Australia's biodiversity

Review of the National Strategy for the Conservation of Australia's Biological Diversity

Australian and New Zealand Environment and Conservation Council
Environment Australia, 2001
ISBN 0 6425 4734 3

Chapter 3: Managing threatening processes

Australia has made some progress in managing its threatening processes. The long-term decline in the quality and extent of Australia's native vegetation communities is being addressed through a range of Commonwealth, State and Territory and local government programs. The ANZECC National Framework for the Management and Monitoring of Australia's Native Vegetation (1999) is an example of a national approach to address this issue.

In addition to the clearance of native vegetation, major threats to biodiversity conservation are salinity, inappropriate water resource management regimes and invasive species.

Key results

3.1 Threatening processes and activities

Monitor, regulate and minimise processes and categories of activities that have or are likely to have significant adverse impacts on the conservation of biological diversity and be able to respond appropriately to emergency situations.

Assessment: Not achieved

Vegetation clearance, modification and fragmentation remain major threats to biodiversity conservation in Australia. Invasive species are a significant threatening process (see Objective 3.3) as well as inappropriate flow regimes (see Objective 2.5). In general the degradation of ecosystems through a range of processes is a major problem of growing importance.

Substantial progress has been made in ecological monitoring, particularly of aquatic ecosystems. This includes the national coordinated activities of the National Land and Water Resources Audit and the National River Health Program. However, outside these nationally coordinated activities much activity is taking place on an ad hoc basis. Complicating this issue there appears to be insufficient information exchange between the research institutes, government jurisdictions and others. A long-term monitoring approach is required (see Chapter 4: Improving our Knowledge).

More significantly perhaps, current monitoring measures are unlikely to be sufficient to protect specific species or rare genotypes, nor do they provide sufficient early warning of threatening processes and activities.

Whilst the EPBC Act provides a broad framework for regulating threatening processes (particularly for issues of national significance) it is in State and Territory jurisdictions that responsibility for regulation of many threatening processes lies.

Salinity has emerged as a potential significant threat to biodiversity, particularly in Western Australia and the Murray-Darling Basin. Other riverine systems are also being affected. The magnitude of the problem is not clearly known. Monitoring is important to identify the severity of the problem, the hydrological processes at work and possible response measures. Salinity is not only a threat to biodiversity but also a result of the loss of biodiversity.

Activities

See also COAG water reforms (Objective 2.5). Other activities are also given under Chapter 3, Objectives 3.2 - 3.8.

3.2 Clearing of native vegetation

Ensure effective measures are in place to retain and manage native vegetation, including controls on clearing.

Assessment: Not achieved

Considerable progress has been made in putting measures in place to control land clearing since the Strategy was released. There are critical gaps in coverage and some of the legislation currently in place may need to be strengthened in order to achieve this goal. Targets and on-ground action need to be incorporated into the State, Territory and Commonwealth work plans developed under the National Framework for the Management and Monitoring of Australia's Native Vegetation (1999). The identification and listing of critical habitat under the EPBC Act will also be relevant to achieving this goal.

Activities

3.3 Alien species and genetically modified organisms

Control the introduction and spread of alien species and genetically modified organisms and manage the deliberate spread of native species outside their historically natural range.

Assessment: Partially achieved

The Environmental Indicators for National State of the Environment Reporting: Biodiversity states those exotic and alien organisms outside cultivation or captivity is a major pressure on biological diversity. The report goes on to state that the number of such organisms outside cultivation and captivity is reasonably well known for vertebrates, higher plants and some invertebrates, but knowledge is poor for most other organisms except the more obvious problem organisms such as Phytophthora cinnamomi in south-western Australia.

The role of the Commonwealth in invasive species management has traditionally been barrier control through the Quarantine Act 1908 and the assessment of environmental impacts on native species through the Wildlife Protection (Regulation of Exports and Imports) Act 1982. Commonwealth involvement is otherwise restricted to Commonwealth lands.

Local and State Governments have a range of legislative and regulatory mechanisms covering invasive species. The management of invasive species within Australia is primarily the responsibility of individual landowners or land managers. There has been a focus in the past on managing invasive species that threaten economic production rather than environmental values. This, however, is changing as States and Territories, through threat abatement processes, aim to reduce invasive species pressure on threatened or endangered flora or fauna. There has also been a shift towards classifying invasive species by their impact on biodiversity rather than their economic effects.

There has been considerable activity on terrestrial and marine invasive species in all jurisdictions with a number of success stories. Despite this, invasive species continue to pose a major threat to biodiversity and ongoing action is essential.

Activities

3.4 Pollution control

Minimise and control the impacts of pollution on biological diversity.

Assessment: Partially achieved

Pollution continues to be a threat to the conservation of biological diversity in Australia. Air pollution ranks as the Australian public's number one environmental health concern. Control measures established to protect human health could be effective in protecting a wide range of other species.

Marine and freshwater pollution is a particular threat to biodiversity, as pollutants tend to accumulate and concentrate in these environments. Problems of marine pollution are usually linked to major centres of human population. For example, the main source of oil pollution in marine environments is urban runoff. This source can also include more toxic pollutants – for example, heavy metals such as lead, mercury and zinc – and is thus dealt with by State and Territory environment protection agencies.

Activities

3.5 Fire

Reduce the adverse impacts of altered fire regimes on biological diversity.

Assessment: Partially achieved

With the increasing awareness of the importance of maintaining biological diversity, appropriate fire regimes which take into consideration the frequency and extent of disturbance are, for the most part, being developed and implemented by forest and other land management agencies. Management agencies face resource constraints that limit their ability to maintain traditional fire regimes. Other objectives, such as the protection of human life and property, have to be balanced with biodiversity conservation objectives.

Not enough information is available on whether biodiversity conservation is effectively addressed by State fire management planning. There needs to be wider agency participation and coordination. This issue also needs to be considered across all land tenures and ecosystems. Further work in these areas is required.

Activities

3.6 Impacts of climate change on biological diversity

Plan to minimise the potential impacts of human-induced climate change on biological diversity.

Assessment: Not achieved

If global climate change causes climatic zones to shift across the continent of Australia, integrated strategic planning will be essential to ensure Australia's biodiversity survives. Plants and animals are adapted to particular climatic regimes and are limited in their distribution by this. Significant climate change will mean that biodiversity must either gradually move away from areas that become unsuitable or, if possible, adapt to the new climate. Reserves need to be selected, designed, linked with vegetation corridors and managed to provide the conditions for biodiversity to be able to gradually alter its distribution in response to climate change.

Within the agricultural community there is a growing awareness of the need for integrated management practices which include more sustainable farming systems to enhance productivity and long-term viability. New greenhouse response measures in the agricultural sector aim to build on this awareness by providing appropriately tailored and targeted information to incorporate consideration of greenhouse issues into agricultural management practices.

Considerable effort is being put into a range of revegetation activities as part of Australia's greenhouse response measures. This work needs to be planned to ameliorate the impact of climate change on native biodiversity.

Activities

3.7 Rehabilitation

Repair and rehabilitate areas to restore their biological diversity.

Assessment: Partially achieved

Given the scale of land clearing, dry land salinity and other impacts on biodiversity, areas needing rehabilitation can be expected to increase for many years. Projects funded under the Natural Heritage Trust and by the States and Territories are detailed under Activities. There is a continuing need for investment in this area by governments and, increasingly, by the private sector to reverse the long-term decline in the quality and extent of Australia's native vegetation.

Activities

3.8 Environmental assessment

Ensure that the potential impacts of any projects, programs and policies on biological diversity are assessed and reflected in planning processes, with a view to minimising or avoiding such impacts.

Assessment: Achieved

Environmental impact legislation is in place in the Commonwealth and each State and Territory. The application and scope of such legislation varies considerably between jurisdictions. The COAG Heads of Agreement on Commonwealth/State Roles and Responsibilities for the Environment provides for the Commonwealth to focus on matters of national environmental significance. This approach is being implemented through the EPBC Act which came into effect on 16 July 2000. To eliminate duplication, the Act sets out the basis for bilateral agreements with the Commonwealth for accreditation of State and Territory environmental impact assessment processes.

Strategic environmental assessment provides the opportunity for environmentally significant factors to be taken into account in the development, approval and implementation of policies, plans and programs. It may also be applied to classes of development proposals, or to staged development proposals, in order to facilitate early consideration of environmental matters and more efficient assessment and approval processes.

Ongoing action is required to implement Commonwealth, State and Territory legislation and to make environmental impact assessment compulsory for programs and policies.

Activities

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