A comparison of the percentage of phytoplankton abundance phyla in August and September indicated that except for WDL, all regions showed an increasing trend in Cyanophyta and Chlorophyta and a decreasing trend in Bacillariophyta in September, especially in SS, QJ, SDL, and EDL, where the changes were more obvious ( Figure 4 ). 3.2.2.
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Effects of Summer and Autumn Drought on Eutrophication and the Phytoplankton Community in Dongting Lake in 2022.
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Meanwhile, the water surface slope shows a decreasing trend in the dry season except in the flood season (July to September) [ 31 ].