Research interests Plant-to-soil carbon fluxes Mycorrhizal fungi- their networks of power and influence - from nano-to-global scales Myco-heterotrophy: plants parasitic on fungi Specialised root functioning Pollution impacts on plants, soil biology and chemistry, and health Professional activities Advisor to the Editors of the New Phytologist (1997-present) Editorial board of Mycological Research (1999-2003) British Ecological Society Policy Advisory Group on Climate Change (2007-present) Phosphorus in Forest Ecosystems. Deutsche Forschungsgemeinschaft, Workshop Berlin 17-18 June 2010. Soil Phosphorus. Australian Research Council-New Zealand Network for Vegetation Function, Working Group 64, Perth, Western Austalia, December 2009. National Science Foundation USA - Workshop: Frontiers in Exploration of the Critical Zone II: Biological Aspects of Weathering, Washington DC, October 2009. External examiner for PhD candidates at University College Dublin, 2010; Imperial College, London 2009; University of Nottingham, 2009; University College Dublin, 2008; Manchester Metropolitan University 2007; The University of Lund, Sweden 2004; The University of York, UK 2002; The University of Western Sydney Australia, 2000; and The University of Durham, 1997.