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Mongolian journal of Biological sciences

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Contribution to the Knowledge of Phytoplankton of the Tavolzhan Lake, Kazakhstan

A. T. Toleuzhanova
Pavlodar State University named after S. Toraigyrov, Lomova str. 5, Pavlodar, Kazakhstan

Abstract

The article deals with the analysis of phytoplankton of the lake Tavolzhan in Kazakhstan. In the revealed fl ora among algae the diatoms are dominated. The leading genus in the algal fl ora of the lake was Navicula Bory.

Keyword: phytoplankton,plankton,algae species

Introduction

The fl oristic examinations of the uninvestigated territories and regional fl oras, and also particularly important groups of inferior plants are always in the attention of botanists (Akhmetova, 1986). The biological diversity of algae is usually defi ned by means of morphological characters in combination with their ecology and geographical distribution (Vinogradova, 1978). Most of the algae of continental inland waters mainly have unicellular structure, and the cell morphology involves decisive importance for taxonomy. The samples of planktons were collected in the spring and summer of 2006, from the Tavolzhan Lake, which is situated on the right side of the Irtysh River, 75 km to the northeast from Pavlodar city. Taking samples, their analysis and determination are done according to general methods of algological and hydrobiological research (Masyuk et al., 1989; Gollerbah & Polyansky, 1959; Proshkina-Lavrenko, 1951; Lothar, 1980; Tsarenko, 1990). The following species of algae are found in the Tavolzhan Lake. Diatoms: Navicula menisculus Schum. is presented by the nominal species, N. menisculus Schum. (with a variety, N. menisculus var. meniscus (Schum.) Hust., N. protracta Grun., N. gregarta Donk., N. cuspidata Kutz (the latter species is represented with two varieties: N. cuspidata var. ambigua (Ehr.) Grun. and N. cuspidata var. subrostrata Dipp.), N. tuscula (Ehr.) Grun., N. crucicula (W. Sm.) Donk., N. mutica Kutz., N. bacillum Ehr., N. peregrina (Ehr.) Kutz. (with two varieties, N. peregrina var. hankensis Skv., N. peregrina var. minuta Skv.), N. oblonga Kutz., N. salinarum Grun., N. amphibola Cl. (=N. galikii Pant.), N. viridula var. abbreviata Grun., N. viridula Kutz., N. halophila f. subcapitata Ostr., Cymatopleura solea (Breb.) W. Smith., Cocconeis disculus (Schum.) CL., C. pediculus Ehr., C. pediculus var. minutissima Poretzky, Amphora holsatica Hust., A. paludosa W. Sm., Cyclotella comta (Ehr.) Kutz., C. stelligera Cl et Grun., C. planctonica Brunth., C. melosiroides (Kirchn.) Lemm., Rhoicosphenia curvata (Kutz.) Grun., Stephanodiscus dubius (Fricke.) Hust., Diatoma vulgare Bory, D. elongatum (Lyngb.) Ag., D. hiemale (Lyngb.) Heib. (=Odontidium hiemale Kutz.), Mastogloia smithii Thw., M. smithii var. lacustris Grun., Synedra ulns (Nitzsch.) Ehr., S. tabulate (Ag.) Kutz., S. berolinensis Lemm. (=S. limnetica Lemm.), Staroneis anceps Ehr., Gomphonema olivaceum (Lyngb.) Kutz., Rhizosolenia longiseta Zacharias, Nitzschia holsatica Hust., N. gracilis Hantzsch., N. subtilis var. glacialis Grim., N. hantzschiana Rabenh., Bacillaria paradoxa Gmelin (=Nitzschia paradoxa Grim.), Nitzschia tryblionella Hantzsch., N. longissima var. reversa W. Sm. (=N. reversa W. Sm.), N. paleacea Grim. (N. subtilis var. paleacae Grun.,) Epitemia sorex Kutz., Rhopalodia gibba (Ehr.) Mull., Surirella striatula Turp., S. ovata Kutz., Fragilaria intermedia Grun (=F. vaucheriae (Kutz.) Boye), Pinnularia braunii (Grun.) Cl., Rhopalodia gibba (Ehr.) Mull. and Eunotia arcus Ehr. Thus, in the revealed fl ora among algae the diatoms are dominated, among which the leading genus is Navicula. Green algae are assisted as admixture and are represented with one species, Scenedesmus quadricauda (Turp.) Breb. with its variety, S. quadricauda quadricauda. The given specifi c review does not pretend to the whole algofl ora and further studies undoubtedly will enlarge this list.

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