Spirogyra is a kind of filamentous algae of the Charophyta division of the Zygnematophyceae class. The weed represents a nonbranching filament consisting of a series of cylindrical cells with the size of up to 0.01 mm each. Each cell of spirogyra is enclosed in a cellulose wall covered with mucus. The algae are easily recognizable by their spirally twisted chloroplasts.
This type of filamentous algae was discovered nearly two centuries ago. Spirogyra is one of the most common algae and is found in freshwater (rarely in salty) waters worldwide. It forms large velvet-like clusters that float on the surface of the water, drift along the bottom or mix with the algal mat of lakes, swamps, ponds, creeks, etc.
Some believe that the cause for the proliferation of spirogyra were favorable warm weather conditions that characterized one of the seasons at Lake Baikal. However, with the onset of cold weather the number of the filamentous algae has not decreased. Ice water did not become an obstacle for the formation of a thick green film on the Lake.
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New photo narrative from our #ThePeopleOfTheLake series.
In 2019 we celebrate the 50th anniversary of the Baikal State Natural Biosphere Reserve. Here is a photo tour around its beautiful boundaries, to see its modern visitors’ center, open-air expositions, and eco-tourist complexes.
The expedition for monitoring of the ecological state of Lake Baikal ended in September. It was organized by En + Group together with the Lomonosov Moscow State University and was aimed at determining the actual risks and threats to the lake created by anthropogenic load, technology-related factor and natural processes. The results of the expedition were summed up by its leader, Candidate of Biological Sciences, Senior Researcher at the Department of Hydrobiology of Moscow State University, Mikhail Kolobov.