Senior Scientist, Laboratoire d'Ecologie Alpine, CNRS, Univ. Grenoble Alpes, France

Professor of Ecology, Institute of Botany, Czech Academy of Sciences, Pruhonice

Research Professor | MNCN-CSIC | University of Évora

Distinguished Research Professor, University of Connecticut

Swiss Federal Research Institute WSL

Professor of Ecology and Evolutionary Biology, University of Arizona

Associate Professor, College of Charleston

Professor of Ecology, Aarhus University

Professor, Yale University

Professor, Department of Biology, UNC Chapel Hill