The Forest Vegetation Simulator (FVS) is a family of forest growth simulation models that can simulate a wide range of silvicultural treatments for most major forest tree species, forest types, and stand conditions. "Suppose" is the name for the graphical user interface for FVS. FVS is useful from a stand to a landscape level.
FVS answers questions about how forest vegetation will change in response to natural succession, disturbances, proposed management actions, and how such changes affect ecosystem values. Regional variants (20 in total) have been developed and calibrated, so that outputs are specific to particular geographic areas of the United States. In addition, supplementary add-ons, or extensions to the base variants are available to assess the effects of insects, disease, and fire. The Fire & Fuels Extension (or FFE) includes down dead wood and forest floor biomass information, and can therefore help to build a more complete picture of how carbon stocks change over time and according to succession, disturbances, and management. FVS provides a synthesis of scientific knowledge about important ecosystem components and a means for integrating the knowledge in a format useful to resource managers.
- The basic version of FVS allows users to understand management impacts on carbon stocks assuming current/historical climate conditions.
- The Fire & Fuels Extension for FVS links the Forest Vegetation Simulator with models of fire behavior, fire effects, fuel loading, and snag dynamics to allow for a more fire-relevant and in-depth exploration of management decisions on growth and carbon stocks.
- A beta version of Climate FVS (western states only, available for testing only; eastern test version coming soon) changes core growth, mortality, and regeneration data to respond to climate change (according a user-selected general circulation model, or GCM) , thereby allowing users to model the effects that management choices may have on carbon stocks under changing climate conditions.
Forest Management Service Center (FMSC), Fort Collins, CO; the FMSC is part of the US Forest Service Forest Management Staff