Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
40
4
2004
Biodiversity of the Wetland Complex of the Danube Delta within the Boundaries of Ukraine and a Forecast of Its Changes at the Implementation of the Project of Shipping through the Biosphere Reserve
19
10.1615/HydrobJ.v40.i4.10
T. A.
Kharchenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Based on the analysis of the data on dynamics of saprobiological parameters, species composition, numbers and biomass of hydrobionts of macrozoobenthos, zooplankton, periphyton and zoophytos, it is shown that the aquatic ecosystem of the Danube water bodies lost its ecotone function. At present the borders of the "river - sea" aquatic ecotone have been shifted towards the Kiliya delta extension, and are located on the seashore. These borders mostly coincide with those of the strictly protected zone of Danube Biosphere Reserve. The idea to organize the large-capacity shipping across the aquatic and terrestrial complex of the biosphere reserve should be considered unpromising and ungrounded from the viewpoints of fundamental science, international law, and shipping practice.
Ciliata (Protista, Ciliophora) of Epiphyton of Higher Aquatic Plants in a Small River
17
10.1615/HydrobJ.v40.i4.20
R. V.
Babko
Sumy State University, Sumy, Ukraine
T. N.
Kuzmina
Sumy State University, Sumy, Ukraine
The species composition and quantitative indices of development of epiphytic Ciliata occurring on various species of higher aquatic plants, including Ceratophyllum demersum L., Typha latifolia L., Lemna minor L., and Spirodela polyrrhiza L., in the Strelka river (the Dnieper river basin) were investigated. Calculations of the quantitative indices of development of Ciliata per unit volume of their vital space made it possible not only to compare the structural and functional characteristics of their assemblages occurring in the fouling of various species of higher aquatic plants, but also to compare them with analogous indices registered in water column and bottom sediments. The highest quantitative indices of development, and also the highest functional activity were characteristic of Ciliata occurring on C. demersum characterized by the most complicated spatial organization. The contribution of epiphytic Ciliata to the total decomposition performed by Ciliata of the main ecological groups may account for 44%.
On Seasonal Dynamics of the Biomass of Phytoplankton in the Volga Reservoirs
7
10.1615/HydrobJ.v40.i4.30
V. N.
Pautova
Institute of Volga Basin Ecology of the Russian Academy of Sciences Tol'yatti, Russia
V. I.
Nomokonova
Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok; and Institute of Ecology of the Volga Basin, Russian Academy of Sciences, Tolyatti, Russia
Results of the study suggest that the Ivankovo, Kuybyshev, and Saratov reservoirs of the Volga river cascade differing in their morphometric and hydrological characteristics were closely similar in seasonal dynamics of chlorophyll a content.
Control and Regulation of Anthropic Contamination of Water Bodies in terms of the Indicator Indices of the Biota
16
10.1615/HydrobJ.v40.i4.40
I. N.
Zalicheva
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
I. V.
Volkov
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
N. K.
Shustova
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
V. S.
Ganina
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
L. P.
Vlasova
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
S. P.
Kitayev
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
V. I.
Kukharev
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
A. V.
Ryabinkin
Northern Scientific-Research Institute of Fishery, Petrozavodsk State University, Institute of Aquatic Problems of the North, Institute of Biology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, Russia
T. A.
Chekryzheva
Institute for Biology of Inland Waters RAS, Settl. Borok, Nekouz District, 152742 Yaroslavl Region, Russia
Comprehensive studies on the Kenti-Kento lake-river system (Kareliya) subjected to the long-term influence of sewage of the Kostomuksha Mining Complex made it possible to reveal changes in the functional and structural parameters of the main trophic links of the biota in terms of the gradient of its contamination. Data on the functional state of the fish fauna are rather reliable in evaluating and predicting the influence of sewage of the iron-ore industry on aquatic ecosystems.
Sensitivity of Marine Heterotrophic Bacteria to the Influence of Ultraviolet Radiation
7
10.1615/HydrobJ.v40.i4.50
O. A.
Stepanova
Institute of Biology of the Southern Seas, National Academy of Sciences of Ukraine, Sevastopol, Ukraine
It has been found that the sensitivity of heterotrophic bacteria of the Black Sea to the influence of ultraviolet (UV) radiation varies from season to season. It has been shown that its dynamics are conditioned by changes in the intensity of UV radiation, which depends on seasonal dynamics of the total solar isolation which increases in summertime. The highest tolerance of heterotrophic bacterioplankton for UV radiation was registered in summer and autumn. The author hypothesized that the tolerance of marine bacteria for UV radiation is conditioned by their seasonal adaptation to the increase in the intensity of the background UV radiation, and also by seasonal substitution of UV tolerant species for UV sensitive ones.
Microbiological Processes of Methane Transformation and Organic Matter Decomposition in Bottom Sediments of the Reservoirs of the Volga and Kama Rivers
6
10.1615/HydrobJ.v40.i4.60
A. N.
Dzyuban
Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok, Russia
The complex of microbiological processes of carbon cycle in various types of bottom sediments of the reservoirs of the Volga and Kama rivers was investigated. The processes of methane formation, oxidation, and release were studied. The role of the processes of methane cycle in organic matter decomposition depending on the environmental conditions, on the geographic dislocation of reservoirs, and on the composition of bottom sediments was revealed.
Symbiotic Microflora Associated to the Surface of the Plerocercoid Ligula intestinalis (L.) (Cestoda, Pseudophyllidea)
8
10.1615/HydrobJ.v40.i4.70
G. I.
Izvekova
Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok, Russia
N. A.
Lapteva
Institute of Biology of Inland Waters Russian Academy of Sciences Borok, Russia
It was shown that the bacteria secreting proteolytic enzymes into the environment are associated with the digestive-transport surface of L. intestinalis to a various degree. The total number and biomass of these bacteria decrease with an increase of the strength of association of bacteria with the parasite's surface. Some portion of the washed-off bacteria release their proteolytic enzymes into the medium; these enzymes are active within a wide pH range.
Role of the Trophic Structure of Aquatic Ecosystems of the North-West of Russia in Mercury Accumulation in Fish
11
10.1615/HydrobJ.v40.i4.80
I. K.
Stepanova
Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl' Region, Russia
V. T.
Komov
Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl' Region, Russia
It was established that development of the heterotrophic part of planktonic assemblages and a decrease in a relative part of biomass of primary producers and macrozoobenthos lead to increased accumulation of mercury in fish as the final link in the trophic chain.
Peculiarities of Metabolic Processes in Fish under the Influence of Sublethal Copper and Zinc Concentrations
7
10.1615/HydrobJ.v40.i4.90
V. F.
Kovalenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Sublethal concentrations of copper (0.03 mg/L and 0.10 mg/L) and zinc (0.3 mg/L and 1.0 mg/L) at temperatures 5°C, 15°C, and 25°C change the direction and intensity of metabolic processes in carp yearlings. These effects were evaluated by shifts in the oxygen consumption intensity, carbon dioxide elimination, and ammonia excretion. The responses observed are interpreted as the consequences of stimulation of anaerobic processes and increased expenditures of protein as an oxidative substrate.
Multivariate Approach to the Analysis of Model Data, by the Example of Aquatic Objects
9
10.1615/HydrobJ.v40.i4.100
L. F.
Serdyutskaya
Institute of Problems of Modeling in Power Engineering, Kiev, Ukraine
The results of simulating the processes of nitrogen circulation on the example of the Kremenchuk (Kremenchug) Reservoir were analyzed using the methods of multilevel analysis of information (visualization). A phase-plane depiction of the 30-year simulated cycle was obtained; the latter reflects the ecosystem's multilevel dynamics as a whole on the plane of the first two factors.
Far Eastern Species of Planktonic Crustaceans in the Volga−Don Region
4
10.1615/HydrobJ.v40.i4.110
T. P.
Shevlyakova
State Research Institute of Lake and River Fisheries, Volgograd Branch, Volgograd, Russia
Two new Far Eastern species of planktonic crustaceans (Crustacea) of the family Sididae have been found for the first time in the reservoirs and floodplain lakes of the Volga and Don rivers. Data on their numbers, biomass, and distribution are provided.
Anthropogenous Changes of the Water Salinity Pattern in Rivers of the Upper Ob' Catchment Area
12
10.1615/HydrobJ.v40.i4.120
G. K.
Parfenova
Tomsk State University, Tomsk, Russia
Data of long-term hydrochemical observations on rivers of the upper Ob' catchment area (West Siberia, Russia) in various periods of the 20th century (1954−1993) are generalized and discussed. Changes of the ion-salt composition of waters (ions ÍÑÎ3−, SO42−, Cl−, Ca2+, Mg2+, Na++K+, and total ions) under the impact of industrial effluents, at different volumes of annual runoff, debits, and in different phases of the hydrobiological regime are demonstrated.