The Tropical Forest Regrowth (TFR) model is derived from the Multiple Element Limitation (MEL) model (Rastetter and Shaver 1992; Rastetter et al.

The Terrestrial Ecosystem Model (TEM) is a process-based ecosystem model that describes carbon, nitrogen and water dynamics of plants and soils for terrestrial ecosystems of the

The non-equilibrium, stable-isotope simulator (NESIS) calculates the dynamics in the isotopic signature of the stocks of an element using the output from any parent model that p

The modelshell program is a wrapper for mass balance type models. Modelshell provides a GUI interface, input and output routines, and a simple graphing routine.