The biomass of bloom-forming colonial Microcystis affects its response to aeration disturbance
文献类型： 外文期刊
作者： Wang, Xiaodong 1 ; Liu, Xingguo 1 ; Qin, Boqiang 2 ; Tang, Xiangming 2 ; Che, Xuan 1 ; Ding, Yanqing 3 ; Gu, Zhaojun 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, 63 Chifeng Rd, Shanghai 200092, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China
3.China Univ Min & Technol, Sch Resources & Geosci, Xuzhou 221116, Jiangsu, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.6； 五年影响因子：4.9 ）
ISSN： 2045-2322
年卷期： 2022 年 12 卷 1 期
页码：
收录情况： SCI
摘要： The algal succession in Microcystis blooms of varying biomass under continuous aeration was studied in a greenhouse. There were four treatments (control, Low, Medium, and High) with initial chlorophyll a (Chl-a) of 32.5, 346.8, 1413.7, and 14,250.0 mu g L-1, respectively. During the experiment, Cyanophyta biomass was the lowest in the Medium treatment (P < 0.05), while its Chlorophyta biomass was the highest (P < 0.05). Both Chlorophyta and Bacillariophyta biomass were the lowest in the High treatment (P < 0.05). Bacillariophyta biomass, particularly the diatom Nitzschia palea was the highest in the Low treatment (P < 0.05), and Nitzschia palea cells were attached to the Microcystis colonies. Thus, the algal shift in Microcystis blooms under aeration disturbance depends on its initial biomass, and it shift to green algae or/and diatom dominance in the control, Low, Medium treatments. Diatom cells, particularly N. palea, grew in an attached form on Microcystis colonies in treatment Low, in which the colonies provided media for the adherence. The mechanism of the algal shift with different biomass must be related to the nutrient level, low light and aerobic conditions under aeration disturbance as well as the aeration itself, which destroyed the Microcystis colonies' advantage of floating on the water.
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