compartmentation of detectable microcystins in individual lakes
ranges from 100% intracellular to 100% extracellular, with large differences
occurring within about 1–2 weeks. The transition from
largely intracellular to extracellular microcystins pools is mainly
due to the release of the toxins during cell lysis in the decline of
blooms and breakdown of mass accumulations (Codd et al., 1999).