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State-and-Transition Simulation Model of Buffelgrass in Saguaro National Park (2014-2044)

December 2, 2019

This is a spatially-explicit state-and-transition simulation model of buffelgrass dynamics in Saguaro National Park. Buffelgrass is an invasive grass spreading in the park. The model represents uninvaded and invaded parts of the desert ecosystem including transition pathways related to management activities and includes a connection to a fire behavior model. The model was built using the ST-Sim software platform linked to the FARSITE fire behavior model. The St-SIM file structure includes three components: 1) Buffelgrass.ssim.input folder that houses the input files used by St-SIM, 2) the Buffelgrass.ssim.output folder which houses the scenario outputs used by St-SIM for visualization and export of data, and 3) Buffelgrass.ssim file which is opened by St-SIM to provide an interface to the model and outputs. This study contains four model scenarios and their associated outputs. This particular database includes model scenarios for the Rincon Mountain District (RMD) of Saguaro National Park with fire.From ST-Sim allows users to develop and run spatially-explicit, stochastic state-and-transition simulation models (STSMs) of vegetation change, and is designed to simulate and compare possible vegetation conditions across a landscape over time by considering the interaction between succession, disturbances and management. ST-Sim is the latest in a 20-year lineage of STSM development tools that includes the Vegetation Dynamics Development Tool (VDDT), the Tool for Exploratory Landscape Scenario Analysis (TELSA), and the Path Landscape Model (Path). ST-Sim is intended as an upgrade to Path: in addition to all of the previous Path features, ST-Sim also provides a new option to run raster-based, spatially-explicit simulations.

Publication Year 2019
Title State-and-Transition Simulation Model of Buffelgrass in Saguaro National Park (2014-2044)
DOI 10.5066/P9ZBX43T
Authors Catherine S Jarnevich, Catherine M. Cullinane Thomas, Nicholas E Young, Dana Backer, Sarah Cline, Leonardo Frid, Perry Grissom
Product Type Data Release
Record Source USGS Digital Object Identifier Catalog
USGS Organization Fort Collins Science Center