Appendix A (TABLE A1). Overview of the variables, their units, and sources required for calculation LUDI.
| Variable(s) | Description | Unit | Source |
| N, dbh | Stand density and diameter at breast height | (trees ha-1, m) | Observed |
| cdbh | Scaling factor of the self-thinning relationship | (-) | Calculated from least-square fitting of Eq. 2b to N and dbh |
| Nmin, Nmax, NA, NB, Npristine | Minimal and maximal observed stand density. Stand density for point A and B. Mean stand density of pristine forest. | (trees ha-1) | Observed |
| dmax | Distance on the self-thinning curve between Nmin and Nmax | |
Calculated from Eq. 2b and cdbh using the iterative procedure described in Appendix B |
| dAB | Distance on the self-thinning curve between NA and NB | |
Calculated from Eq. 2b and cdbh |
| dAB / dmax | Relative distance between NA and NB | (-) | Calculated from dmax and dAB |
| LUDIp | Planning component of the land use disturbance intensity | (%) | Calculated from Eq. 4 making use of dmax and dAB |
| Nobs, dbhobs, | Observed stand density and diameter breast height | (trees ha-1, m) | Observed |
| dbhmax | Maximum diameter at breast height for a stand with stand density Nobs | (m) | Calculated from Eq. 2b Nobs and cdbh |
| LUDIo | Operational component of the land use disturbance intensity | (%) | Calculated from Eq. 5 |
| LUDI | Land use and disturbance intensity | (%) | Calculated from LUDIp and LUDIo |
| dbhmax-pristine | Maximum diameter at breast height for a stand with stand density Npristine | (m) | Calculated from Eq. 2b and cdbh |
| dbhmaxx | Largest individual tree diameter observed in pristine forest | (m) | Observed |
| Nmaxx | Maximum stand density for a stand with dbhmaxx | (trees ha-1) | Calculated from Eq 2c and cdbh |