The Rangeland Journal The Rangeland Journal Society
Rangeland ecology and management
RESEARCH ARTICLE

The impacts of invasive plant species on the biodiversity of Australian rangelands

A. C. Grice
+ Author Affiliations
- Author Affiliations

CSIRO Sustainable Ecosystems and Co-operative Research Centre for Australian Weed Management, Private Bag PO Aitkenvale, Qld 4814, Australia. Email: tony.grice@csiro.au

The Rangeland Journal 28(1) 27-35 https://doi.org/10.1071/RJ06014
Submitted: 10 January 2006  Accepted: 14 March 2006   Published: 29 May 2006

Abstract

Most parts of the Australian rangelands are at risk of invasion by one or more species of non-native plants. The severity of current problems varies greatly across the rangelands with more non-native plant species in more intensively settled regions, in climatic zones that have higher and more reliable rainfall, and in wetter and more fertile parts of rangeland landscapes. Although there is quantitative evidence of impacts on either particular taxonomic groups or specific ecological processes in Australian rangelands, a comprehensive picture of responses of rangeland ecosystems to plant invasions is not available. Research has been focused on invasive species that are perceived to have important effects. This is likely to down play the significance of species that have visually less dramatic influences and ignore the possibility that some species could invade and yet have negligible consequences. It is conceivable that most of the overall impact will come from a relatively small proportion of invasive species. Impacts have most commonly been assessed in terms of plant species richness or the abundance of certain groups of vertebrates to the almost complete exclusion of other faunal groups. All scientific studies of the impacts of invasive species in Australian rangelands have focused on the effects of individual invasive species although in many situations native communities are under threat from a complex of interacting weed species. Invasion by non-native species is generally associated with declines in native plant species richness, but faunal responses are more complex and individual invasions may be associated with increase, decrease and no-change scenarios for different faunal groups. Some invasive species may remain minor components of the vegetation that they invade while others completely dominate one stratum or the vegetation overall.

Additional keywords: plant invasion, plant species richness, weeds.


Acknowledgments

I acknowledge useful discussion on the impacts of weeds with participants in the workshop that provided the impetus for this paper: Nora Brandli, Yvonne Buckley, Shane Campbell, Steve Csurhes, Dane Panetta, Joe Vitell, Craig Walton, Richard Carter, Mike Cole, Mic Julien, Rieks van Klinken, Sandy Lloyd, Rachel McFadyen, John Morley, John Pitt, Anita Smyth and Helen Spafford-Jacob. Two anonymous referees also provided helpful comments.


References


Adair R. J. , and Groves R. H. (1998). ‘Impact of environmental weeds on biodivieristy: a review and development of methodology.’ (Environment Australia: Canberra.)

Amor R. L. , Richardson R. G. , Pritchard G. H. , and Bruzzese E. (1998). Rubus fruticosus L. agg. In: ‘The biology of Australian weeds’. Vol 2. (Eds F. D. Panetta, R. H. Groves and R. C. H. Shepherd.) pp. 225–246. (R.G. and F.J. Richardson: Frankston.)

Amor R. L., Stevens P. L. (1976) Spread of weeds from a roadside into sclerophyll forests at Dartmouth, Australia. Weed Research 16, 111–118. open url image1

Braithwaite R. W., Lonsdale W. M. (1987) The rarity of Sminthopsis virginiae in relation to natural and unnatural habitats. Conservation Biology 1, 341–343.
CrossRef | open url image1

Braithwaite R. W., Lonsdale W. M., Estsbergs J. A. (1989) Alien vegetation and native biota in tropical Australia: the spread and impact of Mimosa pigra. Biological Conservation 48, 189–210.
CrossRef | open url image1

Bray S. , Yee M. , Paton C. , Silcock R. , and Bahnisch L. (1999). The role of humans in the invasion of pastures by giant rats tail grass (Sporobolus pyramidalis). In: ‘People and rangelands: building the future. Proceedings of the VI International Rangeland Congress’. (Eds D. J. Eldridge and D. Freudenberger.) pp. 593–594. (VI International Rangeland Congress Inc.: Townsville.)

Bunn S. E., Davies P. M., Kellaway D. M., Prosser I. P. (1998) Influence of invasive macrophytes on channel morphology and hydrology in an open tropical lowland stream, and potential control by riparian shading. Freshwater Biology 39, 171–178.
CrossRef | open url image1

Butler D. W., Fairfax R. J. (2003) Buffel grass and fire in a gidgee and brigalow woodland: a case study from Central Queensland. Ecological Management and Restoration 4, 120–125.
CrossRef | open url image1

Campbell M. H. , and Vere D. T. (1998). Nassella trichotoma. In: ‘The biology of Australian weeds’. (Eds R. H. Groves, R. C. H. Shepherd, and R. G. Richardson.) pp. 189–202. (R.G. and F.J. Richardson: Frankston.)

Chippendale J. F., Panetta F. D. (1994) The cost of parthenium weed to the Queensland cattle industry. Plant Protection Quarterly 9, 73–76. open url image1

Costello D. A., Lunt I. D., Williams J. E. (2000) Effects of invasion by the indigenous shrub Acacia sophorae on plant composition of coastal grasslands in south-eastern Australia. Biological Conservation 96, 113–121.
CrossRef | open url image1

Cunningham G. M. , Mulham W. E. , Milthorpe P. L. , and Leigh J. H. (1981). ‘Plants of western New South Wales.’ (NSW Government Printing Office: Sydney.)

Department of Environment and Heritage (2003). Australia’s 15 national biodiversity hotspots. Available online at: www.deh.gov.au/biodiversity/hotspots/facts.html (accessed 10 March 2006).

Fensham R. J., Fairfax R. J., Cannell R. J. (1994) The invasion of Lantana camara L. in Forty Mile Scrub National Park, north Queensland. Australian Journal of Ecology 19, 297–305. open url image1

Foran B. D. , Friedel M. H. , MacLeod M. D. , Stafford Smith M. , and Wilson A. D. (1990). ‘A policy for the future management of Australia’s rangelands.’ (CSIRO: Melbourne.)

Fox M. D. (1991) Developing control strategies for environmental weeds. Plant Protection Quarterly 6, 109–110. open url image1

Franks A. J. (2002) The ecological consequences of buffel grass (Cenchrus ciliaris) establishment within remnant vegetation of Queensland. Pacific Conservation Biology 8, 99–107. open url image1

French K., Zubovic A. (1997) Effects of the weed Chrysanthemoides monilifera (bitou bush) on bird communities. Wildlife Research 24, 727–735.
CrossRef | open url image1

Gentle C. B., Duggin J. A. (1998) Interference of Choricarpia leptopetala by Lantana camara with nutrient enrichment in mesic forests on the Central Coast of NSW. Plant Ecology 136, 205–211.
CrossRef | open url image1

Gilfedder L., Kirkpatrick J. B. (1993) Germinable seed and competitive relationships between a rare native species and exotics in a semi-natural pasture in the Midlands, Tasmania. Biological Conservation 64, 113–119.
CrossRef | open url image1

Gleadow R. M., Ashton D. H. (1981) Invasion by Pittosporum undulatum of the forests of central Victoria. 1. invasion patterns and plant morphology. Australian Journal of Botany 29, 705–720.
CrossRef | open url image1

Goldberg D., Novoplansky A. (1997) On the relative importance of competition in unproductive environments. Journal of Ecology 85, 409–418. open url image1

Grice A. C. (2000). Weed management in Australian rangelands. In: ‘Australian weed management systems’. (Ed. B. M. Sindel.) pp. 429–458. (R.G. and F.J. Richardson: Frankston.)

Grice A. C. (2002) The biology of Australian weeds 39. Ziziphus mauritiana Lam. Plant Protection Quarterly 17, 2–11. open url image1

Grice A. C. (2004) Weeds and the monitoring of biodiversity in rangelands. Austral Ecology 29, 51–58.
CrossRef | open url image1

Grice A. C., Campbell S. D. (2000) Weeds in pasture ecosystems – symptom or disease? Tropical Grasslands 34, 264–270. open url image1

Grice A. C. , Field A. R. , and McFadyen R. E. C. (2004). Quantifying the effects of weeds on biodiversity: beyond Blind Freddy’s test. In: ‘Weed management: balancing people, planet and profit’. Proceedings of the 14th Australian Weeds Conference. (Eds B. M. Sindel and S. B. Johnson.) pp. 464–468. (Weed Society of New South Wales: Sydney.)

Griffin G. F. (1993). The spread of buffel grass in inland Australia: land use conflicts. In: ‘Proceedings of the 10th Australian Weeds Conference and the 14th Asian Pacific Weed Science Society Conference’. pp. 501–504. (Weed Society of Queensland: Brisbane.)

Griffin G. F., Stafford Smith D. M., Morton S. R., Allan G. E., Masters K. A., Preece N. (1989) Status and implications of the invasion of tamarisk (Tamarix aphylla) on the Finke River, Northern Territory, Australia. Journal of Environmental Management 29, 297–315. open url image1

Groves R. H. , Shepherd R. C. H. , and Richardson R. G. (1995). ‘The biology of Australian weeds.’ Vol 1. (R.G. and F.J. Richardson: Frankston.)

Groves R. H. , Hosking J. R. , Batianoff G. N. , Cooke D. A. , Cowie I. D. , et al (2003). ‘Weed categories for natural and agricultural ecosystem management.’ (Bureau of Rural Sciences: Canberra.)

Hocking P. J. , and Liddle M. J. (1995). Xanthium occcidentale Bertol. complex and X. spinosum L. In: ‘The biology of Australian weeds’. Vol 1. (Eds R. H. Groves, R. C. H. Shepherd and R. G. Richardson.) pp. 241–302. (R.G. and F.J. Richardson: Frankston.)

Houston W. A., Duivenvoorden L. J. (2002) Replacement of littoral native vegetation with the ponded pasture grass Hymenachne amplexicaulis: effects on plant, macroinvertebrate and fish biodiversity of backwater in the Fitzroy River, Central Queensland, Australia. Marine and Freshwater Research 53, 1235–1244.
CrossRef | open url image1

Humphries S. E., Groves R. H., Mitchell D. S. (1991) Plants invasions of Australian ecosystems: a status review and management directions. Kowari 2, 1–116. open url image1

Iaconis L. (2004) How is the national Chilean needle grass program progressing? In: ‘Weed management: balancing people, planet and profit. Proceedings of the 14th Australian Weeds Conference’. (Eds B. M. Sindel and S. B. Johnson.) pp. 636–639. (Weed Society of New South Wales: Sydney.)

Jackson J. (2005) Is there a relationship between herbaceous species richness and buffel grass (Cenchrus ciliaris). Austral Ecology 30, 505–517.
CrossRef | open url image1

Jessop J. (1981). ‘Flora of central Australia.’ (Australian Systematic Botany Society: Sydney.)

Johns G. G., Tongway D. J. , and Pickup G. (1984). Land and water processes. In: ‘Management of Australia’s rangelands’. (Eds G. N. Harrington, A. D. Wilson and M. D. Young.) pp. 25–40. (CSIRO: Melbourne.)

Julien M. H. (1995). Alternanathera philoxeroides (Mart.) Griseb. In: ‘The biology of Australian weeds’. Vol 1. (Eds R. H. Groves, R. C. H. Shepherd and R. G. Richardson.) pp. 1–12. (R.G. and FJ. Richardson: Frankston.)

Julien M. H., Bourne A. S. (1988) Alligator weed is spreading in Australia. Plant Protection Quarterly 3, 91–96. open url image1

Keighery G. J. (1996) Emex australis in Western Australia: an amenity or conservation problem? Plant Protection Quarterly 11, 143–144. open url image1

Keith D. A. , Williams J. E. , and Woinarski C. Z. (2002). Fire management and biodiversity conservation: key approaches and principles. In: ‘Flammable Australia: the fire regimes and biodiversity of a continent’. (Eds R. A. Bradstock, J. E. Williams and A. M. Gill.) pp. 401–428. (Cambridge University Press: Cambridge.)

Latz, P. (1991). Buffel and couch grass in central Australian creeks and rivers. Newsletter of the Central Australian Conservation Council Inc. April 1991, 5.

Lonsdale W. M. (1992). The biology of Mimosa pigra. In: ‘Guide to the management of Mimosa pigra’. (Ed. K. L. S. Harley.) pp. 8–32. (CSIRO: Canberra.)

Lonsdale W. M. , Miller I. L. , and Forno I. W. (1995). Mimosa pigra L. In: ‘The biology of Australian weeds’. Vol 1. (Eds R. H. Groves, R. C. H. Shepherd and R. G. Richardson.) pp. 169–188. (R.G. and F.J. Richardson: Frankston.)

Ludwig J. A., Tongway D. J., Bastin G. N., James C. D. (2004) Monitoring ecological indicators of rangeland functional integrity and their relation to biodiversity at local to regional scales. Austral Ecology 29, 108–120.
CrossRef | open url image1

Mack R. N. (1999). The motivation for importing potentially invasive plant species: a primal urge? In: ‘People and rangelands: building the future. Proceedings of the VI International Rangeland Congress’. Vol 2. (Eds D. J. Eldridge and D. Freudenberger.) pp. 557–562. (VI International Rangeland Congress Inc.: Townsville.)

Mackey A. P. (1998). Acacia nilotica ssp. indica (Benth.) Brenan. In: ‘The biology of Australian weeds’. (Eds F. D. Panetta, R. H. Groves and R. C. H. Shepherd.) pp. 1–18. (R.G. and F.J. Richardson: Frankson.)

Mackey A. P. , and Swarbrick J. T. (1998). Cabomba caroliniana A.Gray. In: ‘The biology of Australian weeds’. Vol 2. (Eds F. D. Panetta, R. H. Groves and R. C. H. Shepherd.) pp. 19–36. (R.G. and F.J. Richardson: Frankston.)

Martin T. G., Campbell S., Grounds S. (2006) Weeds of Australian rangelands. The Rangeland Journal 28, 3–26.
CrossRef |
open url image1

Martin T. G., van Klinken R. D. (2006) Value for money? Investment in weed management in Australian rangelands. The Rangeland Journal 28, 63–75. open url image1

McArdle S. L., Nadolny C., Sindel B. M. (2004) Invasion of native vegetation by coolatai grass Hyparrhenia hirta: impacts on native vegetation and management implications. Pacific Conservation Biology 10, 49–57. open url image1

Mullett T., Simmons D. (1995) The ecological impacts of sweet pittosporum (Pittosporum undulatum Vent.) in dry sclerophyll forest communities, Victoria. Plant Protection Quarterly 10, 131–138. open url image1

Noble J. C. , and Brown J. R. (1997). A landscape perspective on rangeland management. In: ‘Landscape ecology: function and management’. (Eds J. Ludwig, D. Tongway, D. Freudenberger, J. C. Noble and K. C. Hodgkinson.) pp. 79–92. (CSIRO: Melbourne.)

Noble J. C. , McLeod N. , and Griffin G. (1997). The rehabilitation of landscape function in rangelands. In: ‘Landscape ecology: function and management’. (Eds J. Ludwig, D. Tongway, D. Freudenberger, J. C. Noble and K. C. Hodgkinson.) pp. 107–120. (CSIRO: Melbourne.)

Panetta F. D. , Groves R. H. and Shepherd R. C. H. (1998). ‘The biology of Australian weeds.’ Vol 2. (R.G. and F.J. Richardson: Frankston.)

Piggin C. M. , and Sheppard A. W. (1995). Echium plantagineum L. In: ‘The biology of Australian weeds’. Vol 1. (Eds R. H. Groves, R. C. H. Shepherd and R. G. Richardson.) pp. 87–110. (R.G. and F.J. Richardson: Frankston.)

Richardson R. G. , and Hill R. L. (1998). Ulex europaeus L. In: ‘The biology of Australian weeds’. Vol 2. (Eds F. D. Panetta, R. H. Groves and R. C. H. Shepherd.) pp. 269–290. (R.G. and F.J. Richardson: Frankston.)

Room P. M. , and Julien M. H. (1995). Salvinia molesta D.S. Mitchell. In: ‘The biology of Australian weeds’. Vol 1. (Eds R. H. Groves, R. C. H. Shepherd and R. G. Richardson.) pp. 217–230. (R.G. and F.J. Richardson: Frankston.)

Rose S., Fairweather P. G. (1997) Changes in floristic composition of urban bushland invaded by Pittosporum undulatum in northern Sydney, Australia. Australian Journal of Botany 45, 123–149.
CrossRef | open url image1

Rossiter N. A., Setterfield S. A., Douglas M. M., Hutley L. B. (2003) Testing the grass-fire cycle: alien grass invasion in the tropical savannas of northern Australia. Diversity and Distributions 9, 169–176.
CrossRef | open url image1

Rossiter N. , Setterfield S. , Douglas M. , Hutley L. , and Cook G. (2004). Exotic grass invasion in the tropical savanna of northern Australia: ecosystem consequences. In: ‘Weed management: balancing people, planet and profit. Proceedings of the 14th Australian Weeds Conference’. (Eds B. M. Sindel and S. B. Johnson.) pp. 168–171. (Weed Society of New South Wales: Sydney.)

Sattler P. , and Williams R. (1999). ‘The conservation status of Queensland’s bioregional ecosystems.’ (Environmental Protection Agency: Brisbane.)

Setterfield S. A. , Bellairs S. , Douglas M. M. , and Calnan T. (2004). Seed banks dynamics of two exotic grass species in Australia’s northern savannas. In: ‘Weed management: balancing people, planet and profit. Proceedings of the 14th Australian Weeds Conference’. (Eds B. M. Sindel and S. B. Johnson.) pp. 555–557. (Weed Society of New South Wales: Sydney.)

Sheppard A. W. (2000). Weed ecology and population dynamics. In: ‘Australian weed management systems’. (Ed. B. M. Sindel.) pp. 39–60. (R.G. and F.J. Richardson: Frankston.)

Smith J. M. B. (1994) The changing ecological impact of broom (Cytisus scoparius) at Barrington Tops, New South Wales. Plant Protection Quarterly 9, 6–11. open url image1

Smyth A. K., James C. D. (2004) Characteristics of Australia’s rangelands and key design issues for monitoring biodiversity. Austral Ecology 29, 3–15.
CrossRef | open url image1

SoEAC (1996). ‘State of the environment Australia 1996. State of the Environment Advisory Council, Department of the Environment, Sport and Territories.’ (CSIRO Publishing: Melbourne.)

Sorensen B. , and Jusaitis M. (1995). The impact of bridal creeper on an endangered orchid. In: ‘Weeds of conservation concern’. (Eds D. Cooke and J. Choate.) pp. 27–31. (Department of Environment and Natural Resources and Animal and Plant Control Commission: Adelaide.)

Stansbury C. D., Vivian-Smith G. (2003) Interactions between frugivorous birds and weeds in Queensland as determined from a survey of birders. Plant Protection Quarterly 18, 157–165. open url image1

Swarbrick J. T. , Finlayson C. M. , and Cauldwell A. J. (1995). Hydrillla verticillata (L.f.) Royle. In: ‘The biology of Australian weeds’. Vol 1. (Eds R. H. Groves, R. C. H. Shepherd and R. G. Richardson.) pp. 137–147. (R.G. and F.J. Richardson: Frankston.)

Swarbrick J. T., Willson B. W., Hannan-Jones M. A. (1998) The biology of Australian weeds 25: Lantana camara L. Plant Protection Quarterly 10, 82–95. open url image1

Thorp J.R. and Lynch R. (2000). ‘The determination of Weeds of National Significance.’ (National Weeds Strategy Executive Committee: Launceston.)

Tomley A. J. (1998). Cryptostegia grandiflora Roxb. ex R.Br. In: ‘The biology of Australian weeds’. Vol 2. (Eds F. D. Panetta, R. H. Groves and R. C. H. Shepherd.) pp. 63–76. (R.G. and F.J. Richardson: Frankston.)

Vidler S. (2004). Using your cute and furries: the role of threatened species in weed awareness. In: ‘Weed management: balancing people, planet and profit. Proceedings of the 14th Australian Weeds Conference’. (Eds B. M. Sindel and S. B. Johnson.) pp. 652–658. (Weed Society of New South Wales: Sydney.)

Virtue J. G. , Bennett S. J. , and Randall R. P. (2004). Plant introductions in Australia: how can we resolve ‘weedy’ conflicts of interest? In: ‘Weed management: balancing people, planet and profit. Proceedings of the 14th Australian Weeds Conference’. (Eds B. M. Sindel and S. B. Johnson.) pp. 42–48. (Weed Society of New South Wales: Sydney.)

Waterhouse B. M. (1988) Broom (Cytisus scoparius) at Barrington Tops, New South Wales. Australian Geographical Studies 26, 239–248. open url image1

Weiss P. W. (1984) Seed characteristics and regeneration of some species in invaded coastal dune communities. Australian Journal of Ecology 9, 99–106. open url image1

Weiss P. W., Noble I. R. (1984a) Interactions between seedlings of Chrysanthemoides monilifera and Acacia longifolia. Australian Journal of Ecology 9, 107–115. open url image1

Weiss P. W., Noble I. R. (1984b) Status of coastal dune communities invaded by Chrysanthemoides monilifera. Australian Journal of Ecology 9, 93–98. open url image1

Wright A. D. , and Purcell M. F. (1995). Eichhornia crassipes (Mart.) Solms-Laubach. In: ‘The biology of Australian weeds’. Vol 1. (Eds R. H. Groves, R. C. H. Shepherd and R. G. Richardson.) pp. 111–121. (R.G. and F.J. Richardson: Frankston.)








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