Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
41
5
2005
Some Structural and Functional Peculiarities of the Ecosystems of the Main Mountain Tributaries of the Danube River Basin
3-7
10.1615/HydrobJ.v41.i5.10
M. I.
Cheredarik
Chernovtsy National University, Chernovtsy Regional Soviet of the Ukrainian Society of Nature Conservation, Ukraine
V. I.
Korolyuk
Chernovtsy National University, Chernovtsy Regional Soviet of the Ukrainian Society of Nature Conservation, Ukraine
It has been found that hydrological peculiarities of some mountain tributaries of the Danube River, including the Prut, Siret, and Cheremosh rivers, are responsible for a rather low primary production. In all seasons decomposition predominated over production. Only in some cases, the index of the intensity of self-purification (A/R) was higher than 1 (1.05−1.10). For the most part phytoplankton net production was characterized by negative values, which testifies that allochthonous organic matter was of considerable importance in the energetic supply of the ecosystem.
Macrophytes of the Cooling Pond of the Chernobyl Nuclear Power Station
8-13
10.1615/HydrobJ.v41.i5.20
O. I.
Nasvit
Institute of the Problems of National Security, Soviet of National Security and Defense of Ukraine, Kiev, Ukraine
T. N.
Dyachenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev
Results of the study of macrophytes of the cooling pond of the Chernobyl NPS are presented. The floristic and cenotic composition of higher aquatic vegetation, the area of thickets, the storage of the phytomass and its production, and the distribution of vegetation of various ecological groups were determined. The production of green filamentous algae was assessed.
Forming of Biofouling on Artificial Substrates of Systems for Tertiary Aftertreatment of Sewage Waters
14-27
10.1615/HydrobJ.v41.i5.30
I. V.
Grib
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Tertiary aftertreatment (afterpurification) of sewage water for removing biogenic admixtures (organic carbon, mineral forms of nitrogen and phosphorus) can be carried out at artificial year-round-functioning biosystems developed on soft fibrous filler. The latter are made out of synthetic fibrous scraps (kapron, polyamide) serving as a substrate for organisms utilizing organic matter.
The Role of Hydrodynamic Current "Distortion" in Distribution of Abundant Fouling Species under Conditions of a Diversion Tunnel
28-42
10.1615/HydrobJ.v41.i5.40
A. V.
Moshchenko
Institute of Marine Biology of Far-Eastern Branch of Russian Academy of Sciences, Vladivostok, Russian Federation
A. Yu.
Zvyagintsev
A.V. Zhirmunsky Institute of Marine Biology of the Far East Branch of the RAS, 17, Palchevsky St., Vladivostok 690041, Russia
It has been shown that under conditions of the water diversion tunnel the maximal biomass of the majority of abundant fouling species (attached or having sedentary mode of life) is confined to sites of greatest hydrodynamic distortion of the water flow, such as eddy zones, areas of local concentration of shearing stress etc. Thus, there is observed a distinct differentiation of different species relative to a degree of this distortion, and the role of passive settling (sedimentation) is obvious in formation of the distribution of some abundant fouling species.
Metabolic Mechanisms of Relationship between Higher Aquatic Plants and Water Bloom Forming Blue-Green Algae
43-55
10.1615/HydrobJ.v41.i5.50
Intensive development of higher aquatic plants in continental water bodies is responsible for the increase in the content of polyphenols dissolved in water, which results in the decrease in the numbers of blue-green algae in plankton communities. Under aerobic conditions oxidation of polyphenols to appropriate quinones results in the increase in their biological activity. Changes in the structure of phytoplankton are conditioned by the difference in the response of various groups of algae to the influence of metabolites of higher aquatic plants.
Growth and Functioning of Some Plankton Algae under Conditions of Mixed Cultivation
56-70
10.1615/HydrobJ.v41.i5.60
The interrelation between some species of blue-green and green algae under conditions of mixed cultivation was investigated. Growth interaction between algae depends on the stage of their development. The species composition and physiological state of algae are responsible for either inhibition or stimulation of the growth and photosynthesis of mixed cultures.
Detritophagous Fishes as Bioameliorators in Regulated Systems for Cultivation of Aquatic Animals
71-78
10.1615/HydrobJ.v41.i5.70
Adaptive capacity of goldfish (Carassius auratus gibelio Bloch) for utilization of detritus, which is formed during cultivation of aquatic organisms in recirculating systems, and the influence of the detritus-containing diet on fish metabolism were studied. It has been found that feeding of fishes exclusively on detritus containing predominantly plant debris has adverse effect on the reproductive system and index of growth of goldfish. Exclusive feeding on detritus disrupts protein and carbohydrate metabolism with subsequent energy deficiency (ATP, ADP) affecting both body growth and protein contents in tissues. It has been stated that the most efficient method for optimization of vital activity processes in detritus-consuming fishes, being the sediment destructors, would be introduction into the system of additional food balanced by basic nutrients and caloric value.
Assessment of Toxicity of Waters in Small Rivers of the City of Chernovtsy Polluted by Various Sources (Using Biotesting with Daphnia longispina O. F. Müller)
79-86
10.1615/HydrobJ.v41.i5.80
S. B.
Grytsyuk
Chernovtsy (Chernivtsi) National University, Chernovtsy, Ukraine
S. S.
Rudenko
Chernovtsy (Chernivtsi) National University, Chernovtsy, Ukraine
A comparative analysis of test reactions of Daphnia longispina Müll. to the water taken from small rivers near various pollution sources in the city of Chernovtsy has been performed. As demonstrative indicators were used the amount of parthenogenetic eggs, numbers of living and dead offsprings, number of dead females, number of females with abortive eggs, and amount of the latter. The most sensitive indicators for testing of river water toxicity were selected and by means of these; the most dangerous pollution sources were determined.
Dynamics of Strontium-90 and Cesium-137 Content in the Water of the Water Bodies of the Exclusion Zone of the Chernobyl Nuclear Power Station
87-96
10.1615/HydrobJ.v41.i5.90
M. I.
Kuz'menko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
V. V.
Beliayev
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev
A degree of radioactive contamination of the water was assessed in the water bodies of the exclusion zone of the Chernobyl NPS. They included Lake Glubokoye, Lake Dalekoye, the Krasnenskaya old riverbed of the Pripyat river, the cooling pond of the Chernobyl NPS, and the Pripyat river within the town of Chernobyl. Dynamics of 90Sr and 137Cs content in the water of the above mentioned water bodies were determined in 1989−2003.
Damage to Chromosomes in Cells of Oligochaetes Stylaria lacustris in Water Bodies of the Chernobyl NPP Exclusion Zone
97-101
10.1615/HydrobJ.v41.i5.100
V. G.
Tsytsugina
Institute of Biology of the Southern Seas, National Academy of Sciences of Ukraine, Sevastopol, Ukraine
D. I.
Gudkov
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine
V. P.
Gorbenko
National Scientific Enterprise 'Chernobylskiy Radioekologicheskiy Tsentr' (Chernobyl Radioecological Centre), Ministry of Ukraine for Emergencies and Protection of Population against Aftermaths of the Chernobyl Accident, Chernobyl, Ukraine
Results of studies on chromosome damages in cells of Stylaria lacustris (Oligochaeta) from Lake Azbuchin located in the exclusion (alienation) zone of the Chernobyl Nuclear Power Plant (NPP) in 2001 are presented. The data obtained were compared with results obtained in 1991 and 1993. It has been shown that the level of chromosome mutagenesis in cells of this oligochaete did not lower for the period after the Chernobyl accident.
Adsorption of Heavy Metals by Bottom Sediments at the Presence of Humic Substances
102-117
10.1615/HydrobJ.v41.i5.110
A. V.
Zubko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
I. B.
Zubenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
P. A.
Malinovskaya
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Results of studying adsorption of some heavy metals (Cu2+, Cr3+, Zn2+, Pb2+) by bottom sediments and montmorillonite at the presence of humic substances are generalized. Peculiarities of influence of complexation and pH on the adsorption of metals by these sorbents were analyzed. It has been shown that the formation of complex compounds with humic and ful vic acids causes a decrease in adsorption of the metals under study.
Influence of Environmental Factors on the Carbohydrate Metabolism Regulation in Purple Ramshorn Snail (Planorbarius purpura: Mollusca, Pulmonata, Bulinidae)
118-124
10.1615/HydrobJ.v41.i5.120
A. P.
Stadnichenko
Ivan Franko Zhytomyr University Zhytomyr, Ukraine
G. Ye.
Kyrychuk
Zhytomyr Ivan Franko State University Zhytomyr, Ukraine
K. V.
Taran
Zhitomir (Zhytomyr) State Pedagogical Institute, Zhitomir, Ukraine
The effect of ammonium nitrate (2000, 4000, 6000 mg/L) upon the glucose content in hemolymph of Planorbarius purpura was studied under normal conditions (Kroshenka River, Zhytomyr) and under the influence of complexes of unfavorable abiotic (oxygen deficiency in water, the increased radioactivity level of bottom sediments, acid reaction of the environment) and biotic ("water bloom", trematode infection) factors of the environment.