Pawnee National Grassland (off-colony)
Basic information
Sample name: Pawnee National Grassland (off-colony)

Reference: J. J. Kenney, J. K. Detling, and R. P. Reading. 2016. Influence of black-tailed prairie dogs (Cynomys ludovicianus) on short- horned grasshoppers (Orthoptera: Acrididae) on the shortgrass steppe of Colorado. Journal of Arid Environments 127:93-99 [ER 2157]
Geography
Country: United States

State: Colorado


Coordinate: 40° 45' N, 104° 41' W
Coordinate basis: stated in text

Geography comments: "at five sites in the western half of the Pawnee National Grassland"

Environment
Habitat: temperate savanna

Protection: other protected area

Substrate: ground surface

Disturbance: grazing

MAP: 322.0

Habitat comments: "shortgrass steppe... with no known history of prairie dog occupation... All sites were open to grazing by cattle"

Methods
Life forms: orthopterans

Sites: 5

Sampling methods: no design,hoop nets

Sample size: 415 individuals

Years: 1997, 1998

Days: 8

Seasons: summer,autumn

Sampling comments: "Within each... site, we sampled within one 45 m 75 m plot... In 1997, we conducted abundance sampling 15-16 July, 4-5 August, 18-19 August and 13-14 September... In 1998, we collected samples at 4 week intervals from 16 June through 15 September... Within each plot, we sampled grasshopper abundance by counting the number of grasshoppers flushed from twenty 0.8 m2 hoops placed within a 4 x 5 hoop grid with 15 m between hoop centers"
counts do include nymphs

Metadata
Sample number: 2156

Contributor: John Alroy

Enterer: John Alroy

Created: 2016-07-28 12:32:50

Modified: 2018-06-30 11:02:58

Abundance distribution
18 species
1 singleton
total count 415
geometric series index: 22.7
Fisher's α: 3.835
geometric series k: 0.7641
Hurlbert's PIE: 0.8681
Shannon's H: 2.3006
Good's u: 0.9976
Each square represents a species. Square sizes are proportional to counts.
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