CyanobacteriaColl1
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These "jelly balls" are colonies of the cyanobacteria species Nostoc pruniforme ("Mare's eggs"), living in freshwater ponds. (Determination was microscopically confirmed by Professor Dr Ludwig Kies, Hamburg.)
Note: Many other single-(or few-)celled organisms also form gelatinous colonies in spherules. A reliable determination is only possible by microscope! The shown species is rather rare today and indicates clean water. Furthermore, my impression is that the trivial name "Mare's eggs" is not exclusively related to the concrete species Nostoc pruniforme, but also used for diverse different spherule algae (?).
Note: Many other single-(or few-)celled organisms also form gelatinous colonies in spherules. A reliable determination is only possible by microscope! The shown species is rather rare today and indicates clean water. Furthermore, my impression is that the trivial name "Mare's eggs" is not exclusively related to the concrete species Nostoc pruniforme, but also used for diverse different spherule algae (?).
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Vlastní dílo (collage of 4 pictures). Location (partially ex situ): North-eastern Lower Saxony, Germany.
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JednořadkaJednořadka (Nostoc) je rod sinic, které tvoří kulovité nebo beztvaré kolonie složené z vláken růžencovitých buněk v rosolovitém obalu. Umí fixovat dusík. Tvoří akinety. V půdě většinou kolonie není příliš výrazná, ale po dešti se zformuje v nápadnou slizovitou masu, o které si dříve lidé mysleli, že spadla z nebe. .. pokračovat ve čtení