Table 1 Overview of the number of plots (N) for each combination of focal tree species (numbers in the matrix); the frequency of each species is given for each species richness level (SR) and for the entire set of plots (overall)
| Q. cerris | Q. ilex | Q. petraea | C. sativa | O. carpinifolia | |
|---|---|---|---|---|---|
| SR = 1 (N = 10) | 2 | ||||
| 2 | |||||
| 2 | |||||
| 2 | |||||
| 2 | |||||
| Freq. | 2 | 2 | 2 | 2 | 2 |
| SR = 2 (N = 9) | 1 | 1 | |||
| 1 | 1 | ||||
| 1 | 1 | ||||
| 1 | 1 | ||||
| 1 | 1 | ||||
| 1 | 1 | ||||
| 1 | 1 | ||||
| 1 | 1 | ||||
| 1 | 1 | ||||
| Freq. | 4 | 4 | 3 | 4 | 3 |
| SR = 3 (N = 9) | 1 | 1 | 1 | ||
| 1 | 1 | 1 | |||
| 2 | 2 | 2 | |||
| 1 | 1 | 1 | |||
| 1 | 1 | 1 | |||
| 1 | 1 | 1 | |||
| 1 | 1 | 1 | |||
| 1 | 1 | 1 | |||
| Freq. | 6 | 6 | 5 | 4 | 4 |
| SR = 4–5 (N = 8) | 2 | 2 | 2 | 2 | |
| 2 | 2 | 2 | 2 | ||
| 2 | 2 | 2 | 2 | ||
| 1 | 1 | 1 | 1 | ||
| 1 | 1 | 1 | 1 | 1 | |
| Freq. | 7 | 8 | 6 | 6 | 6 |
| Overall freq. | 19 | 20 | 16 | 16 | 15 |
| Freq. (%) | 52.8 | 55.6 | 44.4 | 44.4 | 41.7 |