Plankton Community Succession in Artificial Systems Subjected to Cyanobacterial Blooms Removal using Chitosan-Modified Soils |
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Authors: | Qingyun Yan Yuhe Yu Weisong Feng Gang Pan Hao Chen Juan Chen Bo Yang Xuemei Li Xiang Zhang |
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Institution: | (1) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People’s Republic of China;(2) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People’s Republic of China;(3) Graduate School of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China;(4) 7# Donghu South Road, Wuhan, 430072, People’s Republic of China; |
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Abstract: | Using artificial systems to simulate natural lake environments with cyanobacterial blooms, we investigated plankton community
succession by polymerase chain reaction–denaturing gradient gel electrophoresis (PCR-DGGE) fingerprinting and morphological
method. With this approach, we explored potential ecological effects of a newly developed cyanobacterial blooms removal method
using chitosan-modified soils. Results of PCR-DGGE and morphological identification showed that plankton communities in the
four test systems were nearly identical at the beginning of the experiment. After applying the newly developed and standard
removal methods, there was a shift in community composition, but neither chemical conditions nor plankton succession were
significantly affected by the cyanobacteria removal process. The planted Vallisneria natans successfully recovered after cyanobacteria removal, whereas that in the box without removal process did not. Additionally,
canonical correspondence analysis indicated that other than for zooplankton abundance, total phosphorus was the most important
environmental predictor of planktonic composition. The present study and others suggest that dealing with cyanobacteria removal
using chitosan-modified soils can play an important role in controlling cyanobacterial blooms in eutrophicated freshwater
systems. |
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