1 / 21

Ecosystem Introduction Function Disturbance Quantitative Analysis & Results Implications Ecosystem Management

Reciprocal Disturbance Interactions in Pinus albicaulis Ecosystems Nancy Bockino – M.S. Candidate Daniel Tinker – Advisor University of Wyoming Department of Botany. Ecosystem Introduction Function Disturbance Quantitative Analysis & Results Implications Ecosystem Management.

ostinmannual
Télécharger la présentation

Ecosystem Introduction Function Disturbance Quantitative Analysis & Results Implications Ecosystem Management

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reciprocal Disturbance Interactionsin Pinus albicaulis Ecosystems Nancy Bockino – M.S. CandidateDaniel Tinker – AdvisorUniversity of Wyoming Department of Botany

  2. Ecosystem Introduction • Function • Disturbance • Quantitative Analysis & Results • Implications • Ecosystem • Management

  3. Black Bear Harvesting Cones Photo: Ryan Sims Seed Dispersal Vector Clark’s Nutcracker Photo: A. Wilson

  4. Ecological Background Whitebark Distribution Greater Yellowstone Ecosystem – Northwest Wyoming

  5. EcologicalBackground Mountain Pine Beetle Native insect Photo from Allen Carroll

  6. Ecological Background Blister Rust Exotic Pathogen Photo Susan Hagle, USFS

  7. Which tree & stand characteristics determine beetle selection and the resulting mosaic of mortality?

  8. Project Objectives Quantify • Whitebark characteristics related to beetle selection • Beetle host-selection patterns • Relationship between blister rust & beetle selection Provide 1. Summary of whitebark condition in the GYE • Predictions of beetle selection • Ecosystem familiarity to aid restoration strategies

  9. Study Sites Sylvan Pass Breccia Teewinot Mt. Leidy

  10. Three Stand Types Whitebark & Non-Beetle Host Whitebark & Alternate Beetle Host Pure Whitebark

  11. Data Collection • Within A Stand (2-3 ha) • 24 plots systematically distributed • Variable radius • Tree = replicate

  12. Whitebark Status in theGreater Yellowstone Ecosystem

  13. Step 1: Chi-Square

  14. Step 2: Selection Ratio (# preferred host attacked÷ total attacked) (# preferred host available ÷ total available) = • Accounts for: • 1. stand density • 2. species composition • 3. sequence of attack • Selection Ratio 1.0 = No Preference • Host characteristics • blister rust severity • tree species

  15. Sylvan Pass Selection Ratio 1.0 = No Preference Step 2: Selection Ratio *α = 0.05 Teewinot Breccia Mt. Leidy Beetles prefer: 1. whitebark over lodgepole 2. whitebark with heavy blister rust

  16. Step 2: Selection Ratio 1.0

  17. Step 3: Multiple Logistic Regression Response Variable • Binary – Selected OR Not Selected Predictor Variables • Stand type (pure vs. non-host mix) • Blister rust severity (light vs. heavy) • Tree diameter

  18. Step 3: Multiple Logistic Regression

  19. Conclusions • Beetles select whitebark over lodgepole • Blister rust influences selection probability Positive relationship between heavy rust & beetle selection. • Interactions Between • Blister Rust & Beetle Selection • Enhance Disturbance Severity

  20. Implications • “Barometer of change” • Spatial & temporal prioritization of restoration sites • Alteration of genetic structure of remaining seed source • Redirection of succession

  21. Acknowledgements Funding sources: Joint Fire Science Program Grant # H1200040001 UWYO – NPS Research Grant Wyoming Native Plant Society Dan Tinker Ken Gerow David Legg Cory Bolen Bill Romme Kelly McCloskey – Grand Teton NP Liz Davey Andy Norman Contact Info: nbockino@uwyo.edu Michael Straw UWYO Ryan Sims CSU Bridger-Teton NF My Mom, Alida

More Related