Query: classification: "42.75"
|Title||Change index: a measure of change in range size that is independent of changes in survey effort|
|Publisher||European Invertebrate Survey - the Netherlands|
|Book/source title||Changes in ranges: invertebrates on the move. Proceedings of the 13th International Colloquium of the European Invertebrate Survey, Leiden, 2-5 September 2001|
|Editors||M. Reemer, P.J. Helsdingen, R.M.J.C. Kleukers|
|Keywords||Change index; Decline; Distribution atlas; Recorder effort|
|Abstract||Change index: a measure of change in range size that is independent of changes in survey effort |
A major problem in studying the range changes of invertebrates using atlas data, is discriminating the effects of changing survey effort from the real biological changes. Using the data sets collated by the UK Biological Records Centre, a method has been developed which allows for the effects of variation in survey effort, by calculating an index of relative change in range size. The method is applicable to a wide range of atlas data sets.
|Download paper|| http://www.repository.naturalis.nl/document/46400 |