Mixedwood Growth Model (MGM)

The Mixedwood Growth Model  (MGM) is a deterministic, distance-independent, individual tree-based stand growth model for the boreal forest.  MGM is capable of modeling pure or mixed stands of white spruce, trembling aspen, lodgepole pine, jack pine, and black spruce.

Among the forest growth models for western Canada, MGM has the unique ability to model tree-level growth in mixed-species stands.  This tree-level / mixed-species architecture allows MGM to model multi-cohort stands (Grover et al. 2014), managed-stand treatments (Bokalo et al. 2013; Comeau 2014; Comeau and Fraser 2018), and fire-origin boreal forests (Bokalo et al. 2013).  MGM also has the ability to model discrete spatial treatments like understory protection (Grover et al. 2014).  In addition, this version of MGM includes climate-sensitive survival functions (Cortini et al. 2017).

MGM’s growth and survival relationships are based on data from across the western boreal.  Recent submodel updates have been published in Strimbu et al. (2017), Cortini et al. (2017), and Oboite (2018).  Regional variants of MGM are also available for Alberta, British Columbia, Saskatchewan, and Manitoba.  These variants allow the use of local species codes, site index curves, and tree volume equations.



Last Modified: July 2, 2019