Fig. 3From: Use of DNA metabarcoding of bird pellets in understanding raptor diet on the Qinghai-Tibetan Plateau of ChinaEstimation of prey taxonomic richness with rarefaction and extrapolation. Using the iNEXT function, rarefaction curves were made to estimate sample completeness and expected taxonomic richness with additional sampling for the Eurasian Eagle Owl (n = 15) and Upland Buzzard (n = 26). Interpolation (solid lines) was performed using the sample sizes for each predator species while extrapolation (dotted lines) of species richness was performed on double the sample size. Figure made in R version 3.5.2Back to article page