impact of western juniper on hillslope hydrology: steens mountain, or
DESCRIPTION
Impact of Western Juniper on Hillslope Hydrology: Steens Mountain, OR. USDA-ARS Rangeland Research Unit Burns, OR USDA-ARS Northwest Watershed Research Unit Boise, ID. Background. 8.5 million acres in western juniper woodland 95% of the woodlands are 100 years old or less - PowerPoint PPT PresentationTRANSCRIPT
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Impact of Western Juniper on Impact of Western Juniper on Hillslope Hydrology: Hillslope Hydrology: Steens Mountain, ORSteens Mountain, OR
USDA-ARS Rangeland Research Unit Burns, OR
USDA-ARS Northwest Watershed Research Unit Boise, ID
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BackgroundBackground
• 8.5 million acres in western juniper woodland• 95% of the woodlands are 100 years old or
less• Juniper invasion results in
Significant reductions in shrub/understory production and cover
Reduced plant diversity Loss of wildlife habitat Increased erosion potential
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Project InfoProject Info
Rainfall simulation plots were run on eight replicates of cut and uncut treatments.
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Vegetation ResponseVegetation Response
Cut plot Un-cut plot
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Trough WaterTrough Water
Cut plot Un-cut plot
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Removing Juniper decreases runoff volume
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Removing Juniper reduces sheet erosion
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ConclusionConclusion
• Juniper invasion can result in a dramatic increase in runoff and erosion. The severity of erosion will likely be related to the loss of understory cover and the erosion potential of a site.
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Questions?Questions?
For more information contact:
Jon Bates or Tony Svejcar,
USDA-ARS Rangeland Scientists
(541) 573-8900
or
Fred Pierson
USDA-ARS Research Hydrologist
(208) 422-0700.
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