The seed-bank data proposed by Colwell and Coddington (1994) which contains 121 standardized soil samples with 34 species observed collected from one-hundred 10 m x 10 m grids in a Costa Rican forest.
Only the presence/absence of each species is recorded in the matrix. If the species is presence, it is record 1. On the contrary, it is record 0.
Colwell, R.K. & Coddington, J. A. (1994) Estimating terrestrial biodiversity through extrapolation. Philosophical Transactions of the Royal Society of London B - Biological Sciences, 345, 101-118.
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