Table 2. Impact of treatment and experiment to betadispersion of bacterial and phytoplankton communities (upper two lines), and pairwise comparisons of betadispersion of experiments (lower three lines).

	Bacteria		phyto
Factors	F	p-value	F	p-value
Treatment	1.125	Ns.	0.336	Ns.
Experiment	12.23	<0.001	15.84	<0.001
May-July		Ns.		<0.05
May-September		<0.001		<0.05
July-September		<0.001		<0.001