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Beetles and Spiders as Indicators of Forest Recovery on Prince of Wales, Alaska Jill Stockbridge Biology, MS Entomology Department University of Alaska Museum
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Introduction Introduction Background Background Objectives Objectives Approach Approach Products Products Currently Currently Outline
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Invertebrates comprise 95% of all animal species known today Invertebrates comprise 95% of all animal species known today Indicators of ecological change Indicators of ecological change Global conservation planning Global conservation planning - Few Studies Introduction
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Forestry practices Forestry practices -Significant human disturbance Converts old growth stands to: Converts old growth stands to: - Clear cuts - Young even-aged stands Decline of old growth forest specialists Decline of old growth forest specialists Background
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Old growth
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Clear Cut
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Secondary Growth
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Background continued … Logging in the Tongass National Forest Logging in the Tongass National Forest Tongass-Wide Young-Growth Studies (TWYGS) Tongass-Wide Young-Growth Studies (TWYGS) TWYGS sites in South East Alaska TWYGS sites in South East Alaska -Prince of Wales Island Beetles and Spiders Beetles and Spiders -indicators of recovery
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1.Compare indicator species 2.Compare invertebrate to vertebrate 3.Baseline Inventory Objectives
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Compare Indicator Species 3 Controls (6 replicates each): - Old growth - Clear Cuts - Secondary growth 3 Treatments (2 replicates each): - 14X14’ - 16X16’ - 18X18’ Total: 24 Sites
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14X14’ Treatment
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16X16’ Treatment
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18X18’ Treatment
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POW Sites
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Collection Methods: Collection Methods: - 2 Lindgren Funnels (on loan from USDA) - 4 pairs of pitfall traps - Berlese Funnels Vegetation surveys Vegetation surveys Identify beetles and spiders to species Identify beetles and spiders to species Statistics: rarefraction curves, Shannon index, and Bray-Curtis index Statistics: rarefraction curves, Shannon index, and Bray-Curtis index Compare Indicator Species
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Drs. Flaherty and Ben-David Drs. Flaherty and Ben-David -University of Wyoming Deer mice response Deer mice response Same sites and sampling periods Same sites and sampling periods Compare Invertebrate to Vertebrate
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Baseline Inventory Coffman Cove Thorne Bay Craig Hydaburg
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Collection Methods: Collection Methods: - Flight Intercept Trap (FIT) - Sweep netting - Black light - Pollinator bowls - Beating - Carrion - Hand Collecting Baseline Inventory
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Identify to species Identify to species Help with determinations Help with determinations - beetles Derek Sikes - spiders Joey Slowik - butterflies/moths Jim Kruse Arctos Database Arctos Database Baseline Inventory
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Forestry practices and biodiversity of beetles and spiders Forestry practices and biodiversity of beetles and spiders Improve management Improve management Alaska’s arthropod checklist Alaska’s arthropod checklist Products
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Project began April 2010 Project began April 2010 Defend Thesis Fall 2012 Defend Thesis Fall 2012 Over 100 species of beetles Over 100 species of beetles Spiders are in queue to be determined by Joey Slowik Spiders are in queue to be determined by Joey Slowik New species of Mecoptera? New species of Mecoptera? So Far….
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Family Boreidae Caurinus sp. Det. Mike Ivey
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Lateral View
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Funding from Alaska Department of Fish and Game Funding from Alaska Department of Fish and Game Dr. Derek Sikes (major advisor) Dr. Derek Sikes (major advisor) Joey Slowik Joey Slowik Dr. Jim Kruse Dr. Jim Kruse Casey Bickford Casey Bickford Diane Wagner Diane Wagner Dr. Liz Flaherty Dr. Liz Flaherty Dr. Merav Ben David Dr. Merav Ben David Dan the mechanic from POW Dan the mechanic from POW Acknowledgements
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