Table 4 Number of different structural and functional indicators grouped by the objective of the estimation identified in Italy, Portugal, Slovenia and Spain, aiming to assess the conservation status of the forest habitat types and the possibility of estimation using NFI data (considering field protocols of Italy, Portugal, Slovenia and Spain)
Group of indicators | Number of indicators | Possibility of estimation with NFI data |
|---|---|---|
Alien plant species | 2 | High |
Animal species presence | 16 | Low |
Fellings | 1 | High |
Deadwood | 5 | High |
Disturbances | 5 | High |
Endangered species | 1 | Medium |
Floristic composition | 16 | Medium |
Herbivory | 7 | Medium |
Horizontal structure | 17 | High |
Naturalness | 2 | Medium |
Old-growth trees | 2 | High |
Regeneration | 12 | High |
Seeds and/or seedlings production/survival | 8 | Medium |
Shrub composition and structure | 1 | High |
Soil | 3 | Medium |
Spatial indicators | 17 | Low |
Stand age | 2 | High |
Tree composition | 30 | High |
Genetic information | 2 | Low |
Tree growth | 4 | High |
Tree health status | 5 | Medium |
Tree stress | 4 | Low |
Vertical structure | 5 | High |
Water flows and regime | 5 | Low |
Total | 172 |