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The Diversity of the Insect Fauna in a Hedgerow and Neighbouring Fields

T. Lewis
Journal of Applied Ecology
Vol. 6, No. 3 (Dec., 1969), pp. 453-458
DOI: 10.2307/2401511
Stable URL: http://www.jstor.org/stable/2401511
Page Count: 6
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The Diversity of the Insect Fauna in a Hedgerow and Neighbouring Fields
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Abstract

The insect communities on vegetation in a mixed hedgerow and in neighbouring fields of pasture and field beans were sampled with a vacuum sampler, and the aerial populations above the vegetation with suction traps. For terrestrial and aerial samples, the frequency distribution of the number of individuals in each of seventy-six taxa identified fitted a logarithmic series, so α was used as an index to compare the relative diversity of communities in and above these habitats. Of the terrestrial communities, that on the hedge was the more diverse, less so in the beans, and least in the pasture. The diversity of the aerial population decreased with increasing distance from the hedge, and the resulting pattern of diversity resembled the pattern of shelter produced by the hedge. The presence of the hedge enriched the aerial population nearby for a distance of three to ten times its height to leeward and one to two times to windward.

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