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Hydrobiological Journal
Главный редактор: S. A. Afanasyev (open in a new tab)
Заместитель главного редактора: V.I. Yurishinets (open in a new tab)
Ответственный секретарь редакционной коллегии: L.I. Kalinina (open in a new tab)

Выходит 6 номеров в год

ISSN Печать: 0018-8166

ISSN Онлайн: 1943-5991

SJR: 0.221 SNIP: 0.469 CiteScore™:: 0.9 H-Index: 12

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The Change in the Length of Colonies of the Planktonic Diatom Aulacoseira baicalensis in Various Stages of the Annual Cycle in Lake Baikal

Том 43, Выпуск 5, 2007, pp. 79-86
DOI: 10.1615/HydrobJ.v43.i5.50
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Краткое описание

Morphology of the diatom alga Aulacoseira baicalensis (K. Meyer) Simonsen dominating in Lake Baikal was studied in its natural populations during a year using light and scanning electron microscopy. At the beginning of the under-ice development of the alga, there were only linking spines in its filaments, and a gradual increase in its colony lengths was registered. The separation spines started to develop when algal cell concentrations in its mucilaginous aggregations reached maximal values. The formation of conical separation spines in colonies, subsequent division of colonies into shorter fragments and then their dispersal in plankton were observed after the ice-melting. An increase in the algal population density, a rise of water temperature and the lowering of phosphate and silicon concentration could play a role of a “signal” to start forming separation valves.

ЦИТИРОВАНО В
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