Maps of early season invasive grasses and hot spots in the Mojave Ecoregion from 2009-2020
Dates
Publication Date
2023-01-18
Start
2009-01-01
End
2020-12-30
Citation
Villarreal, M.L., Waller, E.K., Smith T.C., Knight, A.C., Bishop, T.B., Duniway, M.C., Munson, S.M., and Gill, R.A., 2023, Maps of early season invasive grasses and hot spots in the Mojave Ecoregion from 2009-2020: U.S. Geological Survey data release, https://doi.org/10.5066/P9BPEULF.
Summary
Maps of invasive annual grasses were created using multi-season Landsat imagery over a 12 years period (2009-2020), and validated using an extensive network of plot data. Annual maps were used to identify persistent and productive populations of invasive annual grass, called hot spots, across entire Mojave Desert ecoregion. The data provided include a 12 band raster geospatial data file (.tiff) that represents classified early season invasive (ESI) grasses for each year from 2009-2020, and a single .tiff file of ESI hot spots made using the Getis-Ord Gi* Hot Spot classification method.
Summary
Maps of invasive annual grasses were created using multi-season Landsat imagery over a 12 years period (2009-2020), and validated using an extensive network of plot data. Annual maps were used to identify persistent and productive populations of invasive annual grass, called hot spots, across entire Mojave Desert ecoregion. The data provided include a 12 band raster geospatial data file (.tiff) that represents classified early season invasive (ESI) grasses for each year from 2009-2020, and a single .tiff file of ESI hot spots made using the Getis-Ord Gi* Hot Spot classification method.
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ESI_data.xml Original FGDC Metadata
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18.44 KB
application/fgdc+xml
DESI_and_HotSpots.zip
216.68 MB
application/zip
Purpose
Invasive annual grasses are a nuisance in the American Southwest through the promotion of ecosystem state changes and habitat loss. Non-native annual grasses such as Bromus rubens, Bromus tectorum, Schismus barbatus, and Schismus arabicus have invaded the Mojave Desert and increased fire occurrence and intensity. Thus, it is important to identify and characterize the areas where persistent invasion has occurred and subsequent fire risk has increased.
