[Recruitment dynamics of bloom-forming cyanobacteria in Meiliang Bay of Taihu Lake].
A collection trap was installed on the sediments in Meiliang Bay of Taihu Lake during the period from March to June to investigate the recruitment of phytoplankton, and cyanobacteria in particular. The algal abundance in the trap was monitored, and compared with that in water column and surface sediments. The results showed that the algal recruitment was related to the temperature, irradiance, DO content, and oxidation-reduction potential (ORP) in surface sediment. After over-wintering on the sediments, the colonies of cyanobacteria experienced a prior developmental process before re-invasion of the water column. During the investigation period, the recruitment rates of chlorophyll a and b and PC were 59.84 %, 76.83 % and 466.98%, and the recruitment amounts accounted for 7.18%, 3.71% and 9.33% of their maximum pelagic counterparts in water column, respectively. These results showed that shallow lake was the important seed bank to the pelagic populations, and water bloom was formed as the result of the recruitment and biomass accumulation of cyanobacteria.
Zhang
Xiaofen
X
Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. njuzxf@yahoo.com.cn
Kong
Fanxiang
F
Cao
Huanshen
H
Tan
Jiankang
J
Tao
Yi
Y
Wang
Meilin
M
D002681:China; D000458:Cyanobacteria / Q000254:growth & development*; D004784:Environmental Monitoring; D005068:Eutrophication; D005618:Fresh Water / Q000032:analysis; D010839:Phytoplankton / Q000254:growth & development*; D014876:Water Pollution