Table 1:

Linear model results showing Chi-squared (χ²), degrees of freedom (DF), and p-values. Tukey’s post-hoc test results between nitrogen:phosphorus (N:P) treatments within day for the homeostasis experiment. For post-hoc analysis of the means note that D>C>B>A.

Variable	χ2		DF		P value
N:P	518.5		10		<0.001
Day	3311		5		<0.001
N:P(Day)	1046		50		<0.001
Post hoc Comparisons
Day
Treatment	5	6	7	8		10	12
(N:P)
1	C	A	BC	A		BD	B
2	B	A	D	B		CD	BC
4	AB	B	CD	C		EF	BC
8	AB	B	AB	B		F	C
12	AB	B	AB	A		EF	D
16	AB	B	AB	A		DE	D
20	A	B	A	A		AC	D
30	AB	B	A	A		A	BC
50	AB	B	A	A		AC	A
75	A	B	A	A		ABC	A
100	A	B	A	A		AC	A
Post hoc Comparisons
N:P treatment
Day	1	2	4	8	12	16	20	30	50	75	100
5	AC	A	A	A	A	A	A	A	A	A	A
6	D	C	B	BC	B	B	B	C	B	BD	BC
7	AB	BC	B	AB	B	B	B	AB	B	AB	B
8	A	B	C	C	B	B	B	BC	B	BC	B
10	BCD	BC	C	D	C	C	C	C	C	D	C
12	CD	C	C	D	D	D	D	D	C	CD	C