Seasonal variation and principle of cyanobacterial biomass and forms in the water source a

Seasonal variation and principle of cyanobacterial biomass and forms in the water source area of

Chaohu City, China

XU Xiangen;KE Fan;LI Wenchao;FENG Muhua;SHANG Lixia;FAN Fan;HE Yanzhao

【期刊名称】《中国海洋湖沼学报（英文版）》 【年(卷),期】2016(034)001

【摘要】We investigated seasonal variations in cyanobacterial biomass and the forms of its dominant population (M.aeruginosa) and their correlation with environmental factors in the water source area of Chaohu City,China from December 2011 to October 2012.The results show that species belonging to the phylum Cyanophyta occupied the maximum proportion of phytoplankton biomass,and that the dominant population in the water source area of Chaohu City was M.aeruginosa.The variation in cyanobacterial biomass from March to August 2012 was well fitted to the logistic growth model.The growth rate of cyanobacteria was the highest in June,and the biomass of cyanobacteria reached a maximum in August.From February to March 2012,the

main

form

ofM.aeruginosa

was

the

single-cell

form;M.aeruginosa colonies began to appear from April,and blooms appeared on the water surface in May.The maximum diameter of the colonies was recorded in July,and then gradually decreased from August.The diameter range of M.aeruginosa colonies was 18.37-237.77