Coalhurst
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]
Geography
Country: Canada
State: Alberta
Coordinate: 49° 45' N, 112° 56' W
Coordinate basis: based on nearby landmark
Geography comments: "8 km west of Lethbridge" (coordinate based on Coalhurst)
Environment
Habitat: temperate savanna
Substrate: ground surface
Habitat comments: "Stipa-Agropyron prairie"
Methods
Life forms: orthopterans
Sampling methods: no design,sweep nets
Sample size: 2731 individuals
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
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
Metadata
Sample number: 2172
Contributor: John Alroy
Enterer: John Alroy
Created: 2016-08-04 09:53:53
Modified: 2016-08-03 23:56:26
Abundance distribution
27 species
3 singletons
total count 2731
geometric series index: 34.3
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
Each square represents a species. Square sizes are proportional to counts.
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