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| Development of competition model of algae for light and the impact of turbulence on algal competition |
| YU Qian1,2, CHEN Yong-can3,4, LIU Zhao-wei4, LI Na1,2 |
1. China Institute of Water Resources and Hydropower Research, Beijing, 100038, China;
2. Research Center on Flood & Drought Disaster Reduction of the Ministry of Water Resources, Beijing, 100038, China;
3. School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China;
4. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China |
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Abstract Light intensity is a very important factor for algal growth as one of essential resources. In the nature, a number of algae species live together in water. The population of algae species, who has the advantage of acquiring light, will gain the population, and vice versa. In this paper, a competition model, based on the former uni-species model, was developed. Through numerical simulations, the mechanics of hydrodynamic turbulence on species competition were tried to be explained. The simulation results revealed that migration abilities of each species and the growth rate determined the advantage species in calm water and in turbulent water, respectively. In addition, the modified dynamic self-shading accorded the simulation results with the reality, which not only expedited the advantage of Microcystis in calm water but also restricted the unlimited population increase of Chlorella in turbulent water.
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Received: 12 December 2017
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