邀请人：万辉 副教授
腾讯会议：646 371 954
摘要：Phytoplankton (algae) are the basis of aquatic ecosystem and play an important role in energy flow and material cycle. Most deep lakes on Earth are stratified. Lakes are generally divided into two layers: pelagic layer and benthic layer. Stratification separates pelagic layer with a horizontal plane called thermocline into two zones : epilimnion and hypolimnion. Several mathematical models connecting pelagic layer and benthic layer or epilimnion and hypolimnion
are proposed to describe the competition of phytoplankton for nutrients and light in a stratified lake. The existence and stability of nonnegative steady-state solutions are completely characterized for all possible parameter ranges by means of stability analysis, bifurcation theory and extensive simulations. We also consider the influence of environmental parameters on the vertical distribution and biomass density of phytoplankton via a systematic sensitivity analysis, and investigate their roles in phytoplankton blooms. These results can be used for the prediction of phytoplankton competition and blooms in a stratified lake.
个人简介：张继民，黑龙江大学教授，博士生导师，九三学社社员，2010年博士毕业于东北师范大学，2011年于吉林大学从事博士后研究工作，2016年和2019年访问美国威廉玛丽*女王调教-女王调教视频-女王 调教小说。主要从事微分方程稳定性和水生生态系统数学模型分析等方面的研究工作，主持国家自然科学基金，黑龙江省自然科学基金，中国博士后基金等项目10余项。在Journal of Nonlinear Sciences, Journal of Statistical Physics, Journal of Mathematical Biology, Mathematical Biosciences, Bulletin of Mathematical Biology, Journal of Dynamics and Differential Equations等发表学术论文40余篇。