Table 3. Results from a permutational multivariate analysis of variance comparing the bacterial (LH-PCR) and phytoplankton communities among seasons (experiments) and after nutrient additions (treatments).

LH-PCR	df	SS	MS	pseudo-F	p
Season	2	5.75	2.88	235.88	<0.001
Treatment	3	0.54	0.18	14.79	<0.001
Treatment (season)	6	0.26	0.04	3.59	<0.001
May (Treatment)	3	0.39	0.13	11.63	<0.001
July (Treatment)	3	0.38	0.13	6.06	<0.005
September (Treatment)	3	0.03	0.01	2.53	Ns.

Dissimilarities in community composition were estimated using Morisita-Horn distance metrics. The statistical significance was determined by Monte Carlo simulations (p-value from 10,000 permutations) and F-values.