NRCS eVegGuide Environmental Constraints
Elevation
    This parameter constrains selection by limiting the species search to those species that have been observed and documented by Calflora to have a range of elevation within California that encompasses (i.e., between observed minimum and maximum range values) the pinpointed revegetation site elevation.


Climate
    This parameter constrains selection by limiting the species search to those species that have been observed and documented by Calflora to occur in the precipitation zone(s) and associated 4ETa zone(s) - derived from PRISM Climate Group databases -- within which the pinpointed revegetation site occurs.

    For more information see the Calflora help page About Layers / CLIMATE.



Soil
    This parameter constrains selection by limiting the species search to those species that have been observed and documented by Calflora to occur on the soil map unit - and other map units with similar soil texture and other physical and chemical characteristics - derived from NRCS SSURGO Soil Survey data and CA Soil Resource Lab data - on which the pinpointed revegetation site occurs.

    For more information see the Calflora help page About Layers / SOIL.



Ecoregion 4
    This parameter constrains selection by limiting the species search to those species that have been observed and documented by Calflora to occur within the same Level IV EPA Ecoregion polygon boundaries - as delineated on the Level IV EPA Ecoregion map (Figure 12) - as on which the pinpointed revegetation site occurs. This parameter, if enabled, cannot be simultaneously used with the '40-mile' radius parameter


40 Miles Radius
    This parameter constrains selection by limiting the species search to those species that have been observed and documented by Calflora to occur within a 40-mile radius of the pinpointed revegetation site. This parameter, if enabled, cannot be simultaneously used with the 'Ecoregion 4' parameter.


4ETa Zone
    This parameter constrains selection by limiting the species search to those species that have been observed and documented by Calflora to occur within the same 4ETa Zone as on which the pinpointed revegetation site occurs