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 |