Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal.2016. № 4(20). P. 32—44
03.00.00 BIOLOGICAL SCIENCES
UDC 574.5(470.12)
Philippov Dmitriy Andreevich, Candidate of Biological Sciences, Leading Researcher
I. D. Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences Bobrov Yury Aleksandrovich, Candidate of Biological Sciences, Associated Professor
Syktyvkar State University named after Pitirim Sorokin
FLORA OF SMALL RESERVOIRS OF VOLOGDA CITY AND ITS STRUCTURE
Abstract
The article presents the results of the study of 13 small reservoirs of the Vologda city. Vascular macrophytes dominate in the flora (90 species out of 100). The list of the dominating families and genera reflect the semi-aquatic character of the flora. The small number of cryptogamic macrophytes, and low generic and species coefficients prove the unsettled nature of the flora. The comparative analysis of the flora of individual reservoirs with the index of Czekanowski — Sörensen showed their common features. The internal division correlates with the origin of the ponds (remnants of natural systems or anthropogenic reservoirs). The analysis of ecological conditions revealed a significant content of nitrogen in the soil and its alkaline reaction, attributable to the influence of the urban environment. Species of aquatic-swamp ecological-coenotic group regularly dominate in the flora. The high content of nitrogen in the soil led to the increase in the proportion of nitrophilous species. Ecological groups are dominated by hygrophytes, but the flora is mainly formed by hydrophytes. Vegetative-mobile plants typically dominate among the life-forms. A large proportion of monocarpic plants is attributable to anthropogenic disturbed areas. The 4 identified and protected species of the Vologda Region demonstrate a settled life in the considered reservoirs in present conditions.
Key words
Flora, reservoirs, analysis of flora, life-forms of aquatic plants, ecological groups, ecological-coenotic groups, activity of species.
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