Journal "Inland Water Biology"

№ 2 за 2001 год

M.I. Gladyshev

Biomanipulation as tool for management of water quality in inland waterbodies.

Papers published in leading international limnological and ecological journals in 1990-1999 are reviewed. Fundamentals of the hypothesis of trophic cascade - biomanipulation "top-down" are given and experimental data, both supporting or contradicting in the hypothesis are analysed. Variants of possible decouplings in a pelagic cascade chain are considered. The role of benthivorous fishes and macrophytes is shown demonstrated. Theoretical and applied recommendations on biomanipulation sering the improvement of water quality in fresh waters are generalised.

O.A. Lyashenko

Taxonomical composition of phytoplankton in the Ivankovo reservoir.

About 480 taxa of algae were found in the phytoplankton of the Ivankovo reservoir. Among them the green, diatom and blue-green algae have the most taxonomic diversity of phytoplankton. The significant similarity of taxonomic composition and indices of quantitative development of algae in three parts of the reservoir is showed. The differences are caused by hydrologic features and different trophic status of the parts.

A.I. Kuzmichev, A.N. Krasnova

Diminutive grasses of sandbars. History of formation and structure of floristic complex of floodplain nanoephemeretum.

The discussion is presented of taxonomic structure and areagenetic features of nanous vascular plants associated with intermittent shallow waters and wet sandbars. They are fragments of the lost and improverished floristic palaeo complex of the Pleocene existing in littorals of the Eastern Europe. Global changes in the natural environment at the end of the Pleocene - beginning of the Pleistocene caused degradation of the ecotope area and the complex reduction howdays. It occurs in few reservoirs with a fluctuating water level, for example in the Rybinsk reservoir and develops fragmentary in natural bodies of water late in summer and early in fall when the water level drops and mass development of few species of this plant group starts at water free parts of the aridal zone.

N.G. Kosolapova

Fauna and abundance planktonik heterotrophic flagellates in small fresh bodies of water.

The abundance and species composition of heterotrophic flagellates from small fresh bodies of water (a loggy lake, a small river and a pond) were investigated. 53 species of flagellates of to 10 orders have been found. Seasonal dynamics flagellates and bacteria abundance in the studied sites is shown. The similarity of abundance and species composition of heterotrophic flagellates of three shallow reservoirs and in small waterbodies and large lakes and reservoirs is discussed.

V.G. Gagarin

Review of free-living nematode fauna from fresh waters of the Russian Arctic and Subarctic.

A list of free-living nematodes found in fresh waters of the Russian Arctic and Subarctic includes 179 species from 9 orders and 28 families. In the Arctic and Subarctic the most diverse nematodes are of families Tobrilidae (24 species), Monhysteridae (18 species), Plectidae (11 species). Common species, wide-spread in fresh waters from equator to the poles make a bulk of the Arctic and Subarctic nematodе fauna.

A.E. Zhokhov

Caspian invader Aspidogaster limacoides (Aspidogastrea, Aspidogastridae) in the Upper Volga: the history of invasion.

The history of Aspidogaster limacoides invasion of the Upper Volga is described. The invasion occurred via two routes: from Kuibyshevsk Reservoir up stream the cascade of reservoirs and through the Moscow canal system. Carp fishes - the parasite facultative hosts - contributed to the spread of aspidogaster. At present A. limacoides is a common parasite of cyprinids in the Upper Volga reservoirs. Its invasion has not exerted a negative effect on the aboriginal fauna.

A.I. Bасаnov, V.N. Stolbunova, I.V. Dоvbnya, N.N. Zhgareva, V.V. Zаkonnov

The animal population of aquatic vegetation in Lake Nero: fauna of some macrophyte associations.

The complex research of fifteen macrophyte associations in Lake Nero has been carried out. The main quantitative characteristics of macrophytes, bottom sediments, zooplankton, zoobenthos and zoophytos are presented. Dominant species of the main ecological groups of the animal population are indicated.

S.I. Genkal, G.I. Popovskaya, N.A. Bondarenko

About morphology and taxonomy of Pliocaenicus costatus (Log., Lupik. et Churs.) Flower, Ozornina et Kuzmina (Bacillariophyta).

Species collected from lakes of the Pribaykalskiy and Zabaikalskiy regions and Chukotka were studied by the electrone-microscope method. It is shown that Pliocaenicus costatus (Log., Lupik. et Churs.) Flower, Ozornina et Kuzmina manifests significant morphological variability. On a basis of the obtained results it is suggested to include all intraspecific taxa of this species into synonymy. The generic features of Pliocaenicus are clarified.

A.P. Mylnikov, Z.M. Мylnikova

The fine structure of amoeboid flagellate Cercomonas metabolicus Mylnikov.

Fine structure of amoeboid flagellate Cercomonas metabolicus is considered. Two heterodynamic flagella begin at the anterior cell end. The root flagellar system consists of the microtubular cone and three microtubular bands. The pyriform nucleus with excentral nucleolus, Golgi apparatus and endoplasmic reticulum are of a common structure. The spherical mitochondria of various shapes contain vesicular cristae. Several microbodies with fine-grained contents and dark condensation occur in cytoplasm. The extrusomes (microtoxicysts) have been found in the cell. The symbiotic bacteria are located beneath the cell surface. The similarity of Cercomonas metabolicus with cercomonads and other amoeboid flagellates is discussed.

A.G. Ochapkin

Composition and ecology of dominant phytoplankton species in streams and reservoirs of the Middle Volga: green algae, euglenoids, cryptomonads, dinoflagellates, chrysomonads and blue-green algae.

Composition and ecology of dominant species of green algae, euglenoids, cryptomonads, dinoflagellates, chrysomonads and blue-green algae were studied in streams and reservoirs of the Middle Volga (the Volga river before construction of the Cheboksary reservoirs, Gorky and Cheboksary reservoirs and their tributaries) different in morphometry and hydrochemical composition. Regularities of seasonal and interannual dynamics of the dominant algae species biomass are characterized in relation to abiotic factors of the environment.

O.A. Lyashenko, N.M. Mineeva, N.Yu. Meteleva, V.V. Solovyova

Pigment characteristics of phytoplankton in the Uglich reservoir.

Plankton pigment characteristics in the Uglich reservoir obtained during 1985-1999 are under consideration. Chl a content that indicates phytoplankton abundance as well as the reservoir trophic status, shows appreciable spatial and temporal variations. The highest Chl in a seasonal cycle is marked during the late summer. Near shore shallows are characterized by increased with boosted Chl all over the observation period. Chl a, pheopigments, and plant carotenoids change similarly. The relative content of pheopigment is typical for fresh waters, pigment ratio E480/E664 testifies to a satisfactory physiological state of algae. Mean seasonal and summer Chl values characterize Uglich reservoir as a mesotrophic one.

V.B. Verbitsky, Ye.A. Koreneva, S.A. Kurbatova, T.I. Verbitskaya

Response of zooplankton to the temperature effect: dynamics of abundance and responses of dominating species.

The response of zooplankton in microcosms the effect of temperature with a step of 5 and 10°С was investigated. Quantitative data on dynamics of abundance and structure of the dominant complex of species depending on nagnitude, duration and orientation of the temperature factor were obtained. The optimum and critical temperature values as well as the temperature regime promoting a rapid increase in a number of dominating species as Daphnia longispina, Ceriodaphnia quadrangula, Bosmina longirostris, Chydorus sphaericus и Thermocyclops oithonoides were determined. The critical temperature value were found for the zooplankton community.

S.N. Perova, G.KH. Shcherbina

Structure of macrozoobenthos in different parts of the Gorky reservoir.

A comparative analysis of the structure of bottom invertebrates community is carried out in the channel and lacustrine parts of the Gorky reservoir in autumn 1995. It is found, that the macrozoobenthos in the channel part can be distinguished by larger species diversity. The highest average biomass was registered in a channel of the lacustrine part. It is shown, that the domestic sewage from large cities influenced significantly an index of saprobity and bottom invertebrates abundance in the channel and littoral zones. The similar parameters on the slope of the channel did not differ reliably. It has been found, that the spreading of zebra mussel biocenosis promoted an increase in biomass of feeding objects valuable for benthophagous fish.

G.I. Izvekova

Ligula intestinalis (Cestoda, Pseudophyllidea): some aspects of plerocercoids carbohydrate metabolism.

The peculiarities of final stages of carbohydrate metabolism in Ligula intestinalis plerocercoids from the body cavity of bream were studied. During in vitro incubation plerocercoids decreased рН of the medium and secreted lactic acid in to the ambient solution. At long incubation the changes of these parameters depended on the contents of glucose in the medium and worms size. The rates of medium pH change and lactate production eventually decline during the incubation. In body cavity wash-out of a bream infected and uninfected by L. intestinalis plerocercoids no significant differences in the contents of lactic acid were found. The relationships in a parasite-host system are discussed in connection with carbohydrate metabolism.

A.M. Andreeva, E.A. Zabotkina

Immune system organs of bream Abramis brama L. in early ontogenesis.

The immune system organs of bream from prelarvae up to fingerling were investigated by hystological methods. It is found that formation of the pronephros finishes in 1-2 days after hatching. A liver and spleen are found for the first time in a one day prelarvae, and a thymus gland - in 14 days after hatching. The thymus gland of a 8-weeks bream larvae has three distinct layers: peripheric, cortical and medullar.

A.I. Kuzmichev, A.V. Slavgorodskiy

About the book "Atlas of flora from waterbodies of the Tyla region" by Shcherbakov A.V.

G.S. Rosenberg, Yu.M. Lebedev

The First All-Russian Conference "Studies of ecologo-geographical problems of nature management to ensure the territory structure and stability in development of oil- and gasfields in Russia. Theory, methods and practicle".

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