An aerial netting study of insects migrating at high altitude over England

被引:94
作者
Chapman, JW [1 ]
Reynolds, DR
Smith, AD
Smith, ET
Woiwod, IP
机构
[1] Rothamsted Res, Plant & Invertebrate Ecol Div, Rothamsted Radar Entomol Unit, Harpenden AL5 2JQ, Herts, England
[2] Univ Greenwich, Inst Nat Resources, Plant Anim & Human Hlth Grp, Chatham ME4 4TB, Kent, England
基金
英国生物技术与生命科学研究理事会;
关键词
D O I
10.1079/BER2004287
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Day and night sampling of windborne arthropods at a height of 200 m above ground was undertaken at Cardington, Bedfordshire, UK, during July 1999, 2000 and 2002, using a net supported by a tethered balloon. The results from this study are compared with those from the classic aerial sampling programmes carried out by Hardy, Freeman and colleagues over the UK and North Sea in the 1930s. In the present study, aerial netting was undertaken at night as well as daytime, and so the diel periodicity of migration could be investigated, and comparisons made with the results from Lewis and Taylor's extensive survey of flight periodicity near ground level. In some taxa with day-time emigration, quite large populations could continue in high-altitude flight after dark, perhaps to a previously underrated extent, and this would greatly increase their potential migratory range. Any trend towards increases in night temperatures, associated with global warming, would facilitate movements of this type in the UK. Observations on the windborne migration of a variety of species, particularly those of economic significance or of radar-detectable size, are briefly discussed.
引用
收藏
页码:123 / 136
页数:14
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