Professor of Ecology, Royal Holloway University of London

Vilas Distinguished Achievement Professor of Ecology, University of Wisconsin-Madison

Former Professor of Botany & Environmental Studies, Univ. of Wisconsin - Madison

Professor of Evolution and Ecology

Department of Biology and Biochemistry, University of Houston

Dean, Odum School of Ecology, University of Georgia

USDA-ARS

University of New South Wales

Senior Scientist Aquatic Ecology, Netherlands Institute of Ecology

Kunming Institute of Botany, Chinese Academy of Sciences