Mathieu Jonard, Université Catholique de Louvain, ELI-e
HETEROFOR is a spatially-explicit and individual-based model under construction. The objective is to elaborate a model describing tree growth and resource use (solar radiation, water and nutrients) in heterogeneous forests (mixed and uneven-aged).
The model will be developed at the individual scale according to a process-based approach in order to account for interactions between individuals of different tree species and of different size and to take global change (especially climate change) into account. In addition, HETEROFOR should allow us to better understand tree response to water and nutritional stresses. The spatial scale considered is the stand (0.5 to 5ha) and the time scale range from a decade to a century.
At first, it will be used to predict change in tree species composition in pure and mixed stands of oak and beech in the Belgian Ardennes and to analyze how competition between the two tree species will evolve according to different climate and sylvicultural scenarios.
This model is also an opportunity to synthesize, integrate and structure the knowledge on mixed stands.
Work is currently under progress to connect Heterofor to the PhreeqC model to add the soil chemistry in the model.
Parkhurst, D.L., and Appelo, C.A.J., 2013, Description of input and examples for PHREEQC version 3—A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations: U.S. Geological Survey Techniques and Methods, book 6, chap. A43, 497 p., available only at http://pubs.usgs.gov/tm/06/a43/.