title: How Species Boundaries Are Determined: A Response to Alexander et al.
authors.affiliation: Department of Biological Sciences, Macquarie University, Sydney NSW 2109, Australia. Electronic address: mark.westoby@mq.edu.au.
authors.forename: Mark
authors.initials: M
authors.lastname: Westoby
authors.affiliation: Irstea, UR EMGR, 2 rue de la Papeterie BP-76, F-38402, St-Martin-d'Hères, France.
authors.forename: Georges
authors.initials: G
authors.lastname: Kunstler
authors.affiliation: Department of Biological Sciences, Macquarie University, Sydney NSW 2109, Australia.
authors.forename: Michelle R
authors.initials: MR
authors.lastname: Leishman
authors.affiliation: Department of Ecology, Environment and Evolution, La Trobe University, Bundoora VIC 3086, Australia.
authors.forename: John
authors.initials: J
authors.lastname: Morgan