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Woronichina naegeliana cyanobacteria, light micrograph
Differential interference contrast (DIC) light micrograph of a cyanobacteria Woronichinia naegeliana. Woronichinia naegeliana can be found in freshwater nutrient-rich lakes and can form dense blooms. It is one of the most common species associated with toxic cyanobacteria bloom (algal blooms). Woronichinia naegeliana can produce anatoxins (nerve toxin), microcystins (liver toxin), microginins (liver toxin), and other less common toxins. There are gas vesicles in Woronichinia cells that provide a mechanism to move up and down in the water column, which increases access to nutrients and other growth factors. Magnification: x180 when printed at 10 centimetres wide at its longest edge., by HAKAN KVARNSTROM / SCIENCE PHOTO LIBRARY
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