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Growth and aggregation dynamics of microcystis colonies in flow disturbed environments
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Yi-ling HU1, Zhong-yong YANG1, 2, *, Wei RAN3, Jing YANG1, Dao-bin JI1, 4
China Environmental Science | 2025, 45(6) : 3280 - 3288
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China Environmental Science | 2025, 45(6): 3280-3288
• Environmental Ecology •
Growth and aggregation dynamics of microcystis colonies in flow disturbed environments
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Yi-ling HU1, Zhong-yong YANG1, 2, *, Wei RAN3, Jing YANG1, Dao-bin JI1, 4
Affiliations
  • 1.College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China
  • 2.Hubei Field Observation and Scientific Research Stations for Water Ecosystem in Three Gorges Reservoir, China Three Gorges University, Yichang 443002, China
  • 3.Chongqing Dingcheng Construction Quality Testing Co., Ltd, Chongqing 409800 China
  • 4.Three Gorges Digital Intelligence Institute, China Three Gorges University, Yichang 443002, China
Published: 2025-06-20
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To investigate the effects of water flow disturbances on the growth and aggregation characteristics of Microcystis blooms, this study conducted controlled indoor experiments in a flume, with disturbance frequencies set at 30, 40, 50, and 60min-1. The growth dynamics and size variation of Microcystis colonies were systematically analyzed under varying disturbance conditions. The results showed that low-intensity water flow disturbances (frequency<40min-1 or velocity<0.026m/s) significantly promote the secretion of extracellular polymeric substances (EPS) in Microcystis, with a strong correlation observed between Chlorophyll-a and EPS concentrations (r2>0.85). Conversely, high-intensity disturbances (frequency>50min-1 or velocity>0.034m/s) inhibited EPS secretion, leading to a weakened correlation between Chlorophyll-a and EPS concentrations (r2<0.8). Within the experimental ranges of flow velocity (0~0.08m/s) and turbulent kinetic energy (0~0.004m2/s2), the size of Microcystis colonies exhibited minimal variation (ranging from 0.4~0.6mm). Furthermore, low-intensity disturbances facilitated the formation of surface blooms with shorter durations, whereas higher-intensity disturbances suppressed bloom aggregation while extending algal survival periods.

microcystis blooms  /  aquatic disturbance  /  controlled experiments  /  PIV  /  algal aggregation
Yi-ling HU, Zhong-yong YANG, Wei RAN, Jing YANG, Dao-bin JI. Growth and aggregation dynamics of microcystis colonies in flow disturbed environments[J]. China Environmental Science, 2025 , 45 (6) : 3280 -3288 .
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Article Info
  • Receive Date：2025-11-08
  • Online Date：2026-02-27
  • Published：2025-06-20
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  • Received：2025-11-08
Funding
Affiliations
    1.College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China
    2.Hubei Field Observation and Scientific Research Stations for Water Ecosystem in Three Gorges Reservoir, China Three Gorges University, Yichang 443002, China
    3.Chongqing Dingcheng Construction Quality Testing Co., Ltd, Chongqing 409800 China
    4.Three Gorges Digital Intelligence Institute, China Three Gorges University, Yichang 443002, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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