Basic information
Sample name: Coalhurst

Reference: J. M. Hardman and S. Smoliak. 1982. The relative impact of various grasshopper species on Stipa-Agropyron mixed prairie and fescue prairie in southern Alberta. Journal of Range Management 35(2):171-176 [ER 2165]
Country: Canada
State: Alberta

Coordinate: 49° 45' N, 112° 56' W
Basis of coordinate: based on nearby landmark
Geography comments: "8 km west of Lethbridge" (coordinate based on Coalhurst)
Climate and habitat
Habitat: temperate savanna
Substrate: ground surface
Habitat comments: "Stipa-Agropyron prairie"
Life forms: orthopterans
Sampling methods: no design, sweep nets
Sample size: 2731
Years: 1971 - 1976, 1978, 1979
Seasons: summer
Sampling comments: "Grasshoppers were sampled annually in late August... The samples were obtained by making 50-1, 000 semi-circular sweeps with a 34-cm diam. net at the rate of one sweep per step"
text states there are 2796 individuals but this does not square with the mean counts in Table 1, which clearly imply there were 800 sweeps and therefore about 2731 captures; this is consistent with there having been 50 sweeps during each of the eight field seasons, so 800 sweeps are assumed
Sample: 2172
Contributor: John Alroy
Enterer: John Alroy
Created: 2016-08-04 09:53:53
Modified: 2016-08-04 09:56:26
Abundance distribution
27 species
3 singletons
total count 2731
standardised richness: not computable
Fisher's α: 4.161
geometric series k: 0.7884
Hurlbert's PIE: 0.8849
Shannon's H: 2.4097
Good's u: 0.9989