CHARACTERISTICS OF PLANKTONIC ALGAL COMMUNITY IN WINTER IN LAKE WULIANGSUHAI

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1 43 * cell /L COD DOI /j. hjgc CHARACTERISTICS OF PLANKTONIC ALGAL COMMUNITY IN WINTER IN LAKE WULIANGSUHAI Yu Linghong Zhang Xiaoya Li Weiping Li Xing 2 Xu Jing Xue Ye Li Guidi. The College of Environment & Energy Resources Inner Mongolia University of Science & Technology Baotou 0400 China 2. Inner Mongolia Engineering Research Center for Water-Saving Agriculture Inner Mongolia Normal University Hohhot China Abstract In order to study the characteristic of planktonic algae community in winter in Lake Wuliangsuhai a survey was carried out in Lake Wuliangsuhai about the community structure of phytoplankton and water environment status from november 202 to february 203. The investigation results indicated that there were 66 genera in 8 phylum of phytoplankton in 32 water samples collected among which there were 20 genera in Chlorophyta 8 genera in Bacillariophyta 6 genera in Cyanophyta 6 genera in Euglenophyta 2 genera in Cryptophyta 2 genera in Pyrrophyta Chrysophyta and Xanthophyta edch genera. The phytoplankton population of Lake Wuliangsuhai in winter is higher the average number of phytoplankton is cell /L. The supenor genus were Scenedesmus Chamydomonas Schroederia Ankistrodesmus falcatus Cyclotella Synedra Fragilaria Navicula Nitzschia Euglena Phormidium Raphidiopsis and Merismopedia. According to the determination of each index indicated that the water quality was in moderate-eutrophication levels and part of the samples in heavy eutrophication state in winter of Lake Wuliangsuha. Related analysis showed that the phytoplankton quantity was positively correlated with water temperature and negatively correlated with transparency COD. Keywords planktonic algae community structure Lake Wuliangsuhai phytoplankton 2-4 * E

2 44 Environmental Engineering 40 36' ~ 4 03' 08 43' ~ 08 57' 30 km 2. 5 ~ 3 m ~ 3. 0 m. 5 m km mm 502 mm 52 d I2 J Fig. L L5 N3 O0 Q8 Q0 S6 V3 GPS 2. 2 L 0. 5 m 2 Multi340i ph DO WT SD TN TP NH + 4 -N COD NO - 3 -N NO - 2 -N 5 4 g 6 g 00 ml 48 h 30 ml 0. ml ± 5% 7- Fig. 2 Water environment functional diagram of Lake Wuliangsuhai 2 Distribution map of sampling sites in Lake Wuliangsuhai

3 N /P ~ 6. 0 ph ~ J 7 NH + 4 -N COD TN TP NO - 3 -N NO - 2 -N 0 TN TP I2 L5 J I2 L5 TN TP Table / V TN ~ 0. 3 TP. 3 ~ 5 6 SD TN TP O0 TN TP I2 J L L5 Physical and chemical factors of water environment at various sampling sites in Lake Wuliangsuhai ph SD / m / m ρ NH + 4 -N / mg L - ρ COD / mg L - ρ TN / mg L - ρ TP / mg L - ρ NO - 3 -N / mg L - ρ NO - 2 -N / mg L - I J L L N O Q Q S V < 0. > 6. 0 > % % % 9. 09% Fig. 3 The proportion of phytoplankton species in Lake Wuliangsuhai 3. 03%. 52% V3 S6 Q I2 N3 O0 L5 O cell /L 0 6 cell /L ~ cell /L cell /L V cell /L J

4 46 Environmental Engineering Table 2 2 Composition of phytoplankton species in Lake Wuliangsuhai Chamydomonas Melosira Oscillatoria Euglena Chlorphyta Coleochaete Chlorogonium Schroederia Chodatella Chlorella Ankistrodesmus Ankistrodesmus falcatus Oocystis Selenastrum Crucigenia Pediastrum Scenedesmus Coelastrum Actinastrum Ulothrix Staurastrum Closterium Cosmarium Tetraspora Bacillariophyta Cyclotella Cyanophyta Diatoma Synedra Cocconeis Fragilaria Tabellaria Stauroneis Navicula Gomphonema Cymbella Achnanthes Surirella Epithemia Nitzschia Nitzschia pungens Pinnularia Asterionella Anabeana Microcystis Merismopedia Phormidium Chroococcus Coelosphaerium Dactylococcopsis Nostoc Aphanizomenon Spirulina Gloeotrichia Hammatoidea Raphidiopsis Cylindrospermum Anabaenopsis Euglenophyta Phacus Cryptomonas Cryptophyta Chroomonas Gymnodinium Pyrrophyta Glenodinium Synura Chrysophyta Tribonema Xanthophyta 4 Phytoplankton density in each sample point Tribonema 3. 4 SPSS 7. 0 Pearson 3 3 COD Fig TN TP Scenedesmus acuminatus Sce. V Cavinatus Sce. oblipuus 2 Chamydomonas Schroederia Ankistrodesmus falcatus 8 66 Cyclotella Synedra % % Fragilaria Navicula Nitzschia % Phormidium Raphidiopsis Merismopedia Euglena Tabellaria Cryptomonas Ovata 3 COD Synura V3

5 47 Table 3 3 The phytoplankton quantity and physicochemical index correlation analysis table of Lake Wuliangsuhai ph TN TP COD NH 4 + -N NO3 - -N NO2 - -N ph TN TP COD NH 4 + -N NO3 - -N NO2 - -N * * ** ** * * ** * ** ** ** ** ** ** * * * ** J M D J.. 2. M M. 2. J M J. J D J M. J D. J J ylh0730@ 63. com J

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