Organ Pipe Cactus National Monument (Flats)
Basic information
Sample name: Organ Pipe Cactus National Monument (Flats)

Reference: T. J. Orr, S. D. Newsome, and B. O. Wolf. 2015. Cacti supply limited nutrients to a desert rodent community. Oecologia 178:1045-1062 [ER 1673]
Country: United States
State: Arizona

Coordinate: 32° 5' 30" N, 112° 46' 9" W
Basis of coordinate: stated in text
Geography comments: "We sampled two nearby sites (5 km apart), which we will refer to as the Uplands and Flats sites"
elevation of the Flats site was 610 to 660 m
Climate and habitat
Habitat: desert/xeric shrubland
Substrate: ground surface
MAT: 20.6
MAP: 234.0
Habitat comments: "Arizona upland or saguaro/paloverde forest" with "columnar cacti" and "leguminous trees"
climate data are for Organ Pipe Cactus National Monument and are from Comstock and Ehleringer (1992, PNAS)
Life forms: rodents
Sites: 1
Sampling methods: line transect, quadrat, Sherman traps
Sample size: 493
Years: 2005, 2006
Days: 36
Seasons: winter, spring, summer, autumn
Net or trap nights: 1639
Sampling comments: "We trapped live rodents monthly with Sherman traps (8 cm 10 cm 31 cm) from May 2005 through September 2006. Total trapping effort included 3277 trap nights spread over 36 nights for an average of 2 days of trapping per month... Both grids and transects were used to sample the rodent community at each site, and 130 traps were used each night. Traps in the grids were set up as a square with all traps spaced 10 m apart from neighboring traps in either direction and as 10 m apart as paired trap stations in transects. Grids were set up in a 5 trap 5 trap arrangement, resulting in a total of 25 traps per grid. A paired-trap transect, in addition to a grid on each site" with "40 traps total = 2 traps at each of the 20 stations" was used
trap and night counts do not square with the trap night total; I assume that the trap count figure is a maximum and that the trap night total is equally split between the two sites
Sample: 1861
Contributor: John Alroy
Enterer: John Alroy
Created: 2015-12-27 10:58:45
Modified: 2015-12-27 11:03:56
Abundance distribution
9 species
1 singleton
total count 493
Fisher's α: 1.563
geometric series k: 0.5190
Hurlbert's PIE: 0.7404
Shannon's H: 1.5862
Good's u: 0.9980