East Twin Pond (exuviae)
Basic information
Sample name: East Twin Pond (exuviae)
Reference: E. J. Kormondy and J. L. Gower. 1965. Life history variations in an association of Odonata. Ecology 46(6):882-886 [ER 1077]
Geography
Country: United States
State: Pennsylvania
County: Crawford
Coordinate: 41° 39' N, 80° 25' W
Coordinate basis: based on nearby landmark
Geography comments: "five miles south of Linesville" (basis of coordinate)
Environment
Habitat: lake
Protection: unprotected
Substrate: open water
Habitat comments: the pond "arose about 50 years ago from the bisecting of a 0.7-acre impoundment by a roadway" and has "a maximum depth of 1.0 m and a surface area of 0.3 acres"
Methods
Life forms: odonates
Sampling methods: no design,sieves
Sample size: 1200 individuals
Years: 1961, 1962
Sampling comments: "Emerging individuals were sampled using screen wire cages, 12 of which were constructed by attaching 26-mesh plastic screening to a wooden frame enclosing a basal area of 1 ft2 with a height of 1.5 ft. These cages were distributed over representative habitats of the open water of the pond... Eight cages of similar construction except that they enclosed a basal area of 2 ft2 were placed at random around the edge of the pond"
Metadata
Sample number: 1590
Contributor: John Alroy
Enterer: John Alroy
Created: 2015-05-23 19:27:39
Modified: 2020-01-14 09:45:27
Abundance distribution
12 species
4 singletons
total count 1200
geometric series index: 20.0
Fisher's α: 1.853
geometric series k: 0.5643
Hurlbert's PIE: 0.6851
Shannon's H: 1.3599
Good's u: 0.9967
Each square represents a species. Square sizes are proportional to counts.
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