This webinar series addresses “Algal toxins production and risk for human health,” one of the top 20 priority research question identified by the Global Horizon Scanning Project, SETAC Latin America. The webinar was produced by PhD Helena C. S. Assis, professor at the Paraná Federal University (Brazil), and PhD (in progress) Sabrina L. M. Calado.
Please note that the videos are in Spanish and Portuguese.
Eutrophication has a profound negative impact on the aquatic ecosystem. This ecological process characterized by the increase of nutrients, mainly phosphorus and nitrogen, can result in cyanobacterial blooms, which can have toxic effects on aquatic organisms. Water supply reservoirs are constantly impacted by anthropogenic activities, which can result in eutrophication of these water bodies and consequently create the presence of cyanobacterial blooms. The cyanotoxins that are most commonly found in the water supply reservoirs of South Brazil are microcystins and saxitoxins. Studies carried out in two freshwater fish reservoirs have reported adverse effects such as oxidative stress, alteration in osmoregulation and genotoxicity. Due to the persistence of these toxins in fish muscles, they can be transferred through the food chain, causing a risk to human health.