Table 2.

Significance of the selected explanatory variables in the RDA correlation triplots (see Figure 7).

Explanatory Variable	AIC	Pseudo-F	P
DO	118.36	15.47	0.005
pH	121.73	11.32	0.005
NH4+	122.23	10.73	0.005
DOC	122.64	10.25	0.005
NO3-	127.42	4.92	0.005
Temperature	127.08	5.29	0.005

The explanatory variables were selected by forward selection based on the pseudo-F statistic, using 9999 permutations to assess their significance. AIC = Akaike information criterion. Total variation explained by the RDA model was 48%.