What’s the Reference?. Applying the Technique: 6 Steps. Identify the Evaluation Area Obtain or develop Reference Worksheet Obtain or develop Evaluation Matrix Complete characterization worksheets Rate 17 indicators Rate the 3 Rangeland Health Attributes.
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Indicators. For each indicator, describe the potential for the site. Where possible, (1) use numbers, (2) include expected range of values for above- and below-average years, when appropriate & (3) cite data. Continue descriptions on separate sheet.
1. Number and extent of rills:
2. Presence of water flow patterns:
3. Number and height of erosional pedestals or terracettes:
An Ecological Reference Worksheet is developed for eachecological siteusing soil surveys, ecological site descriptions, reference areas, research and expert knowledge.
Etc... for indicators 4-17
An ecological site can include more than one soil series, provided that the soils are similar
A soil map unit can include more than one ecological site. Soil map units often include many different soils, with different potentials to support plant communities
Even a soil seriescan include more than one ecological site. Soil surface texture often varies within a soil series. Soil surface texture is very important in distinguishing ecological sites.
RANGE SUCCESSION MODEL
(adapted from Westoby, Walker, Noy-Meir 1989)
The state where the functional capabilities represented by soil and site stability, hydrologic function, and biotic integrity are performing at a near-optimum level under the natural disturbance regime.
Ecological Site Description
Available at 1:250,000 scale
SSURGO Soil Mapping
Available at 1:24,000 scale
“A landscape unit in which ecological processes are functioning within a normal range of variability and the plant community has adequate resistance to and resiliency from most disturbances”
Special Management Areas
Establish baseline studies
(old timers and brilliant
temporal and disturbance
Reference Worksheet defines the “None to Slight” Category in the Evaluation Worksheet