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| Characteristics of Phytoplankton Community in Country Contaminated Ditches During Ecological Restoration |
| Received:July 11, 2014 |
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| KeyWord:ecological restoration;water remediation;phytoplankton |
| Author Name | Affiliation | E-mail | | LIU Ya-qin | Shanghai Academy of Agricultural Sciences, Shanghai 201403, China | | | LIU Fu-xing | Shanghai Academy of Agricultural Sciences, Shanghai 201403, China | | | SONG Xiang-fu | Shanghai Academy of Agricultural Sciences, Shanghai 201403, China | | | ZOU Guo-yan | Shanghai Academy of Agricultural Sciences, Shanghai 201403, China | zouguoyan@263.net | | FU Zi-shi | Shanghai Academy of Agricultural Sciences, Shanghai 201403, China | | | PAN Qi | Shanghai Academy of Agricultural Sciences, Shanghai 201403, China | |
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| Abstract: |
| An ecological restoration project of a delta submerged dam constructed by zeolite and floating bed, combined with aeration and wetlands, was conducted in Zhujia ditch, a tributary of the Zhihu river located to the north of Lake Taihu. Water quality and phytoplankton community were investigated during the ecological restoration. The ecological restoration changed the community structure and succession direction of phytoplankton. The dominant Cyanophyta and Cryptophyta were replaced by species belonged to Bacillariophyta, Chlorophyta and Pyrrophyta. The standing crop of phytoplankton was inhibited significantly by ecological restoration, and the total phytoplankton biomass was less than 6 mg·L-1 of during the restoration. However, the biodiversity of phytoplankton maintained at a relatively high level, with the mean Shannon-Wiener index of 2.32 during the ecological restoration. The removal of nutrients by the ecological restoration was a major factor influencing the phytoplankton community changes. |
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