Nicholas J. Gotelli and Robert K. Colwell

Ecology Letters Volume 4, Issue 4, pages 379–391, July 2001, doi:10.1046/j.1461-0248.2001.00230.x

Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness

Pairs of samples must be rarefied on the same number of individuals to compare their richness. Pairs of datasets must be rarefied on the number of samples to compare their density. Autocorrelation as an estimate of patchiness.