Solovyh G.N., Vinokurova N.V., Donskova S.A.
MACROPHYTES IN THE STRUCTURE OF FORMATION OF THE URAL RIVER ECOSYSTEM ^{[№ 10 ' 2015]}
Macrophytes 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.

Solovyh G.N., Vinokurovа N.V., Gоlinskaya L.V.
THE ROLE OF MACROPHYTES IN THE SELF-CLEANING PROCESS OF THE URAL RIVER WATERCOURSES FROM POLYCHLORINATED BIPHENYLS ^{[№ 10 ' 2015]}
The macrophytes serve as a storage of polychlorinated biphenyls (PCBs) entering aquatic ecosystems. There were no identified clear correlations between the concentrations of the studied pollutants in water, sediments and macrophytes, but showed interspecific differences in the accumulation of PCBs in macrophytes. The analysis of the absorption coefficient of PCBs from macrophytes revealed clear differences in the accumulation processes of these pollutants in different species. Found that the most active drives toxicants Ceratophyllium demersum (Kb — 2 967.74), Lemna minor (Kb — 2 933.33), Hydrocharis morsus-ranae (Kb — 1 225.81). Group-specific hubs PCBs can be considered rooting macrophytes, which can act as the main object for diagnostic monitoring of the current ecological status of the Ural River. Probably the removal of this vegetation from the water environment can be used to activate the processes of self-purification and reducing the secondary pollution of PCBs. There is shown that during the growing season is a redistribution of entering the body of water between the components of the ecosystem polychlorinated biphenyls: their content is reduced in water and bottom sediments in autumn, but increases in macrophytes, which contributes to the temporary removal of PCBs from ecotopia, i.e. the migration of PCBs are carried out in the ecosystem of the pond through the chain of "water — macrophytes — bottom sediments". Identification of this fact to identify practical recommendations: to reduce water pollution PCBs should be carried out mowing (removal) of the macrophyte ponds that will prevent the return of contaminants in the ecosystem in the process of withering away.

Solovih G.N., Vinokurova N.V.
HYDROBIOCENOSISMACROPHYTES AND THEIR ROLE IN THE REMOVAL PROCESSES OF POLYCHLORINATED BIPHENYLS FROM NATURAL RESERVOIRS ^{[№ 12 ' 2011]}
Was shown the role of macrophytes in water self-purification of polychlorinated biphenyls. Was determined by the concentration of PCBs in macrophytes growing in the study area, and we calculated the coefficients of biological absorption of PCBs by aquatic plants of different ecological groups in the temporal aspect.

^{[№ 10 ' 2008]}