We have gathered additional information about the study area here. Try the links at left or browse below!

Click links for a larger view.

Map of BLM ownership in Medford District

Medford District BLM land ownership and Resource Areas (Southwest Oregon) (larger). Originally at the Medford District BLM website.

Research related to that described on this website is also being carried out through the Applegate Adaptive Management Area Research and Monitoring program, sponsored by the USDA Forest Service, the USDI Fish and Wildlife Service, and the USDI BLM.

Researchers at the Klamath Bird Observatory, in collaboration with the Forest Service, BLM, National Park Service, and others, are investigating the ecological effects of wildfire and fire management by implementing a study of bird distribution as it relates to fire suppression, fuels treatment, and wildfire rehabilitation in the Klamath Ecoregion of southern Oregon and northern California (or check out the publication, "Using conservation plans and bird monitoring to evaluate ecological effects of management: An example with fuels reduction activities in southwest Oregon").

You might also be interested in learning about the Applegate Partnership and Watershed Council, a community-based non-profit organization involving industry, conservation groups, natural resource agencies, and residents cooperating to encourage and facilitate the use of natural resource principles that promote ecosystem health and diversity.

Level IV Ecoregions of Oregon

Level IV Ecoregions of Oregon (larger view, PDF). (Source: US EPA.). Also check out the EPA's ecoregion mapping projects.


Downloadable GIS data for the entire state is also publically available through the Oregon Geospatial Data Clearinghouse, a project of the Oregon Geospatial Enterprise Office. Aerial imagery for 2005, 0.5 m resolution, is available through the Oregon Imagery Explorer.


Check out the Fire Effects Information System (FEIS), a searchable database of the USDA Forest Service that summarizes and synthesizes research about the biological and ecological relationships of living organisms to fire.

See the California Chaparral Institute webpage for much more information and many more resources on this vegetation type.

For a veritable library of oak-related information sources, see the USDA Forest Service's Bibliography for Oregon White oak (Quercus garryana) and Other Geographically Associated and Botanically Related Oaks.


See also the Atlas of maps (covering historical vegetation, physical-climate, ecological-biological, and political-social themes for the entire state) from the Oregon Department of Forestry.

Tools and Resources for Southwest Oregon

GIS was used to investigate patterns of vegetation distribution on the landscape in relation to site conditions and disturbance history within the Applegate Adaptive Management Area. These mapping and analysis efforts produced several new or geoprocessed GIS layers, listed below. Contact Eric Pfaff or Dr. Paul Hosten for access to these data. For more information on this research project click here.

Layer Extent: 42.08° N, 123.26° W to
42.40° N, 122.76° W (located within the Applegate Adaptive Management Area). Also see a map of the study area.

Data Available

Vegetation Associations.
Vegetation associations were defined and characterized based on species composition data gathered through extensive field surveys. Multivariate analysis techniques were used to group vegetation into 13 associations and named according to dominant or unique species. Each association listed below is mapped as a polygon feature.

Fescue grassland
Oat grass grassland
Rabbitbrush/buckwheat bald

Buckbrush chaparral
Mountain mahogany/Brewer's oak
Manzantia chaparral

Manzanita/white oak
Open oak/chaparral
Disturbance-mediated woodland/chaparral

Oregon white oak woodland
Black oak woodland
Madrone woodland
Canyon live oak woodland

Environmental Variables
The environmental variables were collected from various sources and standardized into raster format (30m by 30m resolution) by resampling with ArcGIS ArcToolbox using bilinear interpolation.

Slope shape
Elevation (in meters)
Sixth field watershed
Topographical position index
Heat load

Actual annual evapotranspiration
Summer actual annual evapotranspiration
Annual precipitation

Cation exchange capacity
Total clay
Total silt
Total sand
Drainage class
Parent material
Upper soil horizon depth

Disturbance Variables
Spatial extent of management or natural disturbance was mapped from BLM records.

Wildfire history 1895 - 2005
Fire frequency
Maximum fire interval
Years since a wildfire

Management (current as of 2005)
Broadcast burn
Mechanical mastication
Slash (hand cut)
Slash hand pile burn (hand cut pile burn)

Image from GIS analysis
Plant species list

Click for a plant species list for non-coniferous communities in the geographic extent defined by the GIS mapping and analysis research (see map). Data collected and compiled by Eric Pfaff.


Washington lily photographed by D. Coen.

Additional Resources
Landscape view of vegetation diversity

Landscape view of vegetation diversity within the Applegate Adaptive Management Area. Photo by K. Perchemlides.

Map of Ashland Resource Area fuels reduction projects

Map of BLM fuels reduction projects in the Ashland Resource Area (larger). Current as of 10/2006.

Applegate Valley double rainbow

Fire history overlay on an aerial photograph taken near Ruch, OR. Colored polygons are fires that burned from 1895 or earlier to those that burned recently .

Applegate Valley double rainbow. Photo by C. Duren.

Background (also see selected bibliographies on oaks and on chaparral and Klamath region fire)

The Interior Foothills of the Klamath Mountains Ecoregion (PDF) of southwestern Oregon and northern California are located at the junction of the Cascade, Sierra, and Coastal mountain ranges. The joining of these major mountain axes and the wide range of soil types that occur in the Ecoregion has resulted in unusually diverse plant life. Southwestern Oregon's interior valleys are dominated by a Mediterranean climate of cool, wet winters and hot, dry summers; this is in the driest climatic zone of Klamath region, and is floristically linked to landscapes to the south. Complex topography and microclimates result in boundaries that are often abrupt between plant communities coniferous forest, hardwood woodlands, chaparral shrublands, and grasslands. The area supports some of the least understood ecosystems in the Pacific Northwest.


Page by Olivia Duren. Updated 4/2010.


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