From Pond Water
Lyngbya normally grows in dense mats at the bottoms of nutrient enriched lakes and spring fed systems. The most common troublesome algae are species of cyanobacteria are:
- Oscillatoriales - filamentous, non endo/exospore-producing; incl. Oscillatoria, Lyngbya, Anabaena
- Nostoc: A fine, filamentous cyanobacteria that can form spherical colonies.
Long blue-green, unbranched filaments that oscillate naturally. Most tolerant of organic pollutants. Oscillatoria spp. often inhabits depths of thermally stratified lakes in which gradients of physical and chemical factors occur. Often found with Euglena in waters with high nitrogen levels. Common in farm ponds and lagoons where sewage is treated. O. pubescent is a red species that can form conspicuous red blooms in eutrophic lakes. Some species of Oscillatoria are known to produce toxins. These include both neurotoxins called anatoxins and hepatotoxins called microcystins. Anatoxins can block the transmission of signals from neuron to neuron and neuron to muscle, while microcystins cause bleeding in the liver. The threat is more to livestock then to humans.