[Algal community structure and water quality assessment on drawdown area of Kaixian waters in Three Gorges Reservoir during winter storage period].
The old town area of Kaixian county was flooded and showed reservoir characteristics after the water level of Three Gorges Reservoir got 172. 8 m in December 2008. The aquatic ecology and nutritional status of Kaixian drawdown area after water storage are still rarely reported. To understand the current water environment and changes in algal community structure of Kaixian drawdown area after 172.8 m water level, the algal composition, abundance, biomass distribution and changes of its sampling spots including Hanfeng Lake were observed twice during winter storage period in January and December 2009. The trends in phytoplankton community structure were analyzed and the water quality assessment of nutritional status was carried out. The results indicated that 6 phylums, 37 genera, 69 species of phytoplankton in total were identified in the two sampling, and the dominant species were Dinophyta and Cryptophyta. The cell density and biomass in December 2009 were lower than those in January 2009. The evaluation results of algal population structure and pollution indicators showed that the nutrition level of Kaixian drawdown area during the winter storage period was mesotrophic to eutrophic type, while diversity analysis result indicated moderate pollution.
Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China. guo0768@126.com
Jing-Song
JS
Guo
Dan
D
Xie
Zhe
Z
Li
Yuan
Y
Chen
Zhi-Yu
ZY
Sun
Yong-Bo
YB
Chen
Man
M
Long
D002681:China; D044785:Cryptophyta / Q000254:growth & development; D004141:Dinoflagellida / Q000254:growth & development; D004784:Environmental Monitoring; D005068:Eutrophication; D010839:Phytoplankton / Q000145:classification* / Q000254:growth & development; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality; D014881:Water Supply / Q000032:analysis*
D014874:Water Pollutants, Chemical