Table 1.

Results of one-way BACI ANOVAs comparing differences between monthly mean data for bacteria, phytoplankton and zooplankton from Lake 260 and for unimpacted reference lakes before, during and after EE2 additions. No corrections were made for multiple comparisons.

group	F ratio	d.f.	p-values
bacteria (mg m−3 ww)	1.88	2, 34	0.17
total phytoplankton (mg m−3 ww)	0.78	2, 37	0.47
Cyanophyta (mg m−3 ww)	0.28	2, 37	0.76
Chlorophyta (mg m−3 ww)	0.19	2, 37	0.83
Chrysophyta (mg m−3 ww)	0.30	2, 37	0.74
diatoms (mg m−3 ww)	0.27	2, 37	0.49
Cryptophyta (mg m−3 ww)	0.98	2, 37	0.39
total Crustacea (mg m−3 dw)	3.01	2, 39	0.06
Calanoida (mg m−3 dw)	6.23	2, 39	0.004
Cyclopoida (mg m−3 dw)	1.91	2, 39	0.16
Cladocera (mg m−3 dw)	0.16	2, 39	0.86
Rotifera (mg m−3 dw)	10.03	2, 37	<0.0001
crustacean richness	2.05	2, 39	0.14
rotifer richness	0.41	2, 37	0.67