Primary study on the feeding characteristics of a golden alga on Microcystis aeruginosa

摘要

A flagellate Jin821 which could feed on toxic cyanobacteria Microcystis aeruginosa was isolated,nand it was identified as a species of golden alga according to its morphological characters andn18S rDNA genes. The results of feeding experiments showed that the golden alga Jin821 couldnmake the high density (4.3 £ 106ncells·mL21n)of M. aeruginosa clear in a short time (40 h), withna removal rate of 99.9%. And the microcystin (MC-LR) was also degraded effectively at the samentime, with a removal rate of 82.7% of 114mg/L in 40 h. The growth curve of Jin821 was in ‘S’nstyle, with four phases of lag, log, stationary and decline. When M. aeruginosa was cleaned out,nJin821 would decline in number and slowed down in movement. In summary, the golden alganJin821 can be a potential biological way to control blue algal blooms in the future.