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International Journal on Algae
SJR: 0.219 SNIP: 0.261 CiteScore™: 0.24

ISSN Imprimir: 1521-9429
ISSN On-line: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v5.i1.70
pages 68-77

On the distribution patterns and dispersal of Actinocyclus normanii (Greg.) Hust. emend. Genkal et Korneva (Bacillariophyta) in the reservoirs of the Volga River Basin

L. G. Korneva
I. D. Papanin Institute of the Biology of Inland Waters, Russian Academy of Sciences, 152742 Borok, Nekouzskiy Region, Yaroslavl Province. Russia

RESUMO

Probable explanations of the distribution patterns and dispersal of Actinocyclus normanii (Greg.) Hust. amend. Genkal et Korneva (Bacillariophyta) recorded between 1986-1998 in the reservoirs of the Volga River Basin are discussed. It is likely that migration of this species from the Caspian Sea was favored by changes in hydroclimatic processes, in particular the processes of maerocirculation, and also by the geochemical peculiarities of the Volga catchment area that influenced the chemical composition of water. The geochemieal peculiarities of the Volga catchment area were responsible for discontinuity (disjunction) of the geographic range (area of distribution) of this species.