Elevated enzyme activities agreed to different pollution levels, especially inorganic nitrogen loads combined with elevated lead and aluminum concentrations, all of them originated by anthropogenic activities, thus presenting Myriophyllum quitense and Myriophyllum spicatum as a good biomonitors for assessment of water quality in their corresponding polluted aquatic ecosystem.
The sole effect of the suspected parameters obtained from the field experiments, were verified via laboratory experiments using M. mattogrossense as test organism in order to confirm the correlation of the antioxidant and biotransformation responses of the utilized biomonitoring organisms. Furthermore, the effect of ammonium as trigger for oxidative stress is discussed proposing a feasible explanation for ammonium toxicity.
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