09085: Calotropis control – Annie Creek

    Calotropis (rubber bush) control at Annie Creek. Courtesy Australian Wildlife Conservancy
    Calotropis (rubber bush) control at Annie Creek. Courtesy Australian Wildlife Conservancy

    In its lower reaches, Annie Creek is one of few watercourses in the Kimberley in near natural condition. Community action to exclude stock and to manage burning along the creek has had great ecological benefits but has come with the unexpected consequence of favouring the incursion of a declared weed known as rubber bush (calotropis).

    The Australian Wildlife Conservatory controlled rubber bush along Annie creek with the help of the local community and funding from the State NRM Program.

    The aim of this work was to significantly reduce the distribution and abundance of calotropis in the Annie Creek Catchment by controlling around 5000 calotropis plants with two treatments. The project also aimed to:

    • demonstrate how successful treatment is conducted
    • show a marked decrease in the density of calotropis plants
    • show an increase in the abundance, distribution or health of riparian specialists
    • provide NRM employment and knowledge exchange with local Indigenous community members.
    Investment: $ 24 000
    In-kind contribution: $ 6 000
    Other contribution: $ 69
    Delivery organisation: Australian Wildlife Conservancy
    Project duration: July 2010 - December 2011
    Location: Annie Creek, which encompasses Glenroy/Mount House Station and Mornington Wildlife Sanctuary in the middle Fitzroy Catchment

    Major project achievements

    • The entirety of Annie Creek catchment was traversed on foot to 100 m either side of the creek and its tributaries. All calotropis plants in this area were treated, amounting to approximately 5000 plants.
    • Over 70 work days were used to employ local Indigenous contractors from the Tirralintji-Yulumbu communities.
    • Other weeds (clitoria, chloris, passiflora) were also treated in the Annie Creek catchment.

    Project partners

    North Kimberley Land Conservation District Committee

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