Common dynamic structure of Canada lynx populations within three climatic regions

Across the boreal forest of Canada, Lynx populations undergo regular densit y cycles. Analysis of 21 time series from 1821 onward demonstrated structur al similarity in these cycles within large regions of Canada. The observed population dynamics are consistent with a regional structure caused by clim atic features, resulting in a grouping of Lynx population dynamics into thr ee types (corresponding to three climatic-based geographic regions): Pacifi c-maritime, Continental, and Atlantic-maritime. A possible Link with the No rth Atlantic Oscillation is suggested.