The Physio-Demo-Genetics model (denoted PDG) is an individual-based, spatially explicit mechanistic simulation model, coupling (1) a physiological module simulating individual tree responses to the environment (the CASTANEA model, Dufrêne et al. 2005); (2) a demographic module simulating tree survival, reproduction and pollen and seed dispersal; and (3) a quantitative genetics module controlling the heritability of key life history traits (implemented in CAPSIS Genetics library, Seinave & Pichot 2004). PDG model was used to investigate the plastic and genetic components of the variations of the timing of budburst along an altitudinal gradient of Fagus sylvatica (the European beech), in the reference publication of PDG (Oddou-Muratorio & Davi 2014).

A detailed documentation is available here: pdgdocumentation_v3.pdf

References Dufrêne E, Davi H, François C et al. (2005) Modelling carbon and water cycles in a beech forest. Ecological Modelling, 185, 407–436.

Oddou-Muratorio S, Davi H (2014) Simulating local adaptation to climate of forest trees with a Physio-Demo-Genetics model. Evolutionary Applications, 7, 453–467.

Seinave I, Pichot C (2004) docGeneticsMars04_fc.pdf. INRA. https://capsis.cirad.fr/capsis/help_en/genetics?&#documentation

Sylvie Oddou-Muratorio, Hendrik Davi (INRA URFM, Avignon) July 2017

PDG-Arena is a variant of PDG that aims at simulating the functioning of mixed stands. As PDG, it is based on the ecophysiological model CASTANEA, but its main processes were adapted for the tree level. In addition, it integrates the competition for both light and water, by using the SamsaraLight library which computes a 3D, tree-level, radiative balance.

Rouet, C., Davi, H., Druel, A., Fady, B., Morin, X. (2024) PDG-Arena: An ecophysiological model for characterizing tree-tree interactions in heterogeneous and mixed stands. doi: 10.1101/2024.02.09.579667

Camille Rouet, Hendrik Davi (INRAE URFM, Avignon) August 2024