Table 1. Biodiversity and stress effects on log₁₀ biovolume.

	DF	t value	Estimate (s.e.)	P value
Intercept	1,355	77.8	7.799 (0.10)	<0.0001
LDiv	37	2.56	0.475 (0.19)	0.0144
Day	1,355	12.4	0.041 (0.003)	<0.0001
LS	1,355	−0.2	−0.016 (0.09)	0.8560
HS	1,355	−3.5	−0.307 (0.09)	0.0006
LDiv × Day	1,355	−7.6	−0.046 (0.006)	<0.0001
LDiv × LS	1,355	0.8	0.140 (0.17)	0.3968
LDiv × HS	1,355	−4.5	−0.785 (0.17)	<0.0001
LDiv × LS × Day	1,355	−0.9	−0.008 (0.008)	0.3672
LDiv × HS × Day	1,355	10.9	0.098 (0.008)	<0.0001

Mixed effects model estimating the effect of log₁₀ diversity (LDiv), 25 μg l⁻¹ (LS) and 250 μg l⁻¹ (HS) atrazine stress on the log₁₀ biovolume over the course of the experiment (Day). s.e. is the standard error of the estimated fixed effects.