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Chinese Privet (Ligustrum sinense) Removal and its Effect on Native Plant Communities of Riparian Forests

  • James L. Hanula (a1), Scott Horn (a1) and John W. Taylor (a2)


Chinese privet is a major invasive shrub within riparian zones throughout the southeastern United States. We removed privet shrubs from four riparian forests in October 2005 with a Gyrotrac® mulching machine or by hand-felling with chainsaws and machetes to determine how well these treatments controlled privet and how they affected plant community recovery. One year after shrub removal a foliar application of 2% glyphosate was applied to privet remaining in the herbaceous layer. Three “desired-future-condition” plots were also measured to assess how well treatments shifted plant communities toward a desirable outcome. Both methods completely removed privet from the shrub layer without reducing nonprivet shrub cover and diversity below levels on the untreated control plots. Nonprivet plant cover on the mulched plots was > 60% by 2007, similar to the desired-future-condition plots and higher than the hand-felling plots. Both treatments resulted in higher nonprivet plant cover than the untreated controls. Ordination showed that after 2 yr privet removal plots were tightly grouped, suggesting that the two removal techniques resulted in the same plant communities, which were distinctly different from both the untreated controls and the desired-future-condition. Both treatments created open streamside forests usable for recreation and other human activities. However, much longer periods of time or active management of the understory plant communities, or both, will be required to change the forests to typical mature forest plant communities.


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Ashton, I. W., Hyatt, L. A., Howe, K. M., Gurevitch, J., and Lerdau, M. T. 2005. Invasive species accelerate decomposition and litter nitrogen loss in a mixed deciduous forest. Ecol. Appl 15:12631272.
Chao, A. 1984. Nonparametric estimation of the number of classes in a population. Scand. J. Stat 11:265270.
Collier, M. H., Vankat, J. L., and Hughes, M. R. 2002. Diminished plant richness and abundance below Lonicera maackii, an invasive shrub. Am. Midl. Nat 147:6071.
Colwell, C. M. 1998. Historical change in vegetation and disturbance on the Georgia Piedmont. Am. Midl. Nat 140:7889.
Day, R. W. and Quinn, G. P. 1989. Comparison of treatments after an analysis of variance in ecology. Ecol. Monogr 59:433463.
Ehrenfeld, J. G., Kourtev, P., and Huang, W. 2001. Changes in soil functions following invasions of exotic understory plants in deciduous forests. Ecol. Appl 11:12871300.
Elliott, C. A. 1990. Diversity indices. Pages 297302. In Hunter, M. L. Jr Wildlife, Forests and Forestry: Principles of Managing for Biological Diversity. Engelwood, NJ Regents/Prentice Hall.
Fagan, M. E. and Peart, D. R. 2004. Impact of the invasive shrub glossy buckthorn (Rhamnus frangula L.) on juvenile recruitment by canopy trees. For. Ecol. Manage 194:95107.
Godinez-Alvarez, H., Herrick, J. E., Mattocks, M., Toledo, D., and Van Zee, J. 2009. Comparison of three vegetation monitoring methods: their relative utility for ecological assessment and monitoring. Ecol. Indicators 9:10011008.
Gorchov, D. L. and Trisel, D. E. 2003. Competitive effects of the invasive shrub, Lonicera maackii (Rupr.) Herder (Caprifoliaceae), on the growth and survival of native tree seedlings. Plant Ecol 166:1324.
Gordon, D. R. 1998. Effects of invasive, non-indigenous plant species on ecosystem processes: lessons from Florida. Ecol. Appl 8:975989.
Hammer, Ø, Harper, D. A. T., and Ryan, P. D. 2001. PAST: Paleontological Statistics Software Package for education and data analysis., January 29, 2009.
Harrington, T. B. and Miller, J. H. 2005. Effects of application rate, timing, and formulation of glyphosate and triclopyr on control of Chinese privet (Ligustrum sinense). Weed Technol 19:4754.
Hartman, K. M. and McCarthy, B. C. 2004. Restoration of a forest understory after the removal of an invasive shrub, Amur honeysuckle (Lonicera maackii). Restor. Ecol 12:154165.
Heneghan, L., Rauschberg, C., Fatemi, F., and Workman, M. 2004. European buckthorn (Rhamnus cathartica) and its effects on some ecosystem properties in an urban woodland. Ecol. Restor 22:275280.
Hood, W. G. and Naiman, R. J. 2000. Vulnerability of riparian zones to invasion by exotic woody plants. Plant Ecol 148:105114.
Hulme, P. E. and Bremner, E. T. 2006. Assessing the impact of Impatiens glandulifera on riparian habitats: partitioning diversity components following species removal. J. Appl. Ecol 43:4350.
Jacquemyn, H. and Brys, R. 2008. Effects of stand age on the demography of a temperate forest herb in post-agricultural forests. Ecology 89:34803489.
Kasmer, J. and Shefferson, R. 2002. Effects of removing an invasive understory shrub on growth of canopy trees in northeastern Illinois. Ecol. Restor 20:209210.
Kittell, M. M. 2001. Relationship among invasive Chinese privet, plant diversity, and small mammal captures in southeastern deciduous forests. M.S. thesis. Clemson, SC Clemson University. 35 p.
Klepac, J., Rummer, R. B., Hanula, J. L., and Horn, S. 2007. Mechanical removal of Chinese privet. Asheville, NC U.S. Department of Agriculture Forest Service Southern Research Station Res. Paper SRS-43. 5 p.
Levine, J. M. and D'Antonio, C. M. 1999. Elton revisited: a review of evidence linking diversity and invasibility. Oikos 87:1526.
Love, J. P. and Anderson, J. T. 2009. Seasonal effects of four control methods on the invasive Morrow's honeysuckle (Lonicera morrowii) and initial responses of understory plants in a southwestern Pennsylvania old field. Restor. Ecol 17:549559.
Luken, J. O. 1997. Management of plant invasions: implicating ecological succession. Pages 133144. In Luken, J. O. and Thieret, J. W. Assessment and Management of Plant Invasion. New York Springer-Verlag.
Mann, C. C. 2005. 1491: New Revelations of the Americas before Columbus. New York Vintage Books. 480 p.
McCune, B. and Mefford, M. J. 1999. PC-ORD. Multivariate analysis of ecological data, version 4. Gleneden Beach, OR MjM Software Design. 237 p.
Merriam, R. W. and Feil, E. 2003. The potential impact of an introduced shrub on native plant diversity and forest regeneration. Biol. Invasion 4:369373.
Miller, K. E. and Gorchov, D. L. 2004. The invasive shrub, Lonicera maackii, reduces growth and fecundity of perennial forest herbs. Oecologia 139:359375.
Oswalt, C. M. and Oswalt, S. N. 2007. Winter litter disturbance facilities the spread of the nonnative grass Microstegium vimineum (Trin.) A. Camus. For. Ecol. Manag 249:199203.
Pattison, R. R., Goldstein, G., and Ares, A. 1998. Growth, biomass allocation and photosynthesis of invasive and native Hawaiian rainforest species. Oecologia 117:449459.
Pimentel, D., Lach, L., Zuniga, R., and Morrison, D. 2000. Environmental and economic costs of nonindigenous species in the United States. BioScience 50:5365.
Planty-Tabacchi, A-M., Tabacci, E., Naiman, J., Deferrari, C., and Décamps, H. 1996. Invasibility of species-rich communities in riparian zones. Cons. Biol 10:598607.
Pyšek, P. and Prach, P. 1993. Plant invasions and the role of riparian habitats: a comparison of four species alien to central Europe. J. Biogeogr 20:412420.
Rinella, M. J., Maxwell, B. D., Fay, P. K., Weaver, T., and Shelley, R. L. 2009. Control effort exacerbates invasive-species problem. Ecol. Appl 19:155162.
SAS Institute 1982. SAS User's Guide: Statistics. Cary, NC SAS Institute. 584 p.
Ward, R. W. 2002. Extent and dispersal rates of Chinese privet (Ligustrum sinense) invasion on the upper Oconee River floodplain, North Georgia. Southeast. Geogr 1:2948.
Wilcox, J. and Beck, C. W. 2007. Effects of Ligustrum sinense Lour. (Chinese privet) on abundance and diversity of songbirds and native plants in a southeastern nature preserve. Southeast. Nat 6:535550.
Woods, K. D. 1993. Effects of invasion by Lonicera tatarica L., on herbs and tree seedlings in four New England forests. Am. Midl. Nat 130:6274.
Woods, K. D. 1997. Community response to plant invasion. Pages 5668. In Luken, J. O. and Thieret, J. W. Assessment and Management of Plant Invasion. New York Springer-Verlag.


Chinese Privet (Ligustrum sinense) Removal and its Effect on Native Plant Communities of Riparian Forests

  • James L. Hanula (a1), Scott Horn (a1) and John W. Taylor (a2)


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