February 4, 2010 – "Bioenergy, Biodiversity, Food and Global Change Mitigation: Can we have it all?"
Stephen Long, Professor of Crop Sciences, Robert Emerson Professor, and Resident Scientist for the National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign

April 22, 2009 – "Assembling and restoring ecosystems in a rapidly changing world" with Aaron Ellison, Harvard Forest

April 13, 2009 – "A Case Study of Biological Invasion: a Global Threat to Biodiversity" with Daniel Simberloff, Institute for Biological Invasions, University of Tennessee, Knoxville

April 3, 2009 – "Sustainability in a Changing World: Concepts and Policy Strategies to Address Climate Change in Alaska" with Terry Chapin, Institute of Arctic Biology, University of Alaska, Fairbanks

October 23, 2008 – "The Impacts of Agriculture on Biodiversity: Lessons and Lies from Kenya and Borneo" with David Wilcove, Professor of Ecology and Evolutionary Biology, Princeton University

April 16, 2008 – "Modeling the Global Biosphere" with Stephen Pacala, Petrie Professor of Biology; Director, Princeton Environmental Institute

March 11, 2008 – "Biodiversity Loss and the Rise of Emerging Infectious Diseases" with Richard Ostfeld, Senior Scientist, Institute of Ecosystem Studies

February 13, 2008 – "Seas the Day: Science Informing Today's Choices for Tomorrow's Ocean" with Jane Lubchenco, Wayne and Gladys Valley Professor of Marine Biology; Distinguished Professor of Zoology, Oregon State University

December 5, 2007 – "Biodiversity and Global Change: Are We Yet a Predictive Science?" with Peter Reich, F.B. Hubacheck Senior Chair in Forest Ecology and Tree Physiology, University of Minnesota

October 24, 2007 – "The Paradox of Priestly's Bell Jar" with Shahid Naeem, Professor of Ecology, Columbia University