Fig. 2
From: Change in trade wind inversion frequency implicated in the decline of an alpine plant
Estimated Haleakalā silversword population trend over time. Adjusted census totals for the entire population from 1971 to 2013 shown in (a), along with population size estimates for 1935 and 1962, with lower and upper bounds projected from counts on a single cinder cone (see Methods). Population trends for lower and upper elevation zones, calculated from 19 regions surveyed in all five censuses, plotted by (b) number of plants, and (c) number of plants relativized by highest totals in each zone