Susan Elaine Hartley OBE is a British ecologist and is Vice-President for Research at the University of Sheffield.[1] Previously she was director of the York Environmental Sustainability Institute (YESI) at the University of York[2] and Professor of Ecology at the University of Sussex, specialising in interactions between plants and animals. In December 2009 she delivered the Royal Institution Christmas Lectures on The 300 Million Years War, broadcast on More4.