title: Cycles of change.
authors.forename: Nigel
authors.initials: N
authors.lastname: Williams
mesh_terms: D000818:Animals; D000864:Antarctic Regions; D001717:Birds / Q000502:physiology*; D002980:Climate; D017753:Ecosystem; D017752:Greenhouse Effect; D008962:Models, Theoretical; D011157:Population Dynamics