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Changes in butterfly distributions: a simple correction for bias caused by sub-sampling of atlas records makes no difference to BAP status

Dennis, Roger L.H.. 2009 Changes in butterfly distributions: a simple correction for bias caused by sub-sampling of atlas records makes no difference to BAP status. Entomologist's Gazette, 60 (3). 141-149.

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Abstract/Summary

In order to compare two sets of butterfly atlas data for the U.K. contrasting in number of records, a process of sub-sampling has been applied by Butterfly Conservation UK. This procedure has been criticised on two counts by Barbour, first on the basis of being taken to an excessive level; secondly, for creating bias in trends (losses, gains) among species. The present paper provides a simple correction for the second issue resulting from potential bias created by sub-sampling of records to determine incidence within 10 km squares. It demonstrates that any bias has not influenced the Biodiversity Action Plan status of butterflies in the U.K.

Item Type: Publication - Article
Programmes: CEH Topics & Objectives 2009 onwards > Biodiversity
CEH Sections: CEH fellows
ISSN: 0013-8894
Related URLs:
Date made live: 02 Nov 2011 10:08
URI: http://nora.nerc.ac.uk/id/eprint/12812

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