Weeds are plant species that have come from somewhere else and do not belong on our country. Weeds compete with native plants for habitat, reduce food and habitats for native animals, change grassy fuel loads and fire regimes, and make it very hard for people to move about country. Weed species can spread quickly when country has been damaged – by feral pigs and buffalo, for example, or land clearing for roads and buildings.
Our weed threat relates to weed species that could invade in the future, and those already present on our country. Our main weed threats are pasture grasses, particularly highly invasive ones such as gamba grass (Andropogon gayanus – a Weed of National Significance), perennial mission grass (Pennisetum pedicellatum) and grader grass (Themeda quadrivalvis). We also face an ongoing threat from another Weed of National Significance, Mimosa pigra, which has the potential to destroy our highly productive floodplain habitats if uncontrolled.
We collaborate with landowners, djungkay and our partners to implement an annual control strategy for priority weed species. We are continuing our successful community weed education activities through the Learning on Country program, and have established partnerships with neighbouring land management authorities including Kakadu National Park, and government agencies, to prevent further incursion of weed species within the Djelk IPA.
Our long-term goal focuses on achieving reduced levels of weeds in 10 key areas in the Djelk region and ensuring weeds in all areas do not move beyond 2014 levels.