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- W2100433989 abstract "The LANDFIRE vegetation layers describe the following elements of existing and potential vegetation for each LANDFIRE mapping zone: environmental site potentials, biophysical settings, existing vegetation types, canopy cover, and vegetation height. Vegetation is mapped using predictive landscape models based on extensive field reference data, satellite imagery, biophysical gradient layers, and classification and regression trees. DATA SUMMARY The biophysical settings (BpS) data layer represents the vegetation that may have been dominant on the landscape prior to Euro-American settlement and is based on both the current biophysical environment and an approximation of the historical disturbance regime. It is a refinement of the environmental site potential map; in this refinement, we attempt to incorporate current scientific knowledge regarding the functioning of ecological processes - such as fire - in the centuries preceding non-indigenous human influence. Map units are based on NatureServe's Ecological Systems classification, which is a nationally consistent set of mid-scale ecological units (Comer and others 2003). LANDFIRES's use of these classification units to describe biophysical settings differs from their intended use as units of existing vegetation. As used in LANDFIRE, map unit names represent the natural plant communities that may have been present during the reference period. Each BpS map unit is matched with a model of vegetation succession, and both serve as key inputs to the LANDSUM landscape succession model (Keane and others 2002). The LANDFIRE BpS data layer is similar in concept to potential natural vegetation group layers produced in efforts related to fire regime condition class (Schmidt and others 2002; http://www.frcc.gov ). The BpS data layer is used in LANDFIRE to depict reference conditions of vegetation across landscapes. The actual time period for this data set is a composite of both the historical context provided by the fire regime and vegetation dynamics models and the more recent field and geospatial data used to create it. The weather data used in DAYMET were compiled from 1980 to 1997. Refer to spatial metadata for date ranges of field plot data and satellite imagery for each LANDFIRE map zone. REFRESH 2008 (lf_1.1.0): Improvements found in Refresh 2001 include resolving inconsistencies along the international borders and adjusting the extent of barren and water land cover types. For details on methods, see Process Description for LANDFIRE Refresh 2008 (lf_1.1.0)." @default.
- W2100433989 created "2016-06-24" @default.
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- W2100433989 date "2010-01-01" @default.
- W2100433989 modified "2023-09-26" @default.
- W2100433989 title "LANDFIRE Refresh 2008 (lf_1.1.0) Biophysical Settings (lf_110bps)" @default.
- W2100433989 hasPublicationYear "2010" @default.
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