Fig. 2From: Predictions of Cu toxicity in three aquatic species using bioavailability tools in four Swedish soft freshwatersWater chemistry variables vs. BLM results: scatter-plot matrix of some water chemistry variables versus measured and BLM-derived toxicity indices for two species in four lakes. The third and sixth rows show the ratios between the two rows above. The lines are fitted linear regression lines and the shadowed areas represent the 95 % confidence interval of the fitted line Back to article page