October 2015, № 10 (185)

Solovyh G.N., Vinokurova N.V., Donskova S.A. MACROPHYTES IN THE STRUCTURE OF FORMATION OF THE URAL RIVER ECOSYSTEMMacrophytes are the one of the main objects of bioindication aquatic's ecosystems, since they are environmental component. This indicates to necessity studying of the floristic composition of plant community and its dynamics in conditions of anthropogenic impact. All the plants refer to flowered plants of the two classes — Liliopsida and Magnoliоpsida in the flora of macrophytes of the Ural river. Was studied the species diversity of macrophytes and their systematic affiliation. Were identified the main ecological groups of aquatic macrophytes. The most numerous ecological group are hydrophytes, most of which are represented by a group of submerged, rooting hydrophytes. The least numerous group among them are hydrophytes, submerged, rooting. The authors for the first time provide comparative data on floristic diversity of the studied stations in the middle reaches of the Ural river in the Orenburg region with previously obtained data on the flora of water ecosystems of the Orenburg TRANS-Urals and the Orenburg region: the group of hygrophytes prevails in general among plants in the phytocenoses of the Orenburg region. Species richness and dominance of macrophytes on the Ural river in the Orenburg region in 2009 was represented by 10 species, while in 2013 17 species of macrophytes with different levels of species richness and dominance. As a dominant ecological group of macrophytes was hydrophytes not rooting, exclusive dominance was characterized by the aquatic plant Ceratophyllum demersum, which acted as dominant at 8 stations.Key words: macrophytes, hydrophytes, hygrophytes, helophytae, the index of species richness, index of dominance.

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About this article

Authors: Solovyh G.N., Vinokurova N.V., Donskova S.A.

Year: 2015

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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