Crop cover the principal influence on non-crop ground beetle (Coleoptera, Carabidae) activity and assemblages at the farm scale in a long-term assessment

Bulletin of Entomological Research
M D EyreC N R Critchley

Abstract

Ground beetle data were generated using pitfall traps in the 17-year period from 1993 to 2009 and used to investigate the effects of changes in surrounding crop cover on beetle activity and assemblages, together with the effects of weather variability. Beetles were recorded from non-crop field margins (overgrown hedges). Crop cover changes explained far more variation in the beetle assemblages recorded than did temperature and rainfall variation. A reduction in management intensity and disturbance in the crops surrounding the traps, especially the introduction and development of willow coppice, was concomitant with changes in individual species activity and assemblage composition of beetles trapped in non-crop habitat. There were no consistent patterns in either overall beetle activity or in the number of species recorded over the 17-year period, but there was a clear change from assemblages dominated by smaller species with higher dispersal capability to ones with larger beetles with less dispersal potential and a preference for less disturbed agroecosystems. The influence of surrounding crops on ground beetle activity in non-crop habitat has implications for ecosystem service provision by ground beetles as pest predators. The...Continue Reading

References

Nov 1, 1996·The Journal of Prosthetic Dentistry·L Sykes
Dec 1, 2001·Annual Review of Entomology·W O C SymondsonM H Greenstone
Jun 1, 2002·Science·Paul MäderUrs Niggli
Jan 26, 2012·Biological Reviews of the Cambridge Philosophical Society·Teja TscharntkeCatrin Westphal
Jul 26, 2013·Trends in Ecology & Evolution·Don A DriscollAnnabel L Smith

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