Microbial populations Actinomycetes 1 Algal blooms 1 Aquatic biota 1 Blue green algae 1 Ecosystems 1 Eutrophication 1 Food webs 1 Freshwater microbiology 1 Lakes 1 Lentic systems 1 Lotic systems 1 Microbial ecology 1 Microbial growth 1 Microorganisms 1 Oomycetes 1 Streams 1 Zooplankton 1 protozoa 1 true fungi 1