Affiliation: | Department of Biological Sciences, Lancaster University, Lancaster LA1 4YQ, UK;;Life Sciences Community Stable Isotope Facility, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK;;Present address: Macaulay Institute, Craigiebuckler, Aberdeen AB15 8QH, UK;;Present address: Department of Biological and Environmental Sciences, University of Jyväskylä, PL35, 40014 University of Jyväskylä, Finland |