My scientific work examines the study of species interactions in tropical ecosystems from Latin America and Africa. Recent research highlights the decline of animal life (“defaunation”), and how this affects ecosystem processes/services. I teach ecology, natural history, and conservation science at undergraduate and postgraduate levels at Stanford, and conducts science education programs with underserved children in the Bay Area and in Mexico. My lab includes undergrads, graduate students, postdocs and visiting scholars from US, Latin America and Spain. I have coauthored the new Framework for K-12 Science Education.