Scientists visit meteorite impact crater in the wilds of Bolivia Back to Main Page Table 2. Summary of the vegetation structure at seven soil sample sites established on the ecotone transect.   Woody Cover Density Mean Height Basal Area M-1 High Forest > 100 % 48 23 3.15 M-2 High Forest > 100 % 52 25 4.39 M-3 Late Secondary Forest > 100 % 53 22 1.98 M-4 Early Secondary Forest > 100 % 53 19 2.31 M-5 Inundated Transitional Forest > 100 % 64 8 1.43 M-6 Savanna Scrub 25 - 30 % 2 2 0.06 M-7 Open Grassland 0 - 5 % 0 - -