Colloquium - Alexandru Hening

Date: December 4, 2020

Time: 1:00PM - 2:00PM

Location: Zoom

Speaker: Alexandru Hening, Tufts University

Description:
Title: A general theory of coexistence for ecological communities
Abstract: A fundamental question from population biology is finding conditions under which interacting species coexist or go extinct. I present results that lay the foundation for a general theory of stochastic coexistence. This theory extends and makes rigorous Modern Coexistence Theory and leads to resolving a number of conjectures due to Chesson, Ellner, and Palis. I explain how this theory can be used to complete the classification of three-species stochastic ecological systems and end with an important example that shows that random environmental fluctuations can rescue species from extinction.