Yatsenko-Stepanova Т.N.
EVALUATION OF THE ECOLOGICAL STATUS OF SOME FLOODPLAIN LAKES ALONG THE URAL RIVER (ORENBURG REGION) ^{[№ 11 ' 2017]}
The review contains the basic approaches to determining the trophic level in natural water bodies. The article presents the results of ecological status estimation of 9 floodplain lakes along the Ural River. In this study physical, chemical, biochemical and biological characteristics were used as ecosystem functioning indicators. Transparency of lakes from 30 to 350 cm, nitrate nitrogen from 0.0 to 4.5 mg/l, phosphorus from 0 to 0.28 mg/l, the intensity of production processes along the lakes varied from 0.22 mg O₂/l•day to 21.53 mg O₂/l•day,biomass up to 15,7 mg/l. An integrated approach to establishing the level of trophicity in the studied reservoirs made it possible to classify lakes Linevo, Dalnee Peschanoe, Rudnichnoe, Muzikantskoe, Kresti as mesotrophic; lakes Belenovskoe, Bolshoe Peschanoe, Lebyazhye, Borodok — to eutrophic water bodies. Shows the need to continue the search for adequate indicators possessing a high degree of informativeness, but the measurement of which would combine with acceptable levels of complexity, accuracy, versatility.

Yatsenko-Stepanova T.N., Nemtseva N.V.
STRUCTURAL ORGANIZATION OF PHYTOPLANKTON COMMUNITY OF PONDS FROM THE POINT OF VIEW OF CONCEPTION OF ASSOCIATIVE SYMBIOSIS ^{[№ 12 ' 2009]}
The analysis of the structural organization of phytoplankton community of ponds revealed its multidimensional and complex integriority at the type of associative symbiosis. Methodical approaches to determine the individual components (master, dominant and associative mikropartnery) involving mathematics apparatus were worked out in this article.

Yatsenko-Stepanova T.N., Nemtseva N.V., Muravieva M.E.
DIATOMS FLORA IN ORENBURG REGION ^{[№ 12 ' 2007]}
The analysis results of systematic structure of Bacillariophyta ponds flora in Orenburg region are given in this article. 320 taxons which have lower rank than genuses, applied to 2 classes, 7 orders, 19 families, 42 genuses are revealed here. The share of department’s representatives in general structure of algoflora in a region is shown. And ecological characteristic of species is given in this work.

Nemtseva N.V., Plotnikov A.O., Yatsenko-Stepanova T.N., Selivanova E.A., Shabanov S.V.
PLANKTONIC COMMUNITY OF UNIQUE HYPERGALLIN AND MESOGALLIN LAKES OF ORENBURG REGION ^{[№ 5 (app.1) ' 2005]}
Specific structure of plankton, represented with limited number of microorganisms, which have low specific variety and specific structure, was determined at research of hypergallin and mesogallin lakes of Orenburg region. Halophilous and halotolerant types of bacteria and algae are dominated in microbiocenose of lakes, protozoan are developed slightly. Got data are important for characteristic of biological variety, structure of planktonic community of hypergallin ponds and decoding of functioning mechanisms of hypergallin ecosystem.

Moshetova L.K., Yatsenko O.Yu., Mizgireva A.P., Borisenko I.F.
MODERN PHARMACOTHERAPY OF ACUTE VASCULAR OBSTRUCTION OF RETINA AND OPTIC NERVE ^{[№ 13 ' 2004]}