North of Madison
Basic information
Sample name: North of Madison

Reference: G. C. Clough. 1963. Biology of the arctic shrew, Sorex arcticus. American Midland Naturalist 69(1):69-81 [ER 1589]
Country: United States
State: Wisconsin

Coordinate: 43° 4' N, 89° 24' W
Basis of coordinate: based on nearby landmark
Geography comments: "one mile north of Madison" (basis of coordinate)
Climate and habitat
Habitat: temperate wetland
Substrate: ground surface
MAT: 7.3
MAP: 784.0
Habitat comments: "a marsh... primarily grass-sedge... Each spring much of the surface, except for the emergent tussocks, was covered with water up to six inches deep"
climate data are from Kucharik et al. (2003, Journal of Soil and Water Conservation) and are apparently for Dane County: mean annual daily min/max 1.5 and 13.1 C
Life forms: rodents, other small mammals
Sampling methods: snap traps, other traps
Sample size: 261
Years: 1959 - 1961
Net or trap nights: 6500
Sampling comments: "Longworth live traps were used in two areas... One hundred trapping stations were marked by states placed in 10 rows of 10 stations each. Stations were 50 feet apart. Generally 40 to 50 live traps, one at a station, were set during one trapping period. Snap traps were used once for a period of five days on a square grid of the same dimensions as the live-trap grids. The major portion of the material was collected on two trap lines... Each line consisted of two parallel rows 400 feet apart, of 20 stations each. Three Victor snap traps, baited with a peanut butter-rolled oats mixture were set at each station in a triangle" and "operated alternately at intervals of six to eight weeks for three days at each period... The two census lines were operated from April, 1959, through July, 1961, with a total of 16 trapping periods" (total trapping effort 45 x 3 x 16 + 100 x 5 + 2 x 2 x 20 x 3 x 16 = 6500 trap nights)
Sample: 1818
Contributor: John Alroy
Enterer: John Alroy
Created: 2015-12-11 13:28:10
Modified: 2015-12-11 13:28:10
Abundance distribution
7 species
1 singleton
total count 261
standardised richness: not computable
Fisher's α: 1.323
geometric series k: 0.4240
Hurlbert's PIE: 0.5202
Shannon's H: 1.0540
Good's u: 0.9962