 5.06	0.44	<0.0001	a
Regressions for Microcystis N:P and Microcystin Cell Quota as Shown in Figure 4C
P µg L−1	Equation	r2	p-Value	Slope Comparisons
20	y = 0.137x − 1.15	0.66	<0.0001	a
40	y = 0.023x + 3.20	0.13	0.0322	b
80	y = 0.049x + 3.40	0.36	<0.0001	b
175	y = 0.244x − 1.33	0.55	<0.0001	c
350	y = 0.361x − 1.20	0.62	<0.0001	c
700	y = 0.339x + 1.07	0.49	<0.0001	c