"Toxic blooms" refers to the excessive growth of harmful algae in bodies of water, such as lakes or oceans. These algae produce toxins that can be harmful to animals, plants, and even humans. Full definition
While the growth and duration of toxic blooms expanded between 40 and 60 degrees North latitude, the bloom season actually shortened at lower latitudes. (sciencedaily.com)
We're coming up on the time of year when people will be testing lakes for toxic blooms of cyanobacteria. (michiganradio.org)
However, Cochlan cautions, what exactly triggers toxic blooms is «the million - dollar question» that hasn't been answered. (scientificamerican.com)