Algal blooms Toxic algae 3 Eutrophication 2 Actinomycetes 1 Algae, Blue-green 1 Algal toxins 1 Aquatic biota 1 Blue green algae 1 Cyanobacteria 1 Ecosystems 1 Food webs 1 Freshwater microbiology 1 Lakes 1 Lentic systems 1 Lotic systems 1 Microbial populations 1 Oomycetes 1 Streams 1 Water pollution 1 Zooplankton 1 protozoa 1 true fungi 1