Stephen is an ecophysiologist of aquatic algae and plants with a particular interest in relating changing environmental conditions, particularly those driven by climate change, to physiological and ecological responses through laboratory experiments, field measurements, use of novel techniques and the analysis of long-term environmental data. He has a particular interest in changing CO2 availability in water and the effects this has on ecology of algae and plants.
2015- present Chinese Academy of Sciences Visiting Professor for Senior International Scientists, Wuhan, China
2014 - present Individual Merit Promotion to Senior Principal Scientific Officer
2013 Visiting Scholar Université Aix-Marseille
2011 - present Visiting Professor at Queen Mary University of London
2011 - 2012 Chinese Academy of Sciences Visiting Professor, Wuhan, China
2004- present Head of the Lake Ecosystems Group
2004 - 2006 Honorary Professor at Wuhan Botanic Gardens, China
1995 - 2014 Principal Scientific Officer at CEH Lancaster (formerly Windermere)
1995 - 1996 Visiting Professor, Aarhus University
1990 - 1995 Senior Scientific Officer at CEH Windermere (IFE)
1988 - 1990 NERC PDRA at St Andrews University.
1983 - 1987 Temporary lecturer at St Andrews University.
1981 - 1983 NERC Research Fellow at FBA Windermere.
Editorial boards: Aquatic Botany (1987-); Freshwater Biology (1997- ).
Editor of special issues: Hydrobiologia (2002); Freshwater Biology (1995 & 2011); Aquatic Botany (2013).
Associate editor: Inland Water (2010- ); Biology Letters (2015- ).
Council member: British Phycological Society (2003-05); Freshwater Biological Association (2003 – 08).
Advisor: Status of Freshwater Ecology in the UK (2005); Defra Nitrate Vulnerable Zones (2011-13); NERC grants college (2012 -).
Received the Luigi Provasoli Award from the American Phycological Society in 1992. Awarded Lancaster University Staff Prize for working on a joint project (RELU) with staff from the University in 2011.
1978 - 1981 University of St. Andrews PhD. The nature of competition between macrophytes and phytoplankton in freshwaters.
1975-1978 University of Reading B.Sc. (Hons) Botany & Zoology (First class)
Member of the: British Ecological Society, British Phycological Society and the International Society of LImnology.