Nicholas E Young

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

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)...

Tags: Arizona, Buffelgrass, Saguaro National Park, State-and-transition simulation model, USGS Science Data Catalog (SDC), All tags... biota, fire, invasive species, Fewer tags

Data for modeling fountain grass and bishop's goutweed in the contiguous US

This data bundle contains the merged data sets to create models for bishop's goutweed and fountaingrass using the VisTrails:SAHM [SAHM 2.1.0]. We developed species distribution models for both species following a workflow designed to balance automation and human intervention to produce models for invasive plant species of concern to U.S. land managers. Location data came from existing databases aggregating species occurrence information. Predictors came from a national library of potential environmental variables based on what environmental factors might limit plant species' distributions in different parts of the U.S. including climatic, topographic, soil, land use, and anthropogenic factors. The outputs of these...

Categories: Data; Tags: Aegopodium podagraria, Joshua Tree National Park, Joshua Tree National Park, CA, Pennisetum setaceum, Pictured Rocks National Lakeshore, All tags... Pictured Rocks National Lakeshore, MI, SAHM, Software for Assisted Habitat Modeling, Species Distribution modeling, USGS Science Data Catalog (SDC), VisTrails, biota, fountaingrass, goutweed, habitat suitability, Fewer tags

Simulation models for buffelgrass and alternative management strategies for Saguaro National Park, AZ

This is a spatially-explicit state-and-transition simulation model of buffelgrass dynamics and alternative management actions in Saguaro National Park, AZ. Buffelgrass is an invasive grass spreading in the park. This work built on previous efforts that first developed a state and transition simulation model linked to FARSITE fire behavior model to describe buffelgrass dynamics in the park and a secondary effort to evaluate these dynamics in light of uncertainties in the model. This model represents uninvaded and invaded parts of the desert ecosystem and adds alternative management actions to the previously built models (cross reference). The model was built using the ST-Sim software platform linked to the FARSITE...

Tags: AZ, Arizona, Ecology, FARSITE, Saguaro National Park, All tags... State and transition simulation model, USGS Science Data Catalog (SDC), biota, invasive species, Fewer tags

State-and-Transition Simulation Models of Buffelgrass in Saguaro National Park (2014-2044) to explore ecological uncertainties

This is a spatially-explicit state-and-transition simulation model of buffelgrass dynamics in Saguaro National Park, AZ. Buffelgrass is an invasive grass spreading in the park. The model represents uninvaded and invaded parts of the desert ecosystem 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...

Tags: Arizona, Fire, Invasive species, Saguaro National Park, Simulation model, All tags... State-and-transition simulation model, USGS Science Data Catalog (SDC), Fewer tags

Data for forecasting buffelgrass distribution with global distribution data, local data, and physiological information

This data bundle contains some of the inputs, all of the processing instructions and all outputs from two VisTrails/SAHM workflows, one creating a global habitat suitability model for buffelgrass and another creating a habitat suitability model for buffelgrass in Saguaro National Park, AZ. The bundle documentation files are: 1) '_archive_bundle_metadata.xml' (this file) which contains FGDC metadata describing the archive bundle. 2) 'modelSelectionCV_MakeAbsPntsFilt100_2.csv' containing the field data used as inputs for the Saguaro National Park model. 3) '_archive_raster_inputs.csv' a list of the raster inputs that were used to generate these model results. These are not included in the archive bundle due to size...

Tags: Buffelgrass, Cenchrus ciliaris, SAHM, Saguaro National Park, Saguaro National Park, AZ, All tags... Saguaro National Park, AZ, Software for Assisted Habitat Modeling, Species Distribution modeling, USGS Science Data Catalog (SDC), VisTrails, biota, habitat suitability, Fewer tags