[Seasonal variation of phytoplankton community in Xiaojiang backwater area during the preliminary operation stage of the Three Gorges Reservoir].
According to one year's continuous observation on algae in the Xiaojiang backwater area in Three Gorges Reservoir, our group analyzed algae community and its succession in the Xiaojiang backwater area at the beginning of the function of the reservoir. The algae cell density and biomass are the highest in spring and the lowest in winter. The maximal value of cell density is 421.64 x 10(3) cells x L(-1), and the minimal value is 2.06 x 10(5) cells x L(-1); and maximal value of biomass is 39,231.84 microg x L(-1), and the minimal value is 226.17 microg x L(-1). From May 2007 to May 2008, there are 7 phylum, 101 category, 262 genus appeared in the Xiaojiang backwater area, in which 51 categories are Chlorophyta accounting for 50.5%, 22 categories are Bacillariophyta accounting for 21.8%, 18 categories are Cyanophyta accounting for 17.8%, and 4 categories are Dinophyta, 2 categories are Cryptophyta, 3 categories are Euglenophyta, 1 category is Xanthophyta and others. Cryptomonas, Chlorella, Cyclotella, Scenedesmus, Oocystis, Chlamydomonas, Schroederia, Aulacoseira, Stephanodiscus and Fragilaria are familiar categories in the Xiaojiang backwater area. Asterionnella, Aulacoseira, Coelastrunm, Chlorella, Scenedesmus, Aclinastnrum, Dictyosphaerium, Anabaena, Aphanizomenon, Merismopedia, Ceratium, Peridinium and Cryptomonas are the preponderant categories in the Xiaojiang backwater area.
Guo
Jing-song
JS
Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China. guo0768@126.com
Sheng
Jin-ping
JP
Li
Zhe
Z
Gao
Xu
X
Fang
Fang
F
Zhou
Hong
H
D002681:China; D000460:Chlorophyta / Q000254:growth & development; D000458:Cyanobacteria / Q000254:growth & development; D017377:Diatoms / Q000254:growth & development; D004784:Environmental Monitoring; D005618:Fresh Water; D010839:Phytoplankton / Q000254:growth & development*; D045483:Rivers; D012621:Seasons; D014876:Water Pollution / Q000032:analysis*