|Dra. Ángela Juárez
Jefe de trabajos prácticos, UBA
Planktonic microalgae are an important model system to study the toxicity of aquatic pollutants in vivo due to their fundamental role as primary producers in the trophic chains, and their participation in the accumulation and transfer of toxic compounds to higher trophic levels. We evaluate the toxic effects and the risks involved in the contamination of herbicides (glyphosate and imidizolinones) for aquatic organisms, analyzing their action mechanisms in cultures of microalgae and in simple trophic chains. We develop monoculture experiments with species from culture collections, and isolated from local bodies of water, and evaluate the toxic effect at the morphological, ultrastructural, and physiological levels (in particular, alterations associated with oxidative stress). We also establish simple producer-consumer experiments (algae-bivalve) and analyze the toxic effects at the consumer level.