A Comparison of the Structure and Composition of Montane and Lowland Tropical Forest in the Serranía Pilón Lajas, Beni, Bolivia Back to Main Page Table 4. A comparison of one hectare forest inventories established in humid tropical forest on well-drained soils at selected localities in South America; only data for trees¹ 10 cm diameter is presented. Locality Source Number of trees Basal Area (m2) Number of families Number of genera Number of species Bolivia Cumbre Pilón this study 647 30.62 37 92 146 Río Colorado this study 588 26.40 31 64 78 Bosque Chimanes (Beni) de Aguila (1995) 582 25.59 32 63 78 Amboró, Río Saguayo (Santa Cruz) Vargas (1995) 506 39.20 31 58 67 Perseverancia (Santa Cruz) Vargas et al. (1994) 597 23.38 36 69 90 Noel Kempff Park -1 (Santa Cruz) Saldias et al. (1994) 653 34.01 32 51 75 Noel Kempff Park -2 (Santa Cruz) Saldias et al. (1994) 606 25.16 33 61 94 Alto Ivón (Beni) Boom (1986) 649 21.48 28 63 94 Selected Other Localites Añangu (Ecuador)1 Balslev et al. (1987) 728 33.70 53 141 228 Jatun Sacha (Ecuador) Neill & Palacios (ms.) 724 30.53 47 128 246 Yanamono (Peru) Gentry (1988a) 580   58   283 Mishana (Peru) Gentry (1988b) 842   50   275 Tambopata (Peru) Gentry (1988b) 602   42   155 Rio Xingú - 1 (Brazil) Campbell et al. (1986) 393 27.63 33 76 133 Rio Xingú - 2 (Brazil) Campbell et al. (1986) 567 32.14 33 83 162 Rio Xingú - 3 (Brazil) Campbell et al. (1986) 460 28.27 33 72 118 1. Based on point-center transects transformed to hectare values.