Wildfires and Invasive Plants in the Great Basin: …...Wildfires and invasive plants are two of the...
Transcript of Wildfires and Invasive Plants in the Great Basin: …...Wildfires and invasive plants are two of the...
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Wildfires and Invasive Plants in the Great Basin: Conserving Sagebrush
EcosystemsMike Pellant
Great Basin Restoration Initiative CoordinatorBureau of Land Management, NV State Office
Boise, [email protected]
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Presentation Organization
• Wildfire and invasive plants (cheatgrass risk assessment)
• Climate change implications
• What can we do to address these issues?
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Sagebrush inthe Great Basin
57 million acres of sagebrush in the Great Basin (54% of total remaining)
Rapidly disappearing biome –invasive plants & wildfires
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Wildfires and invasive plants are two of the biggest threats to Sage-Grouse
Greater Sage-Grouse: Ecology and Conservation of a Landscape Species and It’s Habitats (2011)
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Wildfires Are the Symptom…. Invasive Plants/Loss of Land Health is the Illness
Invasive species:Flammable exotic annual grassesExotic annual or perennial forbsJuniper encroachment
Cheatgrass Knapweeds
Juniper Encroachment
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Exotic Forbs
Yellowstar thistle invading cheatgrass
Russian Knapweed
Rush skeletonweed
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Russia (Near Caspian Sea)
3-4 inch annual precipitation zone.Cheatgrass Introduction
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Cheatgrass- Occupying New Environments
Yellowstone Park-7,000 ft. Juniper Woodlands
Saltdesert Shrub 1,000 ft. Forests
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The Cheatgrass-Wildfire Cycle
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N. Great Basin Cheatgrass Risk Model
Wisdom et al. 2005 –Physical Environment Model“Risk” determined by slope, elevation, & aspect associated with current cheatgrass occurrence
Don J MajorIdaho BLM & Great Basin Restoration Initiative
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Northern Great Basin Rapid Ecoregional Assessment
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Cheatgrass Risk – GSG Preliminary Priority Habitat
SagebrushPerennial grasslandConifer encroachment
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Cheatgrass Risk – GSG Preliminary General Habitat
Preliminary General Habitat
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Other Exotic Annual Grasses of Concern
Medusahead Wildrye North Africa Grass(Ventenata dubia)
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Invasives and Wildfires---What Does the Future Hold?
InvasiveSpecies Wildfires
Human Disturbances
Natives
Natives & Cheatgrass
Cheatgrass
Exotic Invasive Forbs
?
Climate Change
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Presentation Organization
• Intro to the fire and invasive issues
• Climate change implications
• What can we do to address these issues?
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Temperature-Already Risinghttp://www.nrdc.org/globalWarming/west/contents.asp
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Rising CO2 is predicted to increase the production of exotic annual grasses (Smith et al. 1987) and increase lignin content reducing the palatability of cheatgrass (Ziska et al.
2005)….more fires?
Climate Change- Increased CO2
Cheatgrass
CO2
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Cheatgrass Die-off in the Great Basin
Winnemucca, Nevada Area
Dead Live-USGS-EROS-Rocky Mtn. Res. Sta.
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Temperature/Vegetation ChangesNielson et al. (2005) predicts a 12% loss of sagebrush for each 10C increase in temperature. Sagebrush could be replaced by more xeric shrubs from the Mojave desert.
?
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Entering the Mega-Fire Era2007 Murphy Complex Fire
653,000 acres burned from
July 16-August 2,
2007
IDNV
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Presentation Organization
• Intro to the fire and invasive issues
• Climate change implications
• What can we do to address these issues?
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The wildfires of 1999 (1.7 million acres burned)
served as a wake-up call to the plight of
the Great Basin.
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What are we doing now?Traditional Reactive Approach = Treat, Attack, or Repair:
• Weed Control• Wildfire Suppression then• Wildfire Rehabilitation
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Is there a better approach?Implement Proactive Approach- Restoration:
• Minimize undesirable disturbances (fuel mgt.)• Improve resiliency and/or resistance to
disturbance(s)
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First-Maintain
Proactive Strategy Greenstrip
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Then-RestoreStrategically
Proactive Strategy
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The Great Basin Native Plant Selection & Increase Projecthttp://www.fs.fed.us/rm/boise/research/shrub/greatbasin.shtml
Mike Pellant, BLM GBRI, Boise, IDNancy Shaw, USFS Rocky Mtn. Research Station, Boise, ID
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Rangeland drill Minimum till drill
Drill Comparison Study
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Saylor Creek, ID
2010 Seeding
GREAT BASIN RESEARCH &
MANAGEMENT PARTNERSHIP
Sagebrush
Penstemon
Globemallow
Yarrow
Sagebrush
Yarrow
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Native Seeded Crested WG
Not Drill Seeded
Crested WG
Humbolt Fire Seeding Trial
South of Elko
Seeded in 2006Pictures taken in 2011
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Restoration of Sagebrush Ecosystems CourseBoise, ID—October 15-19, 2012
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Murphy Complex Fire-August 2007
Big Sagebrush
Crested Wheatgrass
The scale of wildfires must be matched by the scale of strategically placed fuel
management projects on the landscape!
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We need a system not a
project approach…
strategic and targeted program!
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Livestock Grazing & Greenstrips—1+1=3
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Nevada Congressman Amodei
What is needed to address wildfires and invasives to conserve sage-grouse?
SuppressionRehabilitation Restoration
Great Basin Issue
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“We are confronted by insurmountable opportunities”
Pogo
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Presentation Organization
• Intro to the fire and invasive issues
• Climate change implications
• What can we do to address these issues?
• NTT conservation measures
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Putting it all together-conserving sagebrush
habitat and sage-grouse…
National Technical Team:
1. Policy Recommendations
2. Conservation Measures
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Policy Recommendations Related to Invasives and Wildfires
Off-Site Mitigation: Better guidance to implement off-site restoration.
Fire Rehabilitation: Longer timeframe to implement projects and more flexibility to reestablish functioning sage-grouse habitat.
Fuels Management: More funding emphasis outside the Wildland/Urban interface emphasizing the “footprint of projects not the acres treated.
Soil Surveys & Ecological Site Descriptions: Complete and update across sage-grouse habitat.
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Conservation Measures- Habitat RestorationCross-Cuts All Programs
Prioritize restoration in “limiting factor” sage-grouse habitats where potential for success is acceptable.
Require use of native seed based on availability, adaptation, and probability for success (climate change).
Ensure that post-restoration management is compatible with habitat sustainability.
Manage to maintain important wildland harvested seed sources (e.g., sagebrush).
Monitor and control invasive plants on all projects.
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Conservation MeasuresFuels Management
Minimize impacts to sage-grouse habitat with fuel treatments.
Design fuel treatments to strategically and effectively reduce wildfire threats to the greatest area.
Consider the utility of using livestock to manage fine fuels in fuel management projects.
Fire OperationsPrioritize suppression in priority sage-grouse habitat afterlife and property.
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Conservation MeasuresFire Rehabilitation (ES&R)
Prioritize native seed allocation to sage-grouse habitat in years of limited seed selection and quantities.
Range ManagementPrioritize land health assessments in priority sage-grouse habitat and take appropriate action to meet sage-grouse habitat needs.
Implement good post-drought management to maintain integrity of priority sage-grouse habitat.
Implement treatments that conserve, enhance, or restore sage-grouse habitat