Smallest Irish mammal 'may vanish'

 Ireland’s smallest mammal, the protected pygmy shrew, has “completely vanished” in some areas due to the introduction of new species.
The serious threat and possible extinction which foreign species the black vole and the greater white toothed shrew cause to the native wood mouse and pygmy shrew, were the subject of a two year study by researchers at Queen’s University Belfast. http://www.irishtimes.com/newspaper/breaking/2012/0220/breaking53.html

The original research  article can be found by searching the Libraries Ejournals or the SpringerLink Collection for: Montgomery, W., Lundy, M., & Reid, N. ‘Invasional meltdown’: evidence for unexpected consequences and cumulative impacts of multispecies invasions. Biological Invasions, 1-15.