Ana səhifə

Kakadu National Park Landscape Symposia Series 2007–2009


Yüklə 5.42 Mb.
səhifə6/16
tarix25.06.2016
ölçüsü5.42 Mb.
1   2   3   4   5   6   7   8   9   ...   16

2.6 Local weed management: Kakadu National Park


In comparison with other national parks and reserves across Australia, Kakadu has surprisingly few weeds (less than 6% of the total number of plant species known from the Park are weed species). Despite this, there are some major weed issues facing the Park, including the continued spread of a number of WoNS species and introduced grasses. Some of the regional priority weed species identified by the Weeds Management Branch are currently found within Kakadu National Park or represent a significant threat. Accordingly these species are targeted for control or eradication or exclusion by both Kakadu staff and Weeds Branch programs.


Figure 1 Mimosa distribution and management activities in the Top End

In the case of mimosa at Kakadu National Park where infestations are at a very low level management objectives and activities reflect this as the overall objectives are to increase awareness of the species, prevent further introduction and eradicate existing plants. A similar approach is also taken with other priority species such as olive hymenachne, gamba grass, salvinia and bellyache bush. The aims and objectives for all of these species individually reflect the current and potential situation, the regional management plans, and where relevant, the priority species management plans for the NT.

We can also see that the principles of the Australian Weed Strategy provide a logical and supporting framework for local management activities and their associated aims and objectives. More specifically we can clearly see that an informed risk management approach ensures the correct species are targeted as priorities in Kakadu.

We can see that prevention and early intervention through management of roadside infestations and implementation of quarantine policy on the Park help reduce new incursions. We can see the importance of coordination and effective partnerships between all levels of government and the community providing strategic benefits across the region. We can also see that the benefits of building capacity across the community is fundamental to providing additional protection to Kakadu through the development and implementation of complimentary weed management programs targeting the same species on adjoining lands.

Finally we can see how the Australian Weeds Strategy, national species management strategies, priorities species for the NT, their associated strategies and also regional weed management planning, provide a clear link between planning occurring at the national level and management activities implemented locally (see below).

National Weeds Strategy


Key national principles, aims and objectives

WoNS strategies

National level strategies to address the agreed 20 worst species in Australia

NT priority species list & management plans

Includes all relevant WoNS species + additional identified and assessed priority species for the NT. Provides NT level management plans and associated aims, objectives and management requirements.

Regional priorities

Includes a subset of the WoNS list where applicable + additional identified and assessed priority species for the region. Provides and reflects a regional perspective to NT and national level plans.

Local priorities and activities

Includes a subset of applicable regional priorities. Management activities reflect the local current situation


References


Department of the Environment and Water Resources 2007. Australian Weeds Strategy – a national approach for weed management in Australia. Natural Resource Management Ministerial Council, Commonwealth of Australia, Canberra.

Agriculture & Resource Management Council of Australia & New Zealand, Australian & New Zealand Environment and Conservation Council and Forestry Ministers 2001. Weeds of National Significance Mimosa (Mimosa pigra) Strategic Plan.



Department of Natural Resources, Environment, the Arts and Sport 2008. Draft Weed Management Plan for Mimosa pigra (Mimosa), NRETAS, Darwin NT.

3 Developing a WRM system in the Northern Territory, Australia

K Ferdinands2, S Setterfield3 & M Ibbett4

3.1 Focus summary


  • Despite the threat invasive plants pose to the conservation of native flora and fauna and ecosystem processes, as well as threatening agricultural industries, infrastructure and human health, resources available to tackle risks posed by invasive plants in the Northern Territory will always be limited.

  • Natural resource managers need a defensible and transparent system to prioritise species for action and to efficiently allocate the resources at their disposal.

  • Weed risk management (WRM) systems are recognised internationally as useful to assist land managers with the task of prioritising and managing weed species.

  • The NT WRM process has been developed through extensive consultation among key stakeholders and government agencies to address the issue of strategic weed management in the NT. It is consistent with nationally accepted protocols for post-border weed risk management.

  • The NT WRM system consists of a two-stage risk-assessment process: (i) an assessment of the comparative risk a species poses (Weed Risk Assessment WRA) and (ii) an assessment of the likelihood of management intervention success (feasibility of control). Weed risk and feasibility of control are assessed using a list of questions about the species biology, invasiveness and negative impacts, current and potential future distribution and costs / complexity of control measure required for a given species. For ‘conflict species’ – species that offer economic benefits as well as potential environmental, social or cultural costs – a benefit cost analysis can also be undertaken before a final management recommendation is made.

  • Using the NT WRM system 80 species have been assessed. The assessment results showed that a number of species that are currently declared in the NT may need their declaration status reviewed, and more importantly, some species that are currently not declared should be added to the declared list to ensure coordinated and strategic management of these high risk species.

  • The outcomes of the NT WRM process are being used to (a) review the current list of declared species in the NT; (b) to provide advice to natural resource managers and policy makers on both priority species and the type of management response required and (c) provide an transparent and defensible approach, with active stakeholder engagement for responding to the risks posed by invasive plants in the NT and across northern Australia.
1   2   3   4   5   6   7   8   9   ...   16


Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©atelim.com 2016
rəhbərliyinə müraciət