1. General Model Information
Name: Forest Increment Based on Ecological Types
Main medium: terrestrial
Main subject: forestry, biogeochemistry
Organization level: biocoenosis
Type of model: static-algebraic equations
Main application: decision support/expert system
Keywords: forest, growth rates, interaction, management, spruce-fir, northern hardwood, mixed-wood forest, ecological classifications, stochastic, matrix approach
USDA Forest Service
Northeast Forest Experiment Station
PO Box 640
Phone: (603) 868-7666
Fax: (603) 868-7604
Forest Increment Based on Ecological Types. An individual-tree, distance-independent stand matrix growth model
for northeastern forest types.
FIBER is a simulation model that examines the interaction of spruce-fir,
northern hardwood and mixed wood forest types within a forest stand. The
model predicts growth rates of these forest types based on forest management
practices and silviculture treatments. FIBER uses a two-state matrix approach
to model the dynamics of transition probabilities of growth between diameter
Input requirements of the model include tree stand table by diameter
class and species, climax species habitat and elevation. The same variables
are output by the model. The model uses 5-year iterations.
Author of the abstract:
II. Technical Information
Operating System(s): Any computer containing a FORTRAN compiler
Programming Language(s): FORTRAN
III. Mathematical Information
FIBER is a two-stage matrix model using dynamic transitionprobabilities for different ecological classifications to obtain the growth of trees between diameterclasses. These transition probabilities are a function of diameter, initial and residual stand basalarea, proportion of hardwoods, and elevation.
Stand table of number of trees per diameter class by speciesper unit area and elevation are needed. For more accurate predictions, a knowledge of site, soil,landform, and typical climax tree species is necessary, although values will be provided by theprogram according to present stand conditions.
Temporal Scale: 5 year iterations.Spatial Scale: Both individual stand or region such as New England.
Solomon, Dale S., David A. Herman, William B. Leak. 1995. FIBER 3.0:An Ecological Growth Model for Northeastern Forest Types. USDA Forest Service, NE-204.
Solomon, Dale S., Richard A. Hosmer, Homer T. Hayslett, Jr. 1987.
A two-stage matrix model for predicting growth of forest stands inthe Northeast. Canadian Journal 16 (3): 521-528.
FIBER HANDBOOK: A Growth Model for Spruce-Fir and Northern HardwoodForest Types. USDA Forest Service, NE-RP-602.
V. Further information in the World-Wide-Web
VI. Additional remarks
FIBER is useful for the study of the interaction of common tree speciesfound in northern climates which may change under various future climatescenarios. It can be used to assess different silviculture management strategiesunder different climatic conditions.
Last review of this document by: T. Gabele : 17. Sep 1997
Status of the document:
last modified by
Tobias Gabele Wed Aug 21 21:44:42 CEST 2002