A Sample-size-based; B Coverage-based rarefaction and extrapolation sampling curves for species richness; C Sample completeness curves for each vegetation type. Solid line segments indicate rarefaction and dotted line segments indicate extrapolation (up to a maximum sample size of 40), while shaded areas indicate 95% confidence intervals (based on a bootstrap method with 100 replications). Colours and symbols: black square, 1.1 Celtis tala/Sida rhombifolia closed forest; red circle, 1.2 Aspidosperma quebracho-blanco/Prosopis kuntzei open forest; blue triangle, 2.1 Jarava pseudoichu/Vachellia caven open savanna; green diamond, 2.2 Acalypha variabilis/Nassella cordobensis scrubland.