Scientific Foundations for the Simulation of Ecosystem Function and Management in FORCYTE-11The FORCYTE-11 (FORest nutrient Cycling and Yield Trend Evaluator) forest simulation model combines the traditional historical bioassay modeling approach with process-based simulation modeling. It provides a method of predicting future forest biomass yield under a variety of management conditions. The hybrid simulation approach to modeling the management and long-term productivity of forested ecosystems is reviewed, and the representation of production ecology, succession, and various nutrient transfer pathways in FORCYTE-11 are described. The key driving function in the model (foliage nitrogen efficiency), the concept of site quality, and the simulation of site quality change that is used in the model are discussed. The importance of an accurate definition of the state of the simulated ecosystem at the start of a run is emphasized, and the use of the ECOSTATE (STATE of the ECOsystem, as generated by FORCYTE-11) file in this process is described. Examples of how FORCYTE-11 can simulate secondary succession and the impacts of forest management on ecosystem form and function are given. There is a brief review of the limitations of the FORCYTE-11 modeling approach. |
Common terms and phrases
၈ ၈ ၈ allocation approach axis biogeochemical cycling biogeochemistry biomass accumulation biomass components bryophytes canopy function cation exchange capacity competition data age decomposition defined Douglas-fir ECOSTATE file ecosystem ecosystem condition fireweed foliage biomass foliage nitrogen FORCYTE FORCYTE-11 model forest floor Graph growth and yield harvest height growth historical bioassay humus input data input file internal cycling KG/HA Kimmins leaching leaf area light LITTER FALL T/HA live canopy loss MANAFOR maximum biomass maximum value moisture mortality mycorrhizae net primary production nutrient availability nutrient cycling nutritional site quality photosynthetic plant growth predictions primary production process-based PRODUCTION T/HA/TIME production values given quality change rates red alder representation rotation salmon berry SCFNE setup SMALL ROOT soil nutrient soil processes species Stand age stand density Stem biomass STEMWOOD throughfall tion understory VARIABLE PLOTTED