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Stephen Ellner

Horace White Professor of Ecology and Evolutionary Biology

Stephen Ellner

E145 Corson Hall

Educational Background

Postdoctoral Fellow, Weizmann Institute (1984-1985)

Ph.D., Cornell University (1982)

B.A., University of California, Berkeley (1975)




I am a theoretical ecologist, working mostly on questions in population, community, and evolutionary ecology. My recent work has focused on applications of trait-based models in population and community ecology (see Research below for details). My students and postdocs have worked on a variety of related and unrelated projects, such as detection of invasive species, analysis of eco-evolutionary dynamics using fast-slow systems theory, evolution of multiple defense traits in plants, and continental-scale modeling of monarch butterfly populations. I am a Fellow of the Ecological Society of America (class of 2016) and Horace White Professor of Ecology and Evolutionary Biology.

 My recent teaching includes BioEE 3620/MATH 3620: Dynamic Models in Biology, BioEE 7600:Introduction to Modeling in Ecology and Evolutionary Biology, and BioEE 3610: Advanced Ecology.


Coexistence, demography, infectious disease, structured populations.


  • Ecology and Evolutionary Biology

Graduate Fields

  • Applied Mathematics
  • Computational Biology
  • Computational Science and Engineering
  • Ecology and Evolutionary Biology


My current research topics include: using structured population models to analyze the origins of between-individual variability in lifetime outcomes (longevity, reproductive success, etc.); identifying the environmental “drivers” of population and community dynamics; population modeling and management of infectious diseases in multi-species communities characterized by functional traits, especially plant-pollinator networks; developing methods to identify and quantify the mechanisms allowing species coexistence and maintaining biodiversity in real communities.


Spring 2022

Fall 2022


For a complete list of publications, please see my Google scholar page here.


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