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UC Research Station at Anza Borrego
How does human proximity affect animal behavior/distribution at Anza Borrego?
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Our Question: Does animal abundance vary depending on distance from field station? *Related: how is wildlife distributed? We expect more evidence of animals as we move further away from the station Our results might also help us understand how wildlife distributed around the Anza Borrego Research Station
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Our plan... Camera traps and water for visual evidence
Scat ID for physical evidence Simple and Repeatable Our data and conclusions will be important when planning conservation projects Our experiment is simple and repeatable in different settings Our test will show us how close animals come to the research station for resources. This is relevant to conservation efforts for species of concern.
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Method
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Animal Detection by Camera
Camera setup: 20 second clips; 30 second intervals Cameras secured with rocks and straps Aluminum pan of water placed at each camera trap location
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Animal Detection by Camera
Data collection: SD card data collected onto computer daily at location Footage erased from SD card Camera reset
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Animal Detection by Camera
Finding activity: Identifiable vertebrates were counted if they occurred at least 5 minutes apart per camera. Data entered on Excel.
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Animal Detection by Scat
4 5 Collecting 3 2 1 For scats, we
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Animal Detection by Scat
Collecting Location (near, far, furthest) description
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Animal Detection by Scat
Collecting Identifying Elbroch, M., Evans, J., & Kresky, M. (2012). Field guide to animal tracks and scat of California. Berkeley: University of California Press.
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Results
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Animal Detection by Camera
Distance from station does not significantly explain sighting abundance (ANOVA, p >> 0.05). Sighting Abundance Distance
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Animal Detection by Camera
Coyotes may stay farther away than rabbits. Sighting Abundance Distance
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Animal Detection by Camera
Abundance varies significantly between the transects (Wilcoxon, p < 0.05).
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Animal Detection by Camera
Abundance varies significantly between the transects (Wilcoxon, p < 0.05). ←-(Wilcoxon, p < ). Rabbits Location
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Animal Detection by Camera
Although not significant, coyotes show a possible tendency to prefer trails over off-trail areas (Wilcoxon, 0.3 > p > 0.2). Coyotes Location
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Animal Detection by Scat
Total scat count by Distance Total Scat Counting 0.10 > p > 0.05 Near Far Furthest
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Animal Detection by Scat
Species vs Location p<0.0001 Spotted Skunk Species Desert Woodrat Rabbit Transect Number
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Animal Detection by Scat
Rabbit Woodrat Number of Different Species Transect Transect
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Discussion No significant relationship between overall animal abundance and proximity to research station
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Relationship between Blacktail Jackrabbit scat and captured videos
Jackrabbits are using a specific area of the desert Diet influence Predator influence Blacktail Jackrabbit Desert Woodrat Species Abundance 1 2 3 4 5 Transect
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Effect of Habitat on Scat Richness and Abundance
More animals in general are using the main washes Desert Woodrat scat was common among many transects Blacktail Jackrabbit scat found on one transect Higher richness found with scat data Species Richness 1 2 3 4 5 Transect
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Effect of Distance on Scat Richness and Abundance
Distance from the UCI station does not influence scat abundance or richness P value .1 < P > .05 More scat data and replication needed
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Confounding Variables:
Human Activity
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Bad Angles
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Repeatability and Future Studies
Specificity to environment Anza Animal behavior and adaptations Limiting factors Water Food Shade - bird article Space Camera traps at scat locations
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Repeatability and Future Studies
Likely to see similar results in same location Simple methods Expect to see different results in different locations Biodiversity Behavior Human “noise” Future years in same locations Dry/wet years
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Conclusion Humans in nature Planning new and current sites
Creating conservation habitats
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Acknowledgement Dr. Dina Roberts Dr. Blake Suttles Spencer
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