Table 2. Summary of the simultaneous multiple regression performed using chlorophyll-a and total phosphorus (TP) as independent variables and the metal (Pb, Cd, Cr, Hg, Cu, Mn, Co) to P ratios in phytoplankton cells from the three lakes as the dependant variable.

Where p < 0.05, the relationship was significant at the 5% level, and where p < 0.10, the relationship is significant at the 10% level.

Metal	Metal : P ratio with
	Chlorophyll a		Total phosphorus
	t	Sig.	t	Sig.
Pb	−0.474	0.640	−2.541	0.017
Cd	−0.179	0.859	−2.457	0.021
Cr	−0.384	0.704	−2.781	0.010
Hg	−1.018	0.318	−1.710	0.099
Cu	−0.507	0.616	−1.189	0.245
Mn	0.167	0.896	0.683	0.501
Co	−0.635	0.531	0.187	0.853