My current research interests are focused on quantifying the impacts of stressors (chemical pollution, climate change, acidification, species invasions and habitat alteration) on the structure and functioning of aquatic food webs and ecosystems. I am currently collaborating with a range of expert from different disciplines to unravel the links between patterns and processes in natural systems, and to develop a conceptual framework within which to advance ecological theory. I am particularly interested in how "metabolic theory" and allometric scaling laws can be applied to complex ecological systems. For instance, body size and temperature determine basal metabolic rate, and the consequences of this are manifested across multiple levels of biological organisation, from molecules, to individuals, and through to entire ecosystems. Allometric scaling is common in nature (e.g. body size versus ingestion rate, growth rate, interaction strength etc.) and can have potentially profound effects on the structure and dynamics of complex ecological networks (food webs, plant-pollinator networks etc.) and their ability to withstand perturbations. Many stressors can reshape these fundamental relationships and how metabolism and body size given higher level processes: we have found that warming alters the base of the food web, with huge implications for the apex presdators at the top of the food chain, for example.