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Bootstrap Richness Estimator

Source: R/estimators.R
bootstrap_richness.Rd

Bootstrap estimator of total species richness (Smith & van Belle 1984). Uses species detection probabilities to estimate undetected species.

Usage

bootstrap_richness(x, n_boot = 200L)

Arguments

x

A site-by-species matrix (presence/absence or abundance). Automatically binarized.

n_boot

Integer. Number of bootstrap replicates for SE. Default 200.

Value

An object of class spacc_estimate.

Details

The bootstrap estimator is: $$S_{boot} = S_{obs} + \sum_{i=1}^{S_{obs}} (1 - p_i)^n$$ where \(p_i\) is the proportion of sites where species \(i\) occurs.

References

Smith, E.P. & van Belle, G. (1984). Nonparametric estimation of species richness. Biometrics, 40, 119-129.

See also

jackknife(), chao2()

Examples

species <- matrix(rbinom(50 * 30, 1, 0.3), nrow = 50)
bootstrap_richness(species, n_boot = 100)