Figures & data
Figure 1. Map of South America showing northern Chile and sites of pellet collection in Pampa del Tamarugal.
Table 1. Seasonal description of Geranoaetus polyosoma diet in Pampa del Tamarugal (Atacama Desert).
Figure 2. Rarefaction curve for the species richness found in the pellets of the variable hawk (mean and standard deviations) based on the number of replicates sampled. The asymptotic curve indicates that total species richness in the Pampa del Tamarugal was reached after about 60 samples. Calculation was performed using the EstimateS 9.10 program.
Figure 3. Variation of prey diversity consumed by Geranoaetus polyosoma in Chile and Argentina across the rainfall gradient. Species data and mean annual rainfall were obtained from: this study (Tamarugal); Valladares et al. (Citation2015) (Atacama); Schlatter et al. (Citation1980) (Dehesa); Figueroa et al. (Citation2003) (P. Tranquilo); Baladrón et al. (Citation2009) (B. Aires); Monserrat et al. (Citation2005) (Neuquén); and Travaini et al. (Citation2012) (Junín and Bosque P.). A, Diversity of prey measured with Shannon index; B, diversity measured with evenness index. Error bars indicate standard error for indexes; C, Shannon (H) and evenness (E) indices were evaluated to establish statistical differences among sites by using diversity permutation analysis with the software Past v3.0. *Indicates significant differences, and ns indicates no significant differences at P < 0.05 among sites and indices (H/E), respectively.
