Table 3: Correlations for phytoplankton, zooplankton, Mysis and river flow. Correlation p-values (one-tailed) for correlations between the two variables shown in each row. Transformed data used for p-values were the first-differenced time series used when one or both of the time series were autocorrelated. Empty cells indicate that the time series of neither variable was auto-correlated.

Row	First correlation variable	Second correlation variable	Pearson’s correlation coefficient	p (untransformed data)	p (transformed data)	-
Potential bottom up correlations		-	-	-	-	-
1	River discharge	Total algal biomass	-0.86	0.002	0.006	sig
2	River discharge	Total zooplankton biomass	-0.91	0.001	0.018	sig
3	Phytoplankton	Zooplankton	0.24	0.267		ns
4	River discharge	Mysis biomass	-0.26	0.248	0.065	ns
5	Total algal biomass	Mysis biomass	0.24	0.264	0.167	ns
6	Total zooplankton biomass	Mysis biomass	0.24	0.263	0.107	ns