Contrasting responses to climate change at Himalayan treelines revealed by population demographics of two dominant species.

Size–class distribution and regeneration potential Size–class distributions of both species on either side of the treeline (Figure 6 ) exhibited highly significant negative exponential regression ( p < .01) between size classes and their frequencies in the studied plots.

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In contrast, climatic treelines in undisturbed areas of the Canadian Rockies showed a trend toward upward shift.

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