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28 - Hemiptera

Published online by Cambridge University Press:  05 August 2012

By
Alan J.A. Stewart  and
Peter Kirby
Edited by
Norman Maclean
Norman Maclean
Affiliation:
University of Southampton
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Summary

Summary

The Hemiptera are a diverse order of sucking bugs, but reliable data on the geographical distributions of species in Britain, and changes therein over the last 50 years, exist only for the Heteroptera (so-called ‘true bugs’) and the Auchenorrhyncha (leafhoppers and related groups). Greatly increased recording activity and more efficient sampling techniques have improved our knowledge of many species in these two groups, making it important to distinguish species that have genuinely expanded their ranges from those that are now simply better recorded. Nevertheless, there is little doubt that considerable changes have taken place in the distribution of individual species in the last half century and that these changes are accelerating. The rapid spread of a number of species with previously restricted ranges, sometimes by switching to a novel host plant or adopting a new habitat or a wider habitat range, may be a signal of climate change. Fifty-one species have been added to the British list since 1990, their arrival, usually from the immediate continent, facilitated by a number of factors, including climatic warming and the importation of ornamental plant stock. In some cases, new waves of immigrants have enabled previously scarce or locally extinct species to spread rapidly. Measured against these positive changes, approximately one-quarter of the species in both the Heteroptera and the Auchenorrhyncha are of conservation concern by virtue of being classified as nationally notable or rarer. […]

Type
Chapter
Information
Silent Summer
The State of Wildlife in Britain and Ireland
 , pp. 512 - 530
Publisher: Cambridge University Press
Print publication year: 2010

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References

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