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Community Ecology

, Volume 6, Issue 1, pp 83–91 | Cite as

The quantification of habitat architecture for explanations of arthropod assemblage patterns: a comparison of two methods

  • C. MoffattEmail author
  • S. McNeill
  • A. J. Morton
Article
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Abstract

A drop disc, originally conceived as a quick and easy method of measuring vegetation height, was compared to the more labour-intensive point quadrat pins in terms of usefulness in quantifying the vertical architecture of field-layer vegetation at a number of broadleaved woodland sites in Buckinghamshire, UK. The drop disc produced measures of height which correlated strongly with those of the point quadrat, as well as a potentially useful value corresponding to ‘volume of vegetation’, and it is suggested that this technique was relatively more efficient at producing useful data. A number of measures of architectural complexity showed considerable variation in how they ranked sites based upon both real and contrived data. One of these, Fisher’s (or Williams’) alpha, is shown to be unsuitable for this application. Based upon the weak and non-significant correlations of derived statistics, the practical difficulties in measuring architecture and unfounded assumptions that regard all arthropod species en masse, it is reasoned that explanations of community patterns with respect to architecture must be treated with caution.

Keyword

Architectural complexity Drop disc Fisher’s alpha Habitat structure Insect community Point quadrat Williams’ alpha 

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© Akadémiai Kiadó, Budapest 2005

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Department of Environmental ManagementUniversity of Central LancashirePrestonUK
  2. 2.Department of Biological SciencesImperial College London, Silwood Park CampusAscotUK

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