Table 2 Descriptions of the tree community in 1978 and 2019 in an old-growth section of forest in Kibale National Park, Uganda. 1D is the exponential of Shannon’s entropy and is interpreted as the number of ‘common’ species in the community, which weights each species according to its frequency in the community, and 2D is the inverse Simpson concentration, which favors abundant species and is therefore interpreted as the number of ‘very abundant’ or ‘dominant’ species in the community
From: A 40-year evaluation of drivers of African rainforest change
All Species | Top Ten Species | |||
|---|---|---|---|---|
1978 | 2019 | 1978 | 2019 | |
Abundance | 436 | 508 | 345 | 391 |
Completeness | 0.97 | 0.98 | ‒ | ‒ |
Richness (0D) | 45 | 43 | ‒ | ‒ |
Number of common species (1D) | 15.5 | 18.8 | ‒ | ‒ |
Number of dominant species (2D) | 8.7 | 12.4 | ‒ | ‒ |
Shannon Diversity (H′) | 71.8 | 78.1 | 84.6 | 93.5 |
Mean DBH | 23.7 | 28.0 | 21.3 | 26.4 |
Percentage of Light demanding Species (n) | 65.4 % (279) | 50.8 % (253) | 68.7 % (237) | 50.1 % (196) |
Percentage of Shade-tolerant species (n) | 34.5 % (147) | 49.2 % (245) | 31.3 % (108) | 49.9 % (195) |