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F Erchives From f eRCHIVES FISHERIES AND MARINE SERVICE Translation Series No. 3741 Comparative characteristics of phyto- and bacterioplankton of the lake part of the Gorky reservoir by G.M. Lavrent'eva, and A.P. Romanova Original title: Sravniternaya kharakteristika fito- i bakerioplanktona ozernoi chasti Gor'hovskogo vodokhranilishcha From: Izv. Gos. Nauchno-Issled. Inst. Ozern. Rechn. Rybn. Khoz. 95: 61-66, 1974 Translated by the Translation Bureau(jw ) Multilingual Services Division Department of the Secretary of State of Canada Department of the Environment Fisheries and Marine Service Arctic Biological Station Ste. Anne de Bellevue, P.Q. 1976 12 cages typescript DEPARTMENT OF THE SECRETARY OF STATE SECRÉTARIAT D'ÉTAT TRANSLATION BUREAU BUREAU DES TRADUCTIONS MULTILINGUAL SERVICES ?f,Àem DIVISION DES SERVICES CANADA DIVISION MULTILINGUES m -7q) TRANSLATED FROM — TRADUCTION DE INTO EN Russian English AUTHOR — AUTEUR G.M.Lavrent'eva and A.P.Romanova TITLEINENGLISH—TITREANGLAIS Comparative characteristics of phyto- and bacterioplankton of the lake part of the Gorky reservoir TITLE IN FOREIGN LANGUAGE (TRANSLITERATE FOREIGN CHARACTERS) TITRE EN LANGUE ÉTRANGÉRE (TRANSCRIRE EN CARACTÉRES ROMAINS) Sravnitel i naya kharakteristika fito- i bakterioplanktona ozernoi chasti Gorikovskogo vodokhranilishcha REFERENCE IN FOREIGN LANGUAGE (NAME OF BOOK OR PUBLICATION) IN FULL. TRANSLITERATE FOREIGN CHARACTERS, RÉFÉRENCE EN LANGUE ÉTRANGÉRE (NOM DU LIVRE OU PUBLICATION), AU COMPLET, TRANSCRIRE EN CARACTÉRES ROMAINS. lzvestiya gosudarstvennogo nauchno-issledovatel'skogo instituta ozernogo i rechnogo rybnogo khozyaistva REFERENCE IN ENGLISH — RÉFÉRENCE EN ANGLAIS Proceedings of the State Scientific Research Institute of La ke and River Fisheries (GosNIORKh) PAGE NUMBERS IN ORIGINAL PUBLISHER ÉDITEUR DATE OF PUBLICATION NUMÉROS DES PAGES DANS Not given DATE DE PUBLICATION L'ORI.GINAL 61-66 YEAR ISSUE NO. VOLUME NUMÉRO PLACE OF PUBLICATION ANNÉE NUMBER OF TYPED PAGES NOMBRE DE PAGES LIEU DE PUBLICATION USSR DACTYLOGRAPHIÉES 'id Not 95 given 12 REQUESTING DEPARTMENT Environment TRANSLATION BUREAU NO. 1101170 MINISTÉRE-CLIENT NOTRE DOSSIER N° BRANCH OR DIVISION TRANSLATOR (INITIALS) JW DIRECTION OU DIVISION Fisheries and Marine TRADUCTEUR (INITIALES) PERSON REQUESTING Dr. Stophen Hsiao UNEDITED TRA7.15LATION DEMANDÉ PAR For infortnaion only YOUR NUMBER TRADUCTION N'ON REVEZ VOTRE DOSSIER N° 5053.-1 Informal ion souk.sriu.,nt DATE OF REQUEST 30m Itm 76 DATE DE LA DEMANDE 505.200.10.0 (REV. 2/00) 7030-21-020-033 3 DEPARTMENT OF THE SECRETARY OF STATE SECRÉTARIAT D'ÉTAT TRANSLATION BUREAU BUREAU DES TRADUCTIONS . MULTILINGUAL SERVICES DIVISION DES SERVICES DIVISION MULTILINGUES CITY CLIENTS NO. DEPARTMENT DIVISION/BRANCH VILLE N° DU CLIENT MINISTERE DIVISION/DIRECTION Ste Anne de Bellevue, P.Q, 5053-1 Environment Fisheries and Marine BUREAU NO. LANGUAGE TRANSLATOR (INITIALS) N ° DU BUREAU LANGUE . TRADUCTEUR (INITIALES) JUN - 1 1976 1101170 Russian JW LMA From: Izv. gos. nauchno-issled. inst. ozern. i rechn. ryb. khoz (Proceedings of the State Scientific Research Institute of 0 Lake and River Fisheries (GosNIORKh)), vol. 95, pp. 61-66, F— " 0 -A 1974 (USSR) r 2; • 0 pe0 ICI r, n Comparative characteristics of phyto- and bacterioplankton E 2: g of the lake part of the Gorky reservoir UJ .E Ë t, Z) by Lt4 L Cà G.M. Lavrent'eva and A.P. Romanova Id* UDC 581.526.325(47:282.4G) + 576.8(47;282.4G) A study of the microflora of the Volga river, in a section which now 61* forms part of the Gorky reservoir, was begun before the dam at Gorodets was built. The first study dealt with a description of the species composition of phytoplankton (Esyreva, 1945). Intensive studies both of phytoplankton (Priimachenko, 1959, 1960, 1961, 1966; Esyreva, 1967) and of bacterioplankton (Kuznetsov, 1959; Rozanova, 1959; Romanova, 1965; Krasheninnikova, 1960) were conducted in the years after the reservoir was filled. The studies of that period established the most important indexes which determined the productivity of the reservoir in its early stages: the abundance and biomass of phyto- and bacterioplankton, their seasonal and annual dynamics. They also established the main features of the vertical and lateral distribution of the microflora. * The numerals in the right-hand margin indicate page numbers of the original (Tr.). SOS-200-10-31 2. From 1960 to 1968 no systematic observations were conducted of the growth of the primary links in the food chain in the Gorky reservoir. In 1968 the present authors commenced simultaneous studies of phyto- and bacterioplankton as part of a comprehensive fisheries project of Gos- NIORKh which was undertaken for the purpose of compiling a commercial fishing map of the Gorky reservoir. These studies were continued in 1969-70 in the shallows of the reservoir (Lavrent t eva, 1974; Romanova, 1974), and in 1973 the main studies shifted again to the main channel area. The Gorky reservoir, which is a valley-fluvial type of reservoir, has a distinctive lake portion as well. The effect of the backwater is quite noticeable in the area of Krasnyi-on-the-Volga, below Plës, where there is a marked reduction in the rate of current flow and hence reduced mixing of water. In the area of Elnat the reservoir clearly assumes the outlines of a "lake", reveals the beginnings of vertical biontic stratification and increased productivity (Priimachenko, 1966). Yearly changes in the quantity of biomass of the primary links in the food chain, varying with hydrometeorological conditions, are character- istic of all water reservoirs without exception. The amplitude of these fluctuations in the reservoirs must obviously be larger than in natural water bodies, because in years with unfavorable water conditions water consumption increases because of the use of water for irrigation purposes. In years with unfavorable wind conditions the water can be quite agitated, especially in the open deep stretches in the vicinity of the dam, where the waves exceed 2 m in height (Butorin, 1971). In this paper we are comparing the results of phyto- and bacterio- plankton studies which were conducted in the lower parts of the river and lake section of the Gorky reservoir in 1968 and 1973-years with sharply different hydrometeorological conditions. 3. The studies were conducted in July 1968 and beginning of August 1973, which is the most productive period in the Middle Volga area. At the beginning of the survey in 1968 (stations above the town of Près to Yurevets) the water temperature in the reservoir was 19-200 and the water was not agitated, whereas at the mid-point and end of the survey 0 (stations between Yurevets and Gorodets) the temperature dropped 4 and the waves reached a height of 1.5 m. The survey in 1973 was conducted under favorable weather conditions, with water temperature reading of 19 - 210 and practically no water agita- tion due to wind. The phyto- and bacterioplankton specimens were obtained with the aid of Rutner's bathometer on board a semer boat-type research vessel. The water samples were taken at standard channel stations along the reser- voir (depth, 6 - 19 m) from the upper, middle and bottom layers. The final result was reduced to a quantity of the biomass which was expressed in g/m3 . The algae biomass was calculated on the basis of sedimented samples by estimating the number of cells of each individual mass in a Nazhotta* chamber, and the bacterioplankton was determined with the use of membraned ultrafilters stained with erythrosin. In July 1968, at a station above the town of Pl.és,we recorded an 3 algae biomass in the 0 level that was high (8.26 g/m ) in comparison with that of sections farther upstream (Lavrent'eva, 1972). This biomass was comprised of diatoms (Asterionella formosa) and of Pyrrophyta (Cryptomonas ovata). The algae distribution was vertically stratified, both quanti- tatively (see Table) and according to species, with the diatoms predomina- ting at the bottom. In a section below the town of Près the phytoplankton biomass was somewhat reduced and depended on the growth of other diatom species such as Melosira. As was already noted, the weather in the vicinity *Transliterated from the Russian (Tr.). 4. of Yurevets changed drastically; however, in protected bays the "flowering" of colonies of Microcystis was still visible. In the channel the "flowering" was already carried off by the agitation of the water, the algae biomass 3 was very low (0.79 g/m ) with over 50% being comprised of blue-green algae. In the Sokol l sky section the phytoplankton biomass in the channel was even more reduced (see Table) and comprised mostly of Pyrrophyta. At Puchezh and in the vicinity of the dam the biomass became reduced to 0.01 - 3 0.13 g/m and the samples contained only small forms of Protococcaceae. In August 1973 the samples were taken at the same stations as in 1968 (see Table). Under the favorable weather conditions already noted, the picture of phytoplankton growth and distribution was complete47 different. On the whole, the algae plankton biomass increased from a section above the town of Plës in the direction toward the dam. The exceptions were: a) samples taken from the upper level in a section above the town of Plës,where the phytoplankton biomass was greatest and 99.6% was comprised of Mycrocystis aeruginosa. This was due to the fact that our vessel had met up with a "flowering" "batch" on the drift. The sample taken at this station near the bottom level, where the factors of drift are less marked, was relatively devoid of plankton; b) smaples taken at stations where the channel is strongly affected by the Yurevets shallows, which are the largest in the Gorky reservoir (Lavrent t eva, 1974); c) samples taken near the dam at a depth of 4 m, where the phytoplankton biomass occurs in the largest quanti- 3 ties in the lake part, namely 217 g/m (of which 96% is comprised of Mycrocystis aeruginosa).
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