Abstract
The west section of Nanchuan River City is an important part of the water ecological environment of Xining city, known as the urban meeting room. In order to find out the possible causes of algal blooms in the summer of 2022, water quality detection, aquatic organism identification and sediment analysis were carried out in the main landscape ponds of the west section of Nanchuanhecheng. The results showed that 52 species of phytoplankton were identified, including 4 species of cyanobacteria, 29 species of diatoms, 14 species of green algae, 3 species of cryptophytes and 2 species of gymnophytes. There were 66 species of zooplankton, including 22 protozoa, 29 rotifers, 9 cladicornis and 6 copepods. There were 18 benthic animals, including 4 annelids, 3 molluscs and 11 arthropods. According to the detection results of aquatic organisms, water quality and sediment, the causes of algal blooms were analyzed and corresponding measures were proposed to provide reference for subsequent control work.
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