Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Vegetation development on upland and marginal land treated with herbicide, for bracken (Pteridium aquilinum) control, in Great Britain.

Abstract

Aerial spraying with asulam is a favoured method of bracken control in Great Britain. A field survey of 117 sites, of which 15 were unsprayed, was carried out in upland areas of Britain in June-September 1994 and 1995. The survey sites constituted a chronosequence of different times after spraying. Floristic transects were made, and 11 environmental variables recorded. Spraying reduced bracken and increased α-diversity, but there were strong regional variations in vegetation development after treatment. There was also a strong influence of soil chemistry, and grazing could be critical in determining the fate of heathland after spraying.