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Sample-based rarefaction curves for trees greater than 10 cm DBH in 1997 (initial census) for four second-growth forest 1 ha plots in northeastern Costa Rica on former pasture. Site ages are given in parentheses next to each solid line. Grey lines indicate 95% confidence intervals for species richness based on sample-based rarefaction (Mao Tau; Colwell et al. 2004).
