PReP GIS Tool v1 0

<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>First, select the fire for the analysis. Data for each fire are loaded into the PReP tool a priori and include rasters on landscape units, the number of fires in 40 years, time since last fire, and non-native species. </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Next, enter the landscape unit for the analysis for each vegetation-topographic unit. Currently, only 'WHR types x aspect x topography' is supported. Users enter: the percentage of resprouting shrub species (facultative seeding and obligate resprouting species); fire history (number of fires in the last 40 years and time since last fire); pre- and post-fire drought conditions; and a threshold percentage of non-native grasses.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>The PReP tool interface loads with default percentages of resprouting shrub species. These data are based on several sources including: an analysis of percent cover of obligate resprouter, facultative seeder, and obligate seeder species in USFS Forest Inventory and Assessment (FIA) shrubland plots; ecological field guides for the Angeles, San Bernardino, and Cleveland national forests (Gordon and White 1994) and the Los Padres National Forest (Borchert et al. 2004); and input from USFS Pacific Southwest Program ecologists. Note that these pre-populated percentages for each landscape unit only provide a guideline, and field surveys are highly recommended to confirm their accuracy for the target fire being assessed. For each of the vegetation-topographic units, enter the percentage of resprouting shrub species (&gt;40%, 10-40%, or &lt; 10%) or accept the default values.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Drought conditions are based on the monthly Palmer Drought Severity Index (PDSI) for the south coast ecoregion (https://www.ncei.noaa.gov/access/monitoring/historical-palmers/). If 4 or more months of the pre-fire growing season (November-May) are characterized by drought conditions (PDSI &lt;-3), then this is classified as pre-fire drought. Post-fire drought is evaluated for the first- and second-years post-fire in the same way. </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Next, the user is asked whether the fire occurred in the wet season (November-May) or dry season (June-October).</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Finally, the user enters the threshold percentage of non-native grasses, above which regeneration of shrub species is negatively impacted. This threshold is applied to a layer of herbaceous cover developed from Landsat TM imagery using intra-annual phenological differences in NDVI between herbaceous forbs and grasses and evergreen shrublands (Park et al. 2018). </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Consult the Postfire_Restoration_Priorization_Tool_Technical_Guide.pdf for additional details.</SPAN></SPAN></P><P /><P><SPAN /></P></DIV></DIV></DIV>

There are no code samples for this tool.

chaparral, fire, post-fire regeneration, prioritization, resource management, restoration, type-conversion, SoCal

Emma Underwood and Allan Hollander, Institute of the Environment, University of California, Davis Charlie Schrader-Patton, USDA Forest Service Western Wildlands Environmental Threat Assessment Center and Oregon State University College of Forestry.

<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN STYLE="font-weight:bold;"><SPAN>Map use disclaimer: </SPAN></SPAN><SPAN><SPAN>This map is intended to depict physical features as they generally appear on the ground and may not be used to determine title, ownership, legal boundaries, legal jurisdiction, including jurisdiction over roads or trails, or access restrictions that may be in place on either public or private land. Obtain permission before entering private lands and check with appropriate government offices for restrictions that may apply to public lands. Lands, roads, and trails within the boundaries of a national forest may be subject to restrictions on motor vehicle use. Obtain a Motor Vehicle Use Map or inquire at the local Forest Service office for motor vehicle access information. Natural hazards may or may not be depicted on the map, and land users should exercise due caution. This map is not suitable for navigational use.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN STYLE="font-weight:bold;"><SPAN>Data Disclaimer: </SPAN></SPAN><SPAN><SPAN>The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>USDA is an equal opportunity provider, employer, and lender. </SPAN></SPAN></P><P /><P><SPAN /></P></DIV></DIV></DIV>