East Twin Pond (larvae)
Basic information
Sample name: East Twin Pond (larvae)

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

Coordinate: 41° 39' N, 80° 25' W
Basis of coordinate: based on nearby landmark
Geography comments: "five miles south of Linesville" (basis of coordinate)
Climate and habitat
Habitat: lake
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: 229
Years: 1961, 1962
Sampling comments: "the larval population was sampled eight times. A square frame was constructed of two lengths of steel 25 X 4 mm hinged near their ends to enclose a basal area of .25 M2. Fine-mesh nylon was attached to the frame forming a bag about 1 m long. In operation, the opened frame was dropped into the water from a boat"
Metadata
Sample: 1589
Contributor: John Alroy
Enterer: John Alroy
Created: 2015-05-23 19:24:54
Modified: 2016-10-21 15:41:22
Abundance distribution
14 species
2 singletons
total count 229
Fisher's α: 3.288
geometric series k: 0.7327
Hurlbert's PIE: 0.8162
Shannon's H: 1.9401
Good's u: 0.9913
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