Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
36
4
2000
Peculiarities of the Development of Phytoplankton in the Upper and Lower Reaches of the Regulated River (on the Example of the Dnieper River)
12
10.1615/HydrobJ.v36.i4.10
L. A.
Sirenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, 12, Pr. Geroyev Stalingrada, 04210 Kiev, Ukraine
A. V.
Kureyshevich
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
V. A.
Medved'
Institute of Hydrobiology National Academy of Sciences of Ukraine Kyiv, Ukraine
It has been found that in the upper reaches of the river the number of algal species and chlorophyll α concentration were higher, whereas the physiological state of algae (based on Margalef index) was better than related indices registered in the lower reaches of the river. These indices correlated with the pH, transparency of water, and content of dissolved oxygen in water.
Comparative Characteristics of Zooplankton of the Dnieper Tributaries
19
10.1615/HydrobJ.v36.i4.20
G. V.
Parchuk
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
P. D.
Klochenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
The taxonomic composition and quantitative development of zooplankton were studied in 15 tributaries of the Dnieper river. Comparative studies on zooplankton found in different watercourses were carried out using Shannon index of species diversity and coefficients of community by Srensen and Sörensen-Czekanovski (Cekanovsky). Saprobic indices calculated in terms of the indicator species of zooplankton suggest that the majority of watercourses studied can be assigned to the β-mesosaprobic zone of pollution.
Bacteria of the Genus Rhodococcus Accompanying Green Algae in Nature and under Conditions of Laboratory Cultivation
10
10.1615/HydrobJ.v36.i4.30
Ye. V.
Borisova
N.G. Kholodny Institute of Botany, NAS of Ukraine,
2 Tereshchenkovskaya Str., Kiev 01004, Ukraine
T. M.
Nogina
D.K. Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Kiev, Ukraine
The species composition of bacteria of the genus Rhodococcus isolated from the algal samples taken in nature, as well as from the cultures of halophilous, freshwater, and aerophilous green algae, was studied. It has been found that the isolated strains of the genus Rhodococcus belong to the species Rhodococcus erythropolis, R. luteus and R. maris. Some species of the genus Rhodococcus were found to be associated with the definite genera of algae, their habitats and conditions of cultivation. The data obtained suggest that bacteria of the genus Rhodococcus incorporated into natural algal and bacterial communities continue to act as accompanying organisms under conditions of prolonged laboratory cultivation and in storage in collections.
Marine Hydrobiological Investigations of the National Academy of Sciences of Ukraine in the Nineties of 20th Century. The Shelf and Water Bodies Adjacent to the Black Sea
20
10.1615/HydrobJ.v36.i4.40
Yu. P.
Zaitsev
Odessa Branch of the Institute of Biology of the Southern Seas National Academy of Science of Ukraine, Odessa Division of the Southern Research Institute of Marine Fisheries and Oceanography, Odessa, Ukraine
Contemporary scales of mass phytoplankton development, decrease of water transparency, reduction in bottom macrophytes biomass, seasonal hypoxia on the northwestern shelf, mass mortality among benthic invertebrates and fish, unintentional and unpredictable introduction of harmful exotic species, sharp reduction in biodiversity of marine organisms, drastically diminished resources of economically important marine organisms - all that testify to the peak of man-induced impact on the Black Sea. International cooperation (for example, within the framework of the Black Sea Environmental Programme, EROS Programme) is a promising way for solving ecological problems that have the transboundary character. Marine hydrobiological institutions of the Ukrainian Academy of Sciences are active contributors to their implementation.
Hydrobiological Research of the Dniester: Results, Problems and Ways of Their Solving
11
10.1615/HydrobJ.v36.i4.50
L. V.
Shevtsova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine; Kyiv University of Management and Business
Major works on hydroecology of the Dniester and its physical-geographical characteristics are discussed. The main attention is paid to anthropogenic changes in the Dniester ecosystem, in particular consequences of the exploitation of the reservoir built on the river and the Dubossary hydroelectric station. The ways of solving hydrobiological and transboundary problems are proposed.
Management of Aquatic Ecosystems as a Promising Direction in Ecological Hydrology
9
10.1615/HydrobJ.v36.i4.60
Conditions and demands for scientifically grounded management of the state of aquatic ecosystem and water quality are formulated. Examples are given of effective implementation of the developed methodology and methodical base of management on the Ukrainian water bodies having regulated water regime.
Problems and perspectives of ichthyological research in Ukraine
19
10.1615/HydrobJ.v36.i4.70
N. Yu.
Evtushenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
The basic problems and main directions of ichthyological research in Ukraine are discussed in the near and long-term perspective. The article proves the expediency of concentrating efforts on studies related to the role of ichthyofauna in mechanisms of the aquatic ecosystem functioning, its stability under natural and anthropogenic conditions, designing of the prognosis theory for the ichthyofauna state, elaboration of ecological and physiological principles for improving conditions of artificial and natural breeding of fish with the aim of preservation of fish gene pool and biological diversity, and increase in the fish productivity of reservoirs.
Natural Populations of Blue-green Algae as Producers of Biologically Active Substances (BAS)
7
10.1615/HydrobJ.v36.i4.80
Yu. A.
Kirpenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine; Institute of Pharmacology and Toxicology, Academy of Medical Sciences, Kiev, Ukraine
A. V.
Parshikov
Institute of Hydrobiology, National Academy of Sciences of Ukraine; Institute of Pharmacology and Toxicology, Academy of Medical Sciences, Kiev, Ukraine
The biological active substance from the biomass of natural populations of Cyanophyta with predominance of Microcystis aeruginosa Kuetz. emend. Elenk. characterized by high vitality has been obtained. It was further refined and separated into 5 fractions with their molecular weight [measured in a.m.u. (atomic mass unit) or Dalton) varying from 15 to 70 kDa. The chemical nature and original structure of these substances have been determined. The critical toxicity level of the substances has been estimated using peroral, peritoneal and intracerebral ways of introduction into an organism. It has been shown that the biological active substance is characterized by cardiotropic, neurotropic, cytotoxic, antiturnoural, antimicrobial effects, which makes it possible to plan its therapeutic use.
Dynamics of Activity of Hydrolases, Level of Protein and Titer of Lectine in Trout Embryo Under Effect of Pathogenic Fungi
9
10.1615/HydrobJ.v36.i4.90
O. N.
Davydov
I. I. Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, Kiev, Ukraine
L. Ya.
Kurovskaya
Institute of Zoology National Academy of Sciences of Ukraine Kyiv, Ukraine
I. A.
Balakhnin
I. I. Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Periods of rise and decrease of activity of hydrolases and content of protein and lysozyme are observed from the moment of fertilization of spawn of Donaldson's trout until the appearance of larvae. The dynamics of proteolytic and lipase activities in healthy embryos and those infected by saprolegnia fungi (Saprolegniomycota) reveal reverse correlation. As for amylolytic and phosphatase activities, correlation coefficients are not significant, and a positive correlation was found for the content of lysozyme. The data obtained testify to negative influence of saprolegnia fungi on the development of trout during embryogenesis.
The Runoff of Total Suspended Matter of the Dnieper and the Southern Bug into the Black Sea
7
10.1615/HydrobJ.v36.i4.100
L. A.
Zhuravleva
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
A. A.
Morozova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
The value of total suspended matter runoff of the Dnieper and Southern Bug rivers flowing into the Black Sea undergoes considerable changes when passing their estuarine offshore (Dnieper-Bug liman), as it has been shown by long-term observations. The average annual value of the runoff is 940.4 tons.
A Method of Ecological Assessment of the Surface Water Quality Based on Fuzzy Logic
11
10.1615/HydrobJ.v36.i4.110
E. L.
Zvenigorodskiy
Engineering Ecology Center at Technical University, Vinnitsa; and Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
The automated ecodiagnostics of the Dnieper reservoirs has been carried out based on the hydroecological monitoring results and Fuzzy Sets theory. The predominance of transition and critical states of the Kiev reservoir were found during this work.
The Influence of Water Regime on the Quantitative Indices of Development of Higher Aquatic Vegetation of Floodplain Water Bodies of the Estuarine Section of the Dnieper River
10
10.1615/HydrobJ.v36.i4.120
G. A.
Karpova
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
The external water exchange of floodplain water bodies of the estuarine section of the Dnieper river is the main characteristics of their regime related to operation of the Kakhovka Hydro-Electric Power Station. The interrelation between the quantitative indices of development of higher aquatic vegetation of these water bodies and their external water exchange was established. In the studied water bodies, the specific production of higher aquatic vegetation and area overgrown with higher aquatic plants decrease with increasing the period of external water exchange. External water exchange for external water exchange, the area overgrown with higher aquatic plants in small water bodies is larger than that in large and medium water bodies.