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《Acta Ecologica Sinica》 2005-10
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The regular changes of protozoan community diversity in an artificial lake in Harbin,China

TAN Xiao-Li~(1,2),SHI Xin-Lu~(1,2*),LIU Gui-Jie~1,BAI Xin~2 (1.Harbin Normal University,Harbin 150080,China;2.School of Life Sciences,Hangzhou Normal College,Hangzhou 310036,China;3.Harbin Environment Monitoring Central Station,Harbin 150076,China).  
The changes of protozoan community diversity in an artificial lake of Harbin area in northeast China from March of 2003 to February of 2004 have been studied by using PFU(Polyurethane Foam Unit) method,the characteristics of the protozoan community development with the change of seasons in this typical water located in the northeast of China have been studied.The results showed that a total of 120 species of protozoa has been found during the investigation,including 53 species of mastigophoras taking up 44%,9 species of sacrodinas taking up 8%,and 58 species of ciliates taking up 48%.The regularity of protozoa in the investigation indicated that the amount of phytoflagelates and ciliates was more,but the amount of zooflagelates and sarcodinas was less.Furthermore,Protozoan characteristics and their relationship with water quality have also been analyzed.Protozoan community parameters(species composition,individual abundance,diversity index)varied according to the water quality.The dominant protozoan species were Stentor,Euglena,Euplote and Cryptomonas in this lake,and the dwelling species were Euglena,Halteria,Strobilidium and Cryptomonas all through the year;the diversity index was 1.912~7.473 in three sampling sites during 12 months.The regular decreasing orders of average individual abundance were autumn,summer,spring,winter and the average individual abundance of sampling site 1 was much higher than the other two in the four seasons.
【Fund】: 中国科学院淡水与生物技术国家开放实验室基金资助项目(2002FB09);; 浙江省自然科学基金资助项目(Y304410);; 浙江省动物学重点学科资助项目~~
【CateGory Index】: Q958.1;
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