In 2000 Schwartz and colleagues calculated that before the start of the decline, the original population of T. taxifolia may have been 300,000 between 650,000 plants, with 357,500 individual trees being the preferred estimate, based on a historic abundance of 14.2% of dominant ravine trees in 1914, or 30 trees/ha, and a historic distribution of some 203 sqkm .