The Biomass Succession extension implements succession with cohorts defined by age ranges and including biomass per cohort. Most parameters are able to change over time, due to climate change for example.
Contact: Robert Scheller, Portland State University
Copyright: University of Wisconsin
Latest release: Version 3.2.2 — October 2016 (Download)
View User Guide (PDF)
Biomass succession simulates changes in the biomass of each cohort dependent upon age, competition, and disturbance. The extension has been a popular tool when the focus of the research is on aboveground forest dynamics and when consideration of below ground dynamics is not important. Relative to succession extensions that track all possible Carbon pools (Century Succession and Forest Carbon Succession), it is relatively simple.
The Biomass Succession Extension generally follows the methods outlined in Scheller and Mladenoff (2004). Biomass Succession calculates how cohorts reproduce, age, and die and how cohort biomass (g m-2) changes through time. The Biomass Succession extension also tracks dead biomass over time, divided into two pools: woody and leaf litter.
Versions 2 and 3 of the Biomass Succession extension is conceptually nearly identical to version 1.x, although the inputs have changed. Notably, the user can now specify the probability of establishment given the species shade tolerance and site shade. Also, the user now specifies the maximum biomass by species and ecoregion, allowing better representation of shrubs and grasses. Leaf litter decay rates are no longer input and are a function of species leaf lignin and ecoregion actual evapotranspiration.
Developers: Robert M. Scheller, Portland State University
Lineage: First official release in LANDIS-II.
How to Cite: Scheller, R. M. and Mladenoff, D. J. A forest growth and biomass module for a landscape simulation model, LANDIS: Design, validation, and application. Ecological Modelling. 2004; 180(1):211-229.
Compatible Disturbance Extensions: Base Fire, Base Harvest, Base Wind, Base BDA, Base Drought, Dynamic Fuels and Fire, Biomass Harvest, Biomass Insects, Biomass Fuels
Compatible Output Extensions: Cohort Statistics Output, Max Spp Age Output, Age Reclassification Output, Biomass Output, Biomass-by-Age Output, Biomass Reclassification Output