Figure 2

Species estimation curves: (a) sample-size-based rarefaction/extrapolation sampling curves (b) coverage-based rarefaction/extrapolation sampling curves and (c) sample completeness curves based on sample size and sample coverage for three elevation transects with different sample sizes (red colour—17 samples in Kashmir, purple colour—18 samples in Uttarakhand and blue colour—24 samples in Sikkim). The shaded portion in (a) represents the upper and lower bound 95% confidence intervals to the estimated richness. The cumulative number of lichen species (y-axis) is plotted as a function of the cumulative number of samples (x-axis) pooled in a random order.