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LANDFIRE Rapid Assessment Reference Condition Models
Entry ID: LANDFIRE_RARCM
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Summary
Abstract: The Rapid Assessment (RA) vegetation dynamics data help to synthesize the best
available knowledge of vegetation dynamics and quantify the natural range of
variability in vegetation composition and structure. Models consist of two
components: (1) a comprehensive description and (2) a quantitative,
state-and-transition (box) model, created in the public domain software VDDT
(Vegetation Dynamics Development Tool.

RA vegetation models were based on a simple, standardized five-box model that
combines three generic succession stages with two canopy cover classes. Each
class is specifically defined for individual models. Variations on this
standardized model were also developed. Models were developed in 2004-2005
during workshops across the conterminous United States where regional
vegetation and fire ecology experts synthesized the best available data on
vegetation dynamics and disturbances for vegetation communities in their
region. A peer review process following workshops garnered additional expert
input and offered an opportunity to refine models.

Quantitative models are based on inputs such as fire frequency and severity,
the probability of other disturbances, and the rate of vegetation growth.
Inputs are derived from literature review and expert input during and after
modeling workshops. Models simulate several centuries of vegetation dynamics
and produce outputs such as the percent of the landscape in each class and the
frequency of disturbances. Outputs are checked against available data whenever
possible, and are peer-reviewed during and after expert workshops.

Model descriptions and quantitative outputs were used in the RA to help define
and map potential natural vegetation groups, or the vegetation communities that
are likely to exist under the natural range of variability in biophysical
environments and ecological processes, including fire and other disturbances.
Models are used as reference conditions to calculate Fire Regime Condition
Class (FRCC), a standardized, interagency index to measure the departure of
current conditions from reference conditions (Hann et al 2004). For a complete
description of the methodology used to develop RA vegetation models, please
consult the LANDFIRE Rapid Assessment Modeling Manuala.

[Summary provided by The Nature Conservancy.]

Related URL
Link: GET SERVICE
Link: GET SERVICE
Description: Download Rapid Assessment Reference Condition Models for the Western and Eastern United States.

Link: VIEW RELATED INFORMATION
Description: Download Rapid Assessment Reference Condition Model descriptions.
Service Citation
Originators: The Nature Conservancy
Title: LANDFIRE Rapid Assessment Reference Condition Models
Release_Date: 2005-11-01
Provider: The Nature Conservancy
URL: http://www.landfire.gov/reference_models.php
ISO Topic Category
FARMING
BIOTA
BOUNDARIES
ECONOMY
ELEVATION
ENVIRONMENT
GEOSCIENTIFIC INFORMATION
IMAGERY/BASE MAPS/EARTH COVER
INLAND WATERS
PLANNING CADASTRE
TRANSPORTATION
Access Constraints
None. All data are provided as is. The Nature Conservancy makes no warranty
as to the currency, completeness, accuracy or utility of any specific data.
This disclaimer applies both to individual use of the data and aggregate use
with other data. It is strongly recommended that careful attention be paid to
the contents of the metadata file associated with these data.
Use Constraints
The Nature Conservancy shall not be held liable for improper or incorrect use
of the data described and/or contained herein.
Service Provider
GIS, The Nature Conservancy

Service Provider Personnel
Name: THE NATURE CONSERVANCY
Fax: (703) 841-2722
Email: xli at tnc.org
Contact Address:
The Nature Conservancy
Conservation Science and Stewardship Department
Latin American and the Caribbean Division
1815 North Lynn Street
City: Arlington
Province or State: VA
Postal Code: 22209
Country: USA
Distribution Media
Distribution_Media: online
Fees: No fees
Personnel
TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

THE NATURE CONSERVANCY -- LANDFIRE PROJECT
Role: TECHNICAL CONTACT
Phone: 303-444-2950
Email: helpdesk at landfire.gov
Contact Address:
The Nature Conservancy
LANDFIRE Project
2424 Spruce St.
City: Boulder
Province or State: CO
Postal Code: 80302
Country: USA
Creation and Review Dates
SERF Creation Date: 2006-02-08
SERF Last Revision Date: 2012-08-16
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