Table 3. Tests for homogeneity of variance.

Test	Comparison	Test statistic	p-value
Levene's test (multiple samples)	All three lakes (PC1)	0.210	0.811
	All three lakes (PC2)	3.928	0.023*
F-test (PC1)	LT (0.004) vs. LM (0.005)	F-ratio = 1.340	0.357
	LT vs. LV (0.004)	F-ratio = 1.055	0.994
	LM vs. LV	F-ratio = 1.413	0.574
F-test (PC2)	LT (0.006) vs. LM (0.003)	F-ratio = 0.471	0.014*
	LT vs. LV (0.001)	F-ratio = 4.137	0.021*
	LM vs. LV	F-ratio = 1.950	0.254

The PC score variance is given once in parentheses for each individual lake dataset.

*denotes a significant difference.