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Molybdenum Ridge (triggered detections)
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Basic information
Sample name: Molybdenum Ridge (triggered 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
Coordinate basis: 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

Environment
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: 1092 captures or sightings

Years: 2013, 2014

Seasons: winter,spring,summer,autumn

Nets or traps: 27

Net or trap nights: 7680

Camera type: digital

Cameras paired: no

Trap spacing: 0.5

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 number: 3674

Contributor: John Alroy

Enterer: John Alroy

Created: 2020-10-20 16:57:07

Modified: 2020-10-20 06:00:59

Abundance distribution
14 species
3 singletons
total count 1092
extrapolated richness: 19.7
Fisher's α: 2.265
geometric series k: 0.6223
Hurlbert's PIE: 0.7349
Shannon's H: 1.6705
Good's u: 0.9973
Each square represents a species. Square sizes are proportional to counts.
Register
Current reference: Herzog et al. 2003 (ER 1261)