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14 New Zealand Palaeodemography
Fig. 14.1 Walton’s map of pa distribution for a sample of 931 pa
map draws attention to the importance for survival in the Little Ice Age of a combination of the possession of horticultural land where tropical cultivars could be
successfully grown with tribal access to marine, forest and estuarine resources.
That the importance of kumara harvests increased as forest, marine and estuarine
resources dwindled is apparent from the scale of pa-building in the Little Ice Age to
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