Affiliation: | Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK,;Landcare Research, PO Box 69, Lincoln, New Zealand,;Institute of Ecosystem Studies, Millbrook, New York State, USA,;Arthur Rylah Institute for Environmental Research, PO Box 137, Heidelberg, Victoria 3084, Australia, and;Department of Conservation, Southern Regional Office, PO Box 13-049, Christchurch, New Zealand |