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.Full text not available from this repository. (Request a copy)
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.
|Programmes:||CEH Topics & Objectives 2009 onwards > Biodiversity|
|CEH Sections:||CEH fellows|
|Date made live:||02 Nov 2011 10:08|
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