TABLE 1.

Colony characteristics and cell size of Microcystis species isolated from Lake Wannsee in 1999

Species	Colony characteristics	Mean cell diam (μm) ± SD	Reference
M. aeruginosa (Kützing) Kützing	More or less firm, elongated and lobate, usually with distinct holes, net-like clathrate; often more or less dense epiphytic populations of Pseudanabaena muscicola or Nitzschia spp.	4.92 ± 0.13	21
M. ichthyoblabe Kützing	Colonies more or less irregular-spherical, soft; distribution of cells in colonies is irregular or sponge like; margin of colony irregular	3.39 ± 0.18	21
M. wesenbergii (Komárek) Komárek in Kondrateva	Elongated, lobate cells in one layer, with visible margin of mucilage	5.29 ± 0.24	21