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Invasive Plants in the Floodplains of Australia’s Kakadu National Park

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Plant Invasions in Protected Areas

Part of the book series: Invading Nature - Springer Series in Invasion Ecology ((INNA,volume 7))

Abstract

Kakadu National Park is Australia’s premier protected area and one of the few World Heritage areas listed for both its natural and cultural heritage values. Kakadu National Park encompasses vast areas of seasonally inundated wetlands that support an outstanding abundance of biodiversity, particularly birds and fish. The wetlands provide critical resources for the Indigenous landowners and are also a major tourist attraction. The international importance of Kakadu National Parks’ wetlands is also reflected by their listing under the Ramsar Wetlands Convention. Unfortunately, these wetlands are under substantial threat from a range of high impact invasive alien plants. The response of managers to different invasive alien plants has varied substantially. For example, the response by Kakadu National Park managers to the threat from the alien shrub Mimosa pigra has widely been used as a case study of best practice. The response was rapid, appropriately resourced, consistent over time and well-monitored. In contrast, the response to two aquatic invasive alien grass species, Hymenachne amplexicaulis and Urochloa mutica, has been relatively poor. Subsequently, whereas M. pigra remains under control, with a limited number of small infestations, the alien grasses have spread extensively in recent years and now pose a substantial threat. This chapter explores the history, invasion and management response to invasive alien grass management in Kakadu National Park. We suggest actions that should commence immediately to avoid wasting the past efforts made to save Kakadu National Park’s wetland ecosystems from M. pigra, and prevent their conversion into invasive alien grass dominated systems.

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Acknowledgements

We thank Anne O’Dea, Buck Salau, Bert Lukitsch for information, data and advice.

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Authors and Affiliations

  1. National Environmental Research Program, Northern Australia Hub, Charles Darwin University, Darwin, NT, 0909, Australia

    Samantha A. Setterfield, Michael M. Douglas, Aaron M. Petty, Peter Bayliss & Keith B. Ferdinands

  2. CSIRO, GPO Box 2583, Brisbane, QLD, 4001, Australia

    Peter Bayliss

  3. Department of Land Resource Management, Weeds Management Branch, Palmerston, NT, 0831, Australia

    Keith B. Ferdinands

  4. Kakadu National Park, 71, Jabiru, NT, 0886, Australia

    Steve Winderlich

Authors
  1. Samantha A. Setterfield
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  2. Michael M. Douglas
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  3. Aaron M. Petty
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  4. Peter Bayliss
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  5. Keith B. Ferdinands
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  6. Steve Winderlich
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Corresponding author

Correspondence to Samantha A. Setterfield .

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Editors and Affiliations

  1. South African National Parks, Centre for Invasion Biology Conservation Services, Skukuza, South Africa

    Llewellyn C. Foxcroft

  2. Department of Invasion Ecology, Academy of Sciences of the Czech Republic Institute of Botany, průhonice, Czech Republic

    Petr Pyšek

  3. Department of Botany and Zoology, Stellenbosch University Center for Invasion Biology, Stellenbosch, South Africa

    David M. Richardson

  4. ISPRA Institute for Environmental Protection and Research, and Chair IUCN SSC Invasive Species Specialist Group, Rome, Italy

    Piero Genovesi

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Setterfield, S.A., Douglas, M.M., Petty, A.M., Bayliss, P., Ferdinands, K.B., Winderlich, S. (2013). Invasive Plants in the Floodplains of Australia’s Kakadu National Park. In: Foxcroft, L., Pyšek, P., Richardson, D., Genovesi, P. (eds) Plant Invasions in Protected Areas. Invading Nature - Springer Series in Invasion Ecology, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-7750-7_9

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