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Broad-Scale Assessment of Rangeland Health, Grand Staircase-Escalante National Monument, USA
Author
Miller, Mark E.
Publisher
Society for Range Management
Publication Year
2008-05-01
Body

Over a 3-yr period, the qualitative assessment protocol ‘‘Interpreting Indicators of Rangeland Health’’ was used to evaluate the status of three ecosystem attributes (soil/site stability, hydrologic function, and biotic integrity) at over 500 locations in and adjacent to Grand Staircase-Escalante National Monument (Utah). Objectives were to provide data and interpretations to support the development of site-specific management strategies and to investigate broad-scale patterns in the status of different rangeland ecological sites. Quantitative data on ground cover, plant community composition, and soil stability were collected to aid the evaluation of qualitative attributes and improve consistency of the assessment process. Ecological sites with potential vegetation dominated by varieties of big sagebrush (Artemisia tridentata Nuttall) had the highest frequencies (46.7%-75.0%) of assessments with low ratings (moderate or greater departure from expected reference conditions) for all three ecosystem attributes. In contrast, sites with potential vegetation characterized by Utah juniper ( Juniperus osteosperma [Torrey] Little) and/ or Colorado pinyon (Pinus edulis Engelmann) had low frequencies (0.0%-7.8%) of assessments with low ratings for all attributes. Several interacting factors likely contributed to the development of patterns among ecological sites, including 1) potential primary production and thus long-term exposure to production-oriented land uses such as livestock grazing; 2) the presence of unpalatable woody plants capable of increasing and becoming persistent site dominants due to selective herbivory, absence of fire, or succession; 3) soil texture through effects on hydrologic responses to livestock grazing, trampling, and other disturbances; and 4) past management that resulted in high livestock use of ecological sites with sensitive fine-loamy soils following treatments designed to increase forage availability. This case study illustrates an extensive application of an assessment technique that is receiving increasing use worldwide, and results contribute to an understanding of factors contributing to patterns and processes of rangeland degradation.  The Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.2111/07-107.1
Additional Information
Miller, M. E. (2008). Broad-scale assessment of rangeland health, Grand Staircase–Escalante National Monument, USA. Rangeland Ecology & Management, 61(3), 249-262.
ISSN
0022-409X
OAI Identifier
oai:repository.arizona.edu:10150/642949
Journal Volume
61
Journal Number
3
Journal Pages
249-262
Collection
Rangeland Ecology & Management (REM)
Journal Name
Rangeland Ecology & Management
Keywords
Artemisia tridentata Nuttall
big sagebrush
ecological sites
ecosystem assessment
rangeland condition
soil properties