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Irvine Ranch Conservancy Monitoring on the IRNL

Irvine Ranch Conservancy Monitoring on the IRNL. HABITATS. Smog. Human Access. ↑ FIRE FREQUENCY. Loss of Predators. ?. Climate Change. Habitat Loss & Degradation. Invasive Species. IRC MONITORING APPROACH.

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Irvine Ranch Conservancy Monitoring on the IRNL

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  1. Irvine Ranch Conservancy Monitoring on the IRNL

  2. HABITATS

  3. Smog Human Access ↑FIRE FREQUENCY Loss of Predators ? Climate Change Habitat Loss & Degradation Invasive Species

  4. IRC MONITORING APPROACH • We try to make monitoring QUESTION-BASED and informative for adaptive management

  5. Measure Success of Our Adaptive Management in: • Increasing native habitat diversity, structure & function • Decreasing key invasive species • Decreasing impacts of frequent fires • Maintaining wildlife & sensitive species • Minimizing human access impacts

  6. BIODIVERSITY AND SYSTEM HEALTH What are the thresholds for community stability and resilience in relation to relative levels of non-native abundance and to other threats? USGS USGS

  7. BIODIVERSITY AND SYSTEM HEALTH • Habitat-specific long-term monitoring (CSS, oak woodland, perennial grassland) • Invasive species surveys • Vegetation mapping • Aerial photo analysis / long-term photos • Floristic inventories (post-fire / opportunistic) • Wildlife monitoring

  8. Habitat Monitoring • CSS • Transects across a gradient of cover • Transects within burned and unburned CSS (SDNHM small mammal arrays) • Other long-term transects? • Grassland • Polygon-level post-fire grassland survey • Oak woodland

  9. Restoration Monitoring • Point intercept transects • CNPS rapid assessments • Quadrats • Photo-points • Some external soil flora monitoring • Arthropod monitoring

  10. Invasive Surveys

  11. Sensitive Plant/Floristic Surveys

  12. BIODIVERSITY AND SYSTEM HEALTH • Periodic small mammal surveys (post-fire and 3-5 yr) • Raptor surveys (annual) • Wildlife activity (quarterly) • External surveys (e.g., Sea and Sage quarterly bird counts) • Luxury surveys • Trapdoor spiders • Butterfly transects

  13. STRESSORS AND IMPACTS • Wildfire occurrence/extent/impact • On wildlife, rodents, raptors, habitat etc. • Human recreation impacts • Wildlife response to stressors

  14. How does human activity affect wildlife activity, movement patterns, and persistence? How do these patterns vary over spatial scale and over shorter versus longer term time frames? χ2 = 81.79, df = 2, P < 0.01 Prop. Days Obs. Daily Human Access

  15. FOCAL RESOURCES

  16. OUR LONG-TERM NEEDS • Long-term and experimental data to address management concerns about habitat trajectories. • Collaboration with establishing, maintaining and analyzing long-term studies designed to address both management and fundamental research questions. • Updates to researcher study sites and findings.

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