Table 3. Effect of sediment origin and environment on sediment processes for the short- and long-term experiments.

	Short-term			Long-term
	Origin	Environment	Origin x Environment	Origin	Environment
CO2 production	F1,60=2	F1,60=17***	F1,60=0.9	F1,32=0.07	F1,32=2
CH4 flux	F1,58=2	F1,58=0.1	F1,58=4*	F1,31=2	F1,31=28***
Nitrification	F1,48=81***	F1,48=9**	F1,48=0.09	F1,29=4	F1,29=6*
Acidic
Aminopeptidase	F1,59=0.7	F1,59=2	F1,59=2	F1,32=0.7	F1,32=0.002
Phosphatase	F1,60=36***	F1,60=2	F1,60=3	F1,30=25***	F1,30=0.03
Sulfatase	F1,60=35***	F1,60=8**	F1,60=2	F1,32=2	F1,32=14**
Alkaline
Aminopeptidase	F1,54=36***	F1,54=6**	F1,54=0.1	F1,30=18**	F1,30=4*
Phosphatase	F1,60=11**	F1,60=0.2	F1,60=1	F1,32=1	F1,32=6*
Sulfatase	F1,56=0.02	F1,56=0.3	F1,56=0.5	F1,32=0.02	F1,32=1.5

The F statistic and degrees of freedom are reported for the two-way ANOVA tests. Statistical significance is indicated by asterisks; *P⩽0.05, **P⩽0.005, and ***P⩽0.0001.