Author(s): Oliveira, Tânia Sofia Moreira de Paiva de Almeida
Date: 2015
Persistent ID: http://hdl.handle.net/10400.5/9270
Origin: Repositório da UTL
Project/scholarship: info:eu-repo/grantAgreement/FCT/PIDDAC/SFRH%2FBD%2F46594%2F2008/PT;
Subject(s): forest management support; climate change; Eucalyptus globulus; process based models; 3-PG
Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
The objective of this work was the development of a tool to support eucalyptus stands management with the capacity of predicting forest development under different management options, thus providing forest managers with useful information in the form of variable outputs with interest for forest management. The tool uses the 3-PG model as the basis for growth predictions so that it can be used under a changing climate. The first thing to be done was the improvement of the crown ratio equation, taking advantage of the great amount of available data. With more precise equations, new values of biomass where estimated and a new set of aboveground biomass equations was developed. Biomass values are not only an important model output, but also a vital piece in the hybridization of the GLOBULUS growth and yield model and the 3-PG whole stand process based model. The linkage of the models resulted in a hybrid model with more detailed outputs that were further complemented with a diameter distribution model. The 3-PG fertility ratio is an important parameter of the model, but is estimated in a subjective way. The improvement with an equation that predicts it from soil characteristics is important not also because it is a flaw that is recurrently appointed to the model, but also because it will allow it to be sensible to fertilizations
FCT
