一、报告题目：Dynamics of Coral-Algae Phase Shift via Ecological Stoichiometric Approach

二、报告人：范猛 教授

三、时间：2026年11月17日（周二）下午15:00—16:00

四、地点：A4-218

报告摘要：Coral reefs have evolved over hundreds of millions of years and are now considered one of the most critical yet vulnerable ecosystem on earth. Environmental changes, including variations in light availability, nutrient levels, and fishing pressure, can significantly impact the health of coral reefs, potentially leading to ecosystem degradation. A coral-macroalgae-herbivorous fish model is developed based on ecological stoichiometry to investigate the dynamics of coral-algae phase shifts. The positivity, invariance, and dissipativity of the model are carefully established, the existence and stability of equilibria are rigorously demonstrated, and rich dynamics such as bistability and various types of periodic oscillations are numerically explored. Furthermore, the effects of environmental factors (e.g., light intensity, nutrient levels, and fishing pressure) on the system’s dynamics are investigated. The main findings highlight that environmental variations are key drivers of ecological phase transitions in coral reef ecosystems, providing more insights into the mechanisms underlying coral-algae dynamics and offering implications for the sustainable management of coral reefs.

报告人简介：范猛，东北师范大学二级教授、博士生导师。主要从事非线性动力学系统和生物数学研究，出版专著、教材和教学指导书各1部，共同主编论文集和进展特刊7部，发表论文190余篇，主持国家自然科学基金和省部级项目十余项，十年入选Elsevier中国高被引学者。获国务院政府特殊津贴、教育部新世纪优秀人才等荣誉；获教育部自然科学奖二等奖、秦元勋数学奖等科技奖励；获宝钢教育奖优秀教师奖、明德教师奖等教学奖励。曾在美国、加拿大、日本、韩国等国家的大学进行学术访问。现任5种学术期刊编委、中国数学会生物数学专业委员会副主任、中国工业与应用数学学会数学生命科学专业委员会常务委员等。

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