wind energy development wildlife issues and concerns wind and prairie task force february 27, 2004...
TRANSCRIPT
![Page 1: Wind Energy Development Wildlife Issues and Concerns Wind and Prairie Task Force February 27, 2004 Edward A. Martinko State Biologist and Director Kansas](https://reader036.vdocuments.us/reader036/viewer/2022062407/56649cf85503460f949c8317/html5/thumbnails/1.jpg)
Wind Energy Development
Wildlife Issues and Concerns
Wind and Prairie Task ForceFebruary 27, 2004Edward A. MartinkoState Biologist and DirectorKansas Biological SurveyUniversity of Kansas
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Wildlife Issues and Concerns
• Landscape and habitat fragmentation
• Habitat avoidance
• Bird and bat collision
• Predation
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Landscape and Habitat Fragmentation
• Loss of habitat
• Reduced patch size
• Increased habitat edge
• Increased isolation of patches
• Modification of natural disturbance regime
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Effects of Habitat Fragmentation:
• Loss of habitat
• Reduced patch size
• Increased amount of habitat edge
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Effects of Habitat Fragmentation (cont.):
• Increased isolation of habitat patches reduces ability of wildlife to move between patches
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Effects of Habitat Fragmentation (cont.):
• Modification of natural disturbance regime
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The Flint Hills:
An Intact Natural Landscape
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Kansas City
Wichita
Untilled Landscapes of Eastern Kansas and Northeastern Oklahoma
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Habitat Avoidance
Results from:
• Visual obstructions
• Sound
• Roads and fences
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Wind Farms
• Development size: 5-15,000 acres
• Turbine number: 50-200+
• Tower height: 350-420+ ft:
• Access roads
• Utility lines
• Service and maintenance
Gray County Wind Farm
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Bird and Bat Collision
Mortality:
Issues:
Risk:
• Turbine blades• Transmission lines
• Tower height - Higher towers may kill more birds - 285’ tall vs. 350-420’ tall• Ridges• Blade speed - Slower blade rotation kills fewer birds
• Raptors• Breeding birds
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Significance of the Flint Hills: Birds
• Important breeding area for grassland birds
- Core distribution of the Greater Prairie Chicken
- Grassland birds are the most strongly declining group of birds in North America
• Migration corridor for selected species
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Breeding Grassland Birds• Greater Prairie Chicken
• Upland Sandpiper
• Grasshopper Sparrow
• Henslow’s Sparrow
• Dickcissel
• Eastern Meadowlark
Upland Sandpiper
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Migration Corridor
• American Golden Plover
• Buff-breasted Sandpiper
• Upland Sandpiper
• Eskimo Curlew (extinct?)
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Evidence for Concern
Grassland Birds in Minnesota
• Bird densities within about 100 m from each turbine were lower than those farther from turbines at wind farms with turbines and towers smaller than those proposed in the Flint Hills (Leddy et al., 1999).
Main species: Bobolink, Savannah Sparrow, Sedge Wren.
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Evidence for Concern
Bird Kills
Existing Studies: • Generally collision-related deaths not a threat, but Anomaly:
Altamont Pass, California
• 22,000 birds killed over 20 years • Golden eagles, hawks, and owls
Poor Planning and Siting!
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Evidence for Concern
Bat Kills
Existing Studies: • Generally collision-related deaths not a threat, but Anomaly:
Buffalo Ridge, Minnesota
• 184 bat collision fatalities over 4 years(Johnson et al., 2003)
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Predation
Raptors use:
• Poles
• Transmission lines
• Fences
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WildlifePlanning and Management Issues
• Avoidance
Siting: Key habitatsMigration corridorsStaging areasLandscape selection - Intact healthy native vs. cultivated, altered - Land management practices
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WildlifePlanning and Management Issues
• Avoidance
Design: No perches - Towers - NacellesBuried power linesMinimal roads and fencesTurbine density and spacing
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WildlifePlanning and Management Issues
• Avoidance
Operation and Maintenance:
Minimize disturbance - Vegetation - Soils - Wildlife - Scheduling
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WildlifePlanning and Management Issues
• Mitigation
Off-site habitat restoration
Management modifications
- Key habitats - Affected species - Adjacent lands
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Additional Information
Kansas Renewable Energy Working Group
www.krewg.org
Wildlife Management Institute
www.wildlifemanagementinstitute.org
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