Professor, Griffith University

Botany and Plant Science, Ryan Institute, National University of Ireland Galway

Retired/TX A&M Corpus Christi/affiliated Va Commonwealth

Research Scientist, IISD - Experimental Lakes Area

University of Delaware

Professor, School of Freshwater Sciences, University of Wisconsin-Milwaukee

Professor of Aquatic Microbial Ecology, Bristol University

Professor & Associate Dean of Academics, School of Environmental Sustainability, Loyola …

Professor of Plant Biology, Ecology & Evolution, Oklahoma State University

Professor Emeritus, OK Biological Survey & Biology, University of Oklahoma