Exact (Mao Tau) Expected Accumulation

Compute the expected species accumulation curve using sample-based rarefaction (Mao Tau estimator). This is analytically identical to the expected curve from random permutations.

Usage

mao_tau(x)

Arguments

x

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

Value

A data.frame with columns: sites, expected, sd, lower, upper

References

Colwell, R.K., Mao, C.X. & Chang, J. (2004). Interpolating, extrapolating, and comparing incidence-based species accumulation curves. Ecology, 85, 2717-2727.