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Postcards




Green algae of various shapes – Pediastrum, Coelastrum and Scenedesmus,
Znojmo Reservoir, July 2004, magnification 400 x.


Cymbella - siliceous frustules are attached to different surfaces by polysacharide stalks,
Dehtář Fishpond, July 2005, magnification 400 x.


Anabaena flos-aquae – a bloom forming filamentous cyanobacterium, Skalka Reservoir,
July 2004, magnification 300 x.


Staurastrum planctonicum – a common desmid accounting for occasional summer peaks of phytoplankton biomass.
Hracholusky Reservoir, August 04, magnification 400 x.


Straigth filaments of Anabaena planctonica,
Hejtman Fishpond, August 2004, magnification 400 x.


Fragilaria crotonesis – one of the most common diatoms of the summer phytoplankton,
Lipno Reservoir, August 2004, magnification 400 x.


Gloeotrichia echinulata – a colony of a splendid but rare filamentous cyanobacterium,
Lipno Reservoir, July 1997, magnification 300 x.


A colonial green alga Oocystis lacustris with noticeable mucilaginous sheaths,
Husinec Reservoir, July 2004, magnification 400 x


Coiled filaments of bloom forming cyanobacterium Anabaena circinalis,
Lipno Reservoir, July 2003, magnification 400 x.



A colony of Microcystis wesenbergii surrounded by a pronounced mucilage sheath,
Skalka Reservoir, July 2004, magnification 400 x.


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Biology Centre of the Academy of Sciences of the Czech Republic, Institute of Hydrobiology