| Period | Shannon’s Diversity | Simpson’s | |||
| H’ | E | Var H’ | D | 1/D | |
| 2015 | 2.799 | 0.967 | −0.002 | 0.034 | 25.2 |
| 1995 | 2.909 | 0.971 | −0.0043 | 0.028 | 35.77 |