In article , Malcolm
writes

"In Scotland, A. triangulatus occurs predominantly in botanical and
domestic gardens, and currently is not generally considered to be a
problem on agricultural land. In Northern Ireland it is found in
domestic gardens but also appears to have colonized grass leys in many
localities.

However, its impact on earthworm populations remains ambiguous, with
evidence of numbers in areas with large NZF populations being reduced
temporarily before recovering to levels recorded prior to invasion.
Other studies have suggested a differential susceptibility of earthworm
species to A. triangulatus predation, with recovering populations
exhibiting an altered species profile. Results of a large-scale survey
of earthworms and A. triangulatus populations in grass fields in
Northern Ireland has shown a marked increase in occurrence of NZF's,
particularly in field margins."


Have a look at the website:

http://www.csl.gov.uk/resdev/environ...ject/index.htm

Thanks :-)
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm