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Table 3 Tree and sapling species, families, species richness and threatened species by zone (stratum). The species richness index is calculated based on Margalef (1958)

From: A multi-purpose National Forest Inventory in Bangladesh: design, operationalisation and key results

Zone Number of species Number of families Species richness index Total number of threatened species Density of threatened tree species
Trees & saplings (≥2 cm DBH) RegeneratingSpecies Trees & saplings (≥2 cm DBH) RegeneratingSpecies
(Stem∙ha−1) SE(±%)
Coastal 103 56 35 26 9.44 2 4.2 194
Hill 284 195 63 52 24.32 11 19.7 48
Sal 113 42 39 20 11.49 3 4.1 87
Sundarban 28 19 15 12 2.19 1 1743.6 47
Village 232 110 53 41 20.29 5 0.83 56
National 392 278 71 63 29.37 12 166.2 45