Metodă pentru determinarea gradului de exercitare a funcţiilor ecoprotective în păduri [Method for the estimation of the degree of ecoprotective function of the forests]
2004
Cenușă R | Barbu I
The sustainable management of the forests must accomplish both main functions: conservation of the production capacity and the ecological service of the socio-economical activities nearby. This functions are produced by every specific stand at different level. For these evaluation, some parameters are used: diversity, stability and the forest continuity. First (Cd) is computed as function of the diversity of species (Cd1), of forest types (Cd2) and of the age structure (Cd3) (formule 4). The stability index (Cst) is computed as function of Cst1 - the stability coefficient of the stands with reduced resilience to disturbance factors and Cst3 of the stand with high resilience; p1, p3 - percentage of the stands in classes of resilience 1 and 3 (formule 5). The continuity index (Cc) depends by Ci - the weight of the silvicultural treatment and pi - percentage of forest area managed with the treatment i. On the basis of these indices, is computed the degree of acomplishing of the function (formule 6). The results permit evaluation of the intensity of the function, as follow: 100-150 - very weak, 160-250 - weak, 260-350 - medium, 360-450 - good and 450-550 - very good. The methos is easy to use based on the data from forest management plans (FMP). Computed for different periods (every 10 years the FMP are revised), the method permit a good evaluation of the forest management quality to assure the sustainable ecological services of the forests.
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