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Stability and Bifurcation Analysis of the Nutrient-Microorganism Model
  
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KeyWord:Nutrient-microorganism model, coexistence, Bogdanov-Takens bifurcation
Author NameAffiliation
Ranchao Wu School of Mathematical Sciences, Anhui University, 111 Jiulong Road, Hefei 230601, China 
Xiaoyu Qin School of Mathematical Sciences, Anhui University, 111 Jiulong Road, Hefei 230601, China 
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Abstract:
      Stability analysis and bifurcation of the nutrient-microorganism model are presented in this paper. It is found that the model could experience the changes of the equilibrium points and the saddle-node, the Hopf and the codimension-2 Bogdanov-Takens bifurcations. The induced complex dynamics are also illustrated, by virtue of theory like the Sotomayor's theorem, the normal form and the universal unfolding. From the obtained results, some insights into interaction between the nutrient and the microorganism can be given. Further, numerical simulation is carried out to verify the theoretical results.