Study Finds Source of Toxic Algal Blooms (VIDEO) Florida Atlantic University This video is under embargo. Please login to access this video. Caption The combination of the freshwater conditions in the estuary, combined with wastewater nitrogen (ammonium) enrichment, resulted in a "perfect storm" bioreactor that supported growth and toxin production in Microcystis. Credit MCTV, Martin County, Florida Usage Restrictions Credit: MCTV, Martin County, Florida License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.