FIGURES
FIGURE 1 Species diversity values (± 84% CI) obtained by point counters (blue points) and ARUs (pink and red points) across three mountain habitats in British Columbia and southern Chile. Values presented are species richness (Hill number (q) =0) and the effective number of species calculated by the exponential of the Shannon-Wiener Index (Hill number (q) =1). All values are interpolated/extrapolated to 97% sample completeness. Values for both hourly ARU counts (0-4 hrs after dawn) and full morning ARU data, pooled, are presented. The grey line between hourly points is a spline fit to aid in visualizing potential temporal trends. Significant differences between methods are indicated by a *
FIGURE 2 Species richness (q=0) accumulation curves for point counts (blue) and ARUs (red) across three montane habitats in British Columbia and in southern Chile (± 95% CI). Dashed lines indicate the predicted final species richness obtained by each method with increased effort. The solid orange line indicates the minimum community richness based on multi-year habitat sampling (see Methods).
FIGURE 3 Efficiency of single-method and dual-method protocols as the bootstrapped proportion of the community (mean ± SE) detected with increasing monitoring hours across mountain habitats in British Columbia (BC) and southern Chile. Species detections were summed across all survey sites (BC: n=16-18 sites/habitat, Chile: n=10 sites/habitat) for each level of effort. Point count returns (blue points) range in effort from 1-3 counts/site and are labelled. The ARU only protocol (red dashed curve) ranges in effort from 1-15 counts/site. Dual-method protocols (purple curves) range from 1-15 ARU counts/site and vary in point count effort as labelled.