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Гидроботанические новости

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Гидроботанические новости. Выпуск 2 (18 сентября 2003 г.)


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Acta Micropalaeontologica Sinica 20 (2): 139-146; June, 2003.

DISTRIBUTION AND ECOLOGY OF CHAROPHYTA IN THE NORTHERN KAZAKHSTAN

Boris F. SVIRIDENKO and Tatyana V. SVIRIDENKO
(Botany Department, Omsk State Pedagogical University, 644099, Omsk, Russia.

Abstract: In the Northern Kazakhstan are known 26 species of Charophyta, with the most rich occurrence in Kochchetav Hills. Total range of salinity of the algal ecotopes is 0.2-44.9g/L, but most of the species develop in fresh or slightly saltish water with salinity not exceeding 1-5 (8)g/L. Under hyperhaline conditions with salinity of 41.1-44.9g/L only Lamprothamnium papulosum was found. The maximum depth of Charophyta occurrence is 7 meters, and most of the species do not spread to the depth of 1 meter. The main types of sediments in the algal habitats are sand and gray silt. Some species such as Chara kirghisorum, C. globularis, C. tomentosa, and Nitellopsis obtusa form stable vegetations. The rest of the species are part of temporary groupings of hydromacrophytes on periodically drying parts of lakes.
Key words: Charophyta, ecology, distribution, coenoses, Northern Kazakhstan.


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