I use fossil
plants to investigate ancient ecosystems, past environmental change, and the evolution and extinction of plants and plant-insect associations. I
emphasize questions with relevance for modern
climate change, biodiversity, biogeography, and ecological processes.
Principal field areas include Patagonia, Argentina, and the
Western Interior USA.
Please browse the links below for more information.
Climate Change and Biodiversity: Paradise Lost or Found?
for the 2011 NAS Kavli German-American Frontiers of Science Symposium, Irvine, CA
Fossil Rainforests of Patagonia: Ancient Biodiversity and Living Legacy
public lecture for the Spring 2010 Research Unplugged series, Research Penn State
Do Leaf-Eating Insects Respond to Environmental Change? Insights from Fossils
for the Fall 2009 Earth Talks series at Penn State
Penn State Geosciences
Music Unit- with audio files)