The BCI dataset contains location and species identity for all 10cm
dbh (diameter at breast height) trees on Barro Colorado Island,
currently for years 1981-1983, 1985, 1990, 1995, 2000, and 2005. The
subset of interest here is the abundances for each of the 252 species
recorded. The BCI dataset is not included in the untb package, because its
licence appears to be inconsistent with the GPL.
It is discussed here because it was used as an example dataset in a
paper currently under review at the Journal of Statistical Software;
and because it has become a standard dataset in the field of
ecological dynamics.