Plant and Soil

, Volume 345, Issue 1, pp 257–269

The roles of biotic resistance and nitrogen deposition in regulating non-native understory plant diversity

Regular Article

DOI: 10.1007/s11104-011-0778-y

Cite this article as:
Jones, R.O. & Chapman, S.K. Plant Soil (2011) 345: 257. doi:10.1007/s11104-011-0778-y


Understanding the mechanisms that allow for plant invasions is important for both ecologists and land managers, due to both the environmental and economic impacts of native biodiversity losses. We conducted an observational field study in 2008 to examine the relationship between native and non-native forest understory plant species and to investigate the influence of soil nitrogen (N) on plant community richness and diversity. In 2009, we conducted a companion fertilization experiment to investigate how various forms of N deposition (inorganic and organic) influenced native and non-native species richness and diversity. We found that native species richness and diversity were negatively correlated with 1) non-native species richness and diversity and 2) higher total soil inorganic N. In the deposition experiment, adding organic N fertilizers decreased native richness and diversity compared to inorganic N fertilizers. Together, these results indicate that increasing soil N can be detrimental to native species; however, native species richness and diversity may counteract the N-stimulation of non-native species. Furthermore, the negative effects of organic N deposition on native plants may be just as strong, if not stronger, than the effects of inorganic N deposition.


InvasionSoil nitrogenNon-nativeRichnessNativeDiversity

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Department of Natural Resources and Environmental Science, Ecology, Evolution, and Conservation Biology Graduate GroupUniversity of Nevada, RenoRenoUSA
  2. 2.Department of BiologyVillanova UniversityVillanovaUSA