Analysis of optimal environmental conditions for Microcystis blooms in large, shallow, eutrophic lakes

Analysis of optimal environmental conditions for Microcystis blooms in large, shallow, eutrophic lakes
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大型、浅水、富营养化湖泊微囊藻水华最佳环境条件分析

DOI:
10.1080/26895293.2021.1919569
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发表时间:
2021
期刊:
影响因子:
1.2
通讯作者:
Zhen Qi
Zhen Qi
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Meixia Li;Ruihong Yu;Zhengxu Cao;Ye Jin;Heyang Sun;Zhen Qi

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由蓝藻引起的有害藻类水华对湖泊生态系统造成了不利影响。查明影响水华的因素可以促进水生生态系统养护和早期预警活动。本实验模拟了中国干旱区浅层富营养化湖泊乌兰素海的环境特征。试验在不同温度(6、10、19、25℃)和不同营养条件(N:1∼6 mg/L,P:0.05∼1.00 mg/L)下进行,并在不同干扰水平(0、100、200、250、300、350、400 rpm)下,在水、藻类和沉积物的存在下进行。在本研究中,微囊藻的最佳生长条件为:19℃≤温度≤25℃;1.0 mg/L≤N≤1.6 mg/L;0.05 mg/L≤P≤0.1 mg/L;16≤N/P≤20;湖水流速=10 cm·S−1(200 rpm)。微囊藻生长的最适pH为8.5。研究影响水华蓝藻生长的环境因素可以帮助开发早期预警系统,并在气候变暖、N:P失衡和湖泊流速变化的情况下指导湖泊恢复活动。
Harmful algal blooms caused by cyanobacteria have detrimental impacts on lake ecosystems. Uncovering the factors influencing such blooms could facilitate aquatic ecosystem conservation and early warning activities. The experiment simulated the environmental characteristics of shallow eutrophic Lake Ulansuhai in arid regions of China. The experiments were conducted at various temperatures (6, 10, 19, 25°C) and different nutrient conditions (N: 1∼6 mg/L, P: 0.05∼1.00 mg/L) and in the presence of water, algae, and sediment under various disturbance levels (0, 100, 200, 250, 300, 350, 400 rpm). In this study, The optimalMicrocystisgrowth conditions observed in the study were as follows: 19°C ≤ temperature ≤ 25°C; 1.0 mg/L ≤ N ≤ 1.6 mg/L; 0.05 mg/L ≤P≤ 0.1 mg/L; 16 ≤ N/P ≤ 20; and lake flow velocity = 10 cm·s−1(200 rpm). The most suitable pH for the growth ofMicrocystisis 8.5. Investigating the environmental factors that affect the growth of bloom-forming cyanobacteria could aid the development of early warning systems and guide lake restoration activities under climate warming, N:P imbalance, and varying lake velocity scenarios.
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