Molybdenum Ridge (time-lapse detections)
Basic information
Sample name: Molybdenum Ridge (time-lapse detections)
Sample aka: Moly Ridge

Reference: J. S. Dertien, C. F. Bagley, J. A. Haddix, A. R. Brinkman, E. S. Neipert, K. A. Jochum, and P. F. Doherty Jr. 2019. Spatiotemporal habitat use by a multitrophic alaska alpine mammal community. Canadian Journal of Zoology 97(8):713-723 [ER 3300]
Geography
Country: United States
State: Alaska

Coordinate: 63.82° N, -146.65° W
Basis of coordinate: estimated from map
Geography comments: "in Donnelly Training Area... of U.S. Army Fort Wainwright... on the northern foothills of the Alaska Range, approximately 50 km southwest of Delta Junction"
elevation 800 to 1900 m
Climate and habitat
Habitat: montane grassland
Protection: other protected area
Substrate: ground surface
Habitat comments: "At both locations we predominately sampled in alpine habitats"
Methods
Life forms: carnivores, rodents, ungulates, other small mammals
Sampling methods: no design, automatic cameras
Sample size: 665
Years: 2013, 2014
Seasons: winter, spring, summer, autumn
Nets or traps: 27
Net or trap nights: 1920
Camera type: digital
Cameras paired: no
Trap spacing: 0.500
Sampling comments: "We installed cameras during July and August 2013... cameras operated until October 2014... Camera locations were determined through a spatially balanced design generated via the Reversed Randomized Quadrant-Recursive Raster (RRQRR) algorithm... Sampling sites were > 500 meters apart except for two pairs of cameras, where one camera per pair was censored... We programmed camera traps to trigger by movement and to capture a time-lapse image every hour for the first 12-months of sampling. We increased the rate of time-lapse images to every 30 minutes for the last 3-months of sampling after noting the available space on the memory cards... our 54 cameras operated for 19, 199 camera trap days and captured ~825, 000 photos"
I presume there were 27 cameras per field area (9599.5 trap days each); the triggering period was 12/15 months, so there were 7679.6 triggered trap days and 1919.9 time-lapse trap days per field area"
Metadata
Sample: 3675
Contributor: John Alroy
Enterer: John Alroy
Created: 2020-10-20 17:01:43
Modified: 2020-10-20 17:01:43
Abundance distribution
11 species
1 singleton
total count 665
standardised richness: 4.0
Fisher's α: 1.872
geometric series k: 0.5619
Hurlbert's PIE: 0.6664
Shannon's H: 1.3817
Good's u: 0.9985
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