Biological Invasions

, Volume 11, Issue 3, pp 663–671

Removal of invasive shrubs reduces exotic earthworm populations

Original Paper

DOI: 10.1007/s10530-008-9281-7

Cite this article as:
Madritch, M.D. & Lindroth, R.L. Biol Invasions (2009) 11: 663. doi:10.1007/s10530-008-9281-7

Abstract

Invasive species are a leading threat to native ecosystems, and research regarding their effective control is at the forefront of applied ecology. Exotic facilitation has been credited with advancing the success of several aggressive invasive species. Here, we suggest using the knowledge of exotic facilitations to control invasive earthworm populations. In northern hardwood forests, the invasive shrubs Rhamnus cathartica (buckthorn) and Lonicera x bella (honeysuckle) produce high quality leaf litter, and their abundance is positively correlated with exotic earthworms, which increase nutrient cycling rates. We performed an invasive plant removal experiment in two northern hardwood forest stands, one dominated by buckthorn and the other by honeysuckle. Removal of invasive shrubs reduced exotic earthworm populations by roughly 50% for the following 3 years. By targeting invasive species that are part of positive feedback loops, land managers can multiply the positive effects of invasive species removal.

Keywords

European earthwormsInvasive speciesInvasion meltdown

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Department of EntomologyUniversity of WisconsinMadisonUSA