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Biodiversity as a barrier to ecological invasion

Nature volume 417, pages 636–638 (2002)Cite this article

Abstract

Biological invasions are a pervasive and costly environmental problem1,2 that has been the focus of intense management and research activities over the past half century. Yet accurate predictions of community susceptibility to invasion remain elusive. The diversity resistance hypothesis, which argues that diverse communities are highly competitive and readily resist invasion3,4,5, is supported by both theory6 and experimental studies7,8,9,10,11,12,13,14 conducted at small spatial scales. However, there is also convincing evidence that the relationship between the diversity of native and invading species is positive when measured at regional scales3,11,15,16. Although this latter relationship may arise from extrinsic factors, such as resource heterogeneity, that covary with diversity of native and invading species at large scales, the mechanisms conferring greater invasion resistance to diverse communities at local scales remain unknown. Using neighbourhood analyses, a technique from plant competition studies17,18,19, we show here that species diversity in small experimental grassland plots enhances invasion resistance by increasing crowding and species richness in localized plant neighbourhoods. Both the establishment (number of invaders) and success (proportion of invaders that are large) of invading plants are reduced. These results suggest that local biodiversity represents an important line of defence against the spread of invaders.

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Figure 1: Plot diversity and invader performance.
Figure 2: Neighbourhood characteristics and plot diversity treatment.
Figure 3: The influence of the number of neighbouring plants on invader performance.

References

  1. Mooney, H. A. & Drake, J. A. Ecology of Biological Invasions of North America and Hawaii (Springer, New York, 1986)

    Book  Google Scholar 

  2. Vitousek, P. M., D'Antonio, C. M., Loope, L. L. & Westbrooks, R. Biological invasions as global environmental change. Am. Sci. 84, 468–478 (1996)

    ADS  Google Scholar 

  3. Levine, J. & D'Antonio, C. M. Elton revisited: a review of evidence linking diversity and invasibility. Oikos 87, 15–26 (1999)

    Article  Google Scholar 

  4. Crawley, M. J. in Colonization, Succession and Stability (eds Crawley, M. J., Edwards, P. J. & Gray, A. J.) Blackwell, Oxford, (1987), 429–453

    Google Scholar 

  5. Elton, C. S. The Ecology of Invasions by Animals and Plants (Methuen, London, 1958)

    Book  Google Scholar 

  6. Case, T. J. Invasion resistance arises in strongly interacting species-rich model competition communities. Proc. Natl Acad. Sci. USA 87, 9610–9614 (1990)

    Article  ADS  CAS  Google Scholar 

  7. Tilman, D. The ecological consequences of changes in biodiversity: A search for general principles. Ecology 80, 1455–1474 (1999)

    Google Scholar 

  8. McGrady-Steed, J., Harris, P. & Morin, P. Biodiversity regulates ecosystem reliability. Nature 390, 162–165 (1997)

    Article  ADS  CAS  Google Scholar 

  9. Tilman, D. Community invasibility, recruitment limitation, and grassland biodiversity. Ecology 78, 81–92 (1997)

    Article  Google Scholar 

  10. Knops, J. M. H. et al. Effects of plant species richness on invasion dynamics, disease outbreaks, insect abundances and diversity. Ecol. Lett. 2, 286–293 (1999)

    Article  Google Scholar 

  11. Levine, J. Plant diversity and biological invasions: Relating local process to community pattern. Science 288, 852–854 (2000)

    Article  ADS  CAS  Google Scholar 

  12. Naeem, S. et al. Plant diversity increases resistance to invasion in the absence of covarying extrinsic factors. Oikos 91, 97–108 (2000)

    Article  Google Scholar 

  13. Symstad, A. J. A test of the effects of functional group richness and composition on grassland invasibility. Ecology 81, 99–109 (2000)

    Article  Google Scholar 

  14. Dukes, J. S. Biodiversity and invasibility in grassland microcosms. Oecologia 126, 563–568 (2001)

    Article  ADS  Google Scholar 

  15. Planty-Tabacchi, A. M., Tabacchi, E., Naiman, R. J., Deferrari, C. & Decamps, H. Invasibility of species-rich communities in riparian zones. Conserv. Biol. 10, 598–607 (1996)

    Article  Google Scholar 

  16. Stohlgren, T. J. et al. Exotic plant species invade hot spots of native plant diversity. Ecol. Monogr. 69, 25–46 (1999)

    Article  Google Scholar 

  17. Mack, R. N. & Harper, J. L. Interference in dune annuals: spatial pattern and neighbourhood effects. J. Ecol. 65, 345–364 (1977)

    Article  Google Scholar 

  18. Pacala, S. W. & Silander, J. A. Jr Neighbourhood interference among velvet leaf, Abutilon theophrasti, and pigweed, Amaranthus retroflexus. Oikos 48, 217–224 (1987)

    Article  Google Scholar 

  19. Rejmanek, M. & Messina, J. J. Multiresource Management of Ponderosa Pine Forests General Technical Report RM-185 (eds Tecle, A., Covington, W. W. & Haure, R. H.) 97–102 (United States Department of Agriculture, Ft. Collins, 1989)

    Google Scholar 

  20. Tilman, D., Wedin, D. & Knops, J. M. H. Productivity and sustainability influenced by biodiversity in grassland ecosystems. Nature 379, 718–720 (1996)

    Article  ADS  CAS  Google Scholar 

  21. Wardle, D. A. Experimental demonstration that plant diversity reduces invisibility—evidence of a biological mechanism or a consequence of sampling effect? Oikos 95, 161–170 (2001)

    Article  Google Scholar 

  22. Stachowicz, J. J., Whitlatch, R. B. & Osman, R. W. Species diversity and invasion resistance in a marine ecosystem. Science 286, 1577–1579 (1999)

    Article  CAS  Google Scholar 

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Acknowledgements

We thank J. Craine for suggestions with analyses, S. Hobbie, J. Fargione and J. Craine for comments on the manuscript, and T. Mielke and the undergraduate interns at Cedar Creek who made this work possible. This work was supported by the Andrew Mellon Foundation, the McKnight Foundation, the University of Minnesota, NASA and the NSF.

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Authors and Affiliations

  1. Department of Ecology, Evolution, and Behavior, University of Minnesota, 1987 Upper Buford Circle, Saint Paul, 55108, Minnesota, USA

    Theodore A. Kennedy & David Tilman

  2. Department of Zoology, University of Washington, Box 351800, 24 Kincaid Hall, Seattle, 98195-1800, Washington, USA

    Shahid Naeem & Katherine M. Howe

  3. School of Biological Sciences, University of Nebraska, 348 Manter Hall, Lincoln, 68588-0118, Nebraska, USA

    Johannes M. H. Knops

  4. Department of Forest Resources, University of Minnesota, 1530 Cleveland Avenue North, Saint Paul, 55108, Minnesota, USA

    Peter Reich

Authors
  1. Theodore A. Kennedy
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  4. Johannes M. H. Knops
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Correspondence to Theodore A. Kennedy.

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Kennedy, T., Naeem, S., Howe, K. et al. Biodiversity as a barrier to ecological invasion. Nature 417, 636–638 (2002). https://doi.org/10.1038/nature00776

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