Evaluate management and conservation strategies for ecosystems and biodiversity at different scales, including in-situ and ex-situ conservation, protected area frameworks, restoration, Indigenous land management, and global agreements

Note: This page is part of the HSC Geography 11-12 (2022) syllabus, first examined in HSC 2025. The legacy 2009 syllabus "Ecosystems at Risk" content is preserved in sibling folders.

What this dot point is asking

This dot point asks you to evaluate conservation strategies. Identifying strategies is the easy part; evaluation requires you to judge effectiveness, equity and limits at different scales. You need to know the distinction between in-situ and ex-situ approaches, the IUCN protected-area categories, the role of restoration ecology, the central place of Indigenous land management in Australian conservation, and the current global framework (the Convention on Biological Diversity and its 2022 Kunming-Montreal implementation plan). Lean on the geographical concepts of scale, sustainability, interconnection and change.

The answer

In-situ vs ex-situ conservation

In-situ conservation protects species in their natural habitat. It includes national parks, marine protected areas, biosphere reserves, conservation covenants on private land, and Indigenous Protected Areas. The advantages are that the species remains part of its ecosystem and continues to evolve in response to its environment; the disadvantages are that it cannot help if the habitat itself is unsalvageable or if the threats are mobile (climate change, disease).

Ex-situ conservation protects species outside their natural habitat. It includes zoos, captive-breeding programs, seed banks, botanic gardens and aquaria. The advantages are control over breeding, disease and predation; the disadvantages are loss of natural-selection pressure, cost per individual, and the difficulty of reintroduction. Ex-situ programs are typically a complement to in-situ approaches, not a substitute.

Examples that combine both:

• Tasmanian devil insurance populations. Devil Facial Tumour Disease has reduced wild populations. Captive insurance populations and translocation to a toad-free, disease-free island (Maria Island) combine ex-situ and in-situ methods.
• Wollemi pine. Discovered in a single small canyon in 1994; protected in-situ with secret site locations plus extensive ex-situ propagation in botanic gardens and the horticultural trade as a hedge against site loss.
• Norfolk Island green parrot. Combination of in-situ nest-site protection and captive breeding.

Protected area frameworks

The IUCN protected area categories are the global standard:

• Category Ia. Strict nature reserve. Highest level of protection; minimal human use.
• Category Ib. Wilderness area. Large, mostly undisturbed.
• Category II. National park. Protection plus public access.
• Category III. Natural monument or feature.
• Category IV. Habitat or species management area.
• Category V. Protected landscape or seascape. Includes ongoing human use that maintains landscape character.
• Category VI. Sustainable use of natural resources. Includes Indigenous and community-managed areas.

The Australian National Reserve System (NRS) is a partnership of Commonwealth, state, territory, private and Indigenous reserves that together aim to represent each of Australia's bioregions. Marine protected areas form a separate but parallel network, including the Great Barrier Reef Marine Park (declared 1975, zoning plan 1981 and expanded 2004) and the network of Commonwealth Marine Parks.

Effectiveness depends on management not just designation. A "paper park" with no enforcement provides minimal protection. Strong evaluations look at whether the protected area is well-resourced, whether it covers the full range of habitat needed by the species, and whether threats inside the boundary (invasive species, climate change, illegal harvest) are being actively managed.

Restoration ecology

Ecological restoration aims to return a degraded ecosystem toward a reference state. Major approaches:

• Revegetation. Planting native species in cleared landscapes. Examples include the Gondwana Link project in Western Australia and various Landcare projects across Australia.
• Reintroduction. Returning a locally extinct species to an area. Examples include eastern bettong reintroduction at Mulligans Flat (ACT) and bilby reintroductions across several arid-zone fenced sanctuaries.
• Feral and weed control. Fox baiting, cat removal, lantana control, buffel grass management.
• Fire management. Reintroducing low-intensity patch-burning consistent with traditional Indigenous fire management.
• Rewilding. Larger-scale return of ecological processes, sometimes including reintroduction of ecologically functional species or analogues.

Restoration is slow and expensive; outcomes vary; long-term monitoring is essential. The geographical concept of change is central: a restored ecosystem is not a return to a static past but a managed trajectory toward greater resilience.

Indigenous land management

Indigenous peoples have been actively managing Australian ecosystems for tens of thousands of years. Recognition of Indigenous land management as central to conservation has grown significantly in the last three decades.

Cultural burning

Patch-burning by Traditional Owners produces a fine-grained mosaic of different fire histories, reduces fuel loads, encourages food plants and animals, and limits large-scale destructive fire. The West Arnhem Land Fire Abatement (WALFA) project and similar Indigenous Ranger programs use traditional fire knowledge alongside contemporary monitoring tools (satellite imagery, GIS).

Indigenous Protected Areas (IPAs)

IPAs are areas of land and sea voluntarily declared and managed by Traditional Owners as part of the National Reserve System. There are over 80 declared IPAs in Australia, covering a very substantial share of the National Reserve System area. The IPA program supports Indigenous Ranger groups (the federal Working on Country and Indigenous Rangers programs) that combine traditional knowledge with contemporary conservation tools.

Joint management

Some national parks (Uluru-Kata Tjuta, Kakadu, Booderee) are managed jointly between Traditional Owners and government agencies under formal agreements.

Evidence from published comparative studies shows that Indigenous-managed lands often achieve biodiversity outcomes equal to or better than conventionally managed protected areas, often at lower cost. This is a major reframing of conservation in Australia and globally.

Global agreements

The Convention on Biological Diversity (CBD, 1992) is the parent treaty for global biodiversity governance. It has three objectives: conservation of biodiversity, sustainable use of components, and fair sharing of benefits from genetic resources. Australia is a party.

The Kunming-Montreal Global Biodiversity Framework (December 2022, CBD COP15) is the current implementation plan. It contains 23 targets to 2030 and four longer-term goals to 2050. The headline target is "30 by 30": protecting at least 30 percent of land and 30 percent of marine areas by 2030. Other targets address pollution, restoration of degraded ecosystems, sustainable use, and equitable benefit-sharing including with Indigenous peoples and local communities.

The framework replaced the earlier Aichi Biodiversity Targets (set in 2010 to 2020). The Aichi targets were largely missed at global scale, which informs realistic evaluation of any current commitment.

Other relevant treaties:

• CITES (1975). Controls international trade in endangered species.
• Ramsar Convention (1971). Protects wetlands of international importance.
• World Heritage Convention (1972). Lists sites of outstanding natural and cultural value (the Great Barrier Reef was listed in 1981).

Examples in context

Example 1. The Kunming-Montreal Global Biodiversity Framework (December 2022). The Convention on Biological Diversity adopted the Kunming-Montreal Framework at COP15 in Montreal in December 2022. The framework's 23 targets and four 2050 goals include the headline "30 by 30" commitment to protect 30 percent of land and 30 percent of ocean by 2030. Australia is a party. Implementation requires expanding the National Reserve System, expanding marine protected areas, and partnering with Traditional Owners through Indigenous Protected Areas and other arrangements. The geographical concept of scale is central: a global commitment translates into national, state, regional, Traditional Owner and private-land decisions about which areas to protect, how to manage them, and how to fund management.

Example 2. The Mulligans Flat-Goorooyarroo woodland experiment (ACT). Mulligans Flat Nature Reserve, on the northern edge of Canberra, is one of Australia's most carefully studied restoration sites. A predator-proof fence, reintroduction of locally extinct species (eastern bettong, eastern quoll, bush stone-curlew, brown treecreeper), removal of foxes and rabbits, and long-term monitoring have made it a model for restoration ecology in temperate woodland. The case demonstrates in-situ conservation at a manageable scale, the use of fences as an island-biogeography intervention, and the importance of long-term ecological monitoring. It also illustrates the limits of fenced sanctuaries: protected populations are not subject to natural selection from predators and cannot easily be expanded beyond the fence.

Try this

Q1. Distinguish between in-situ and ex-situ conservation, with one Australian example of each. [4 marks]

• Cue. In-situ: protect species in habitat (e.g. Kakadu National Park, Indigenous Protected Areas). Ex-situ: protect outside habitat (e.g. Tasmanian devil insurance populations, Wollemi pine propagation, Australian Seed Bank).

Q2. Explain the role of Indigenous Protected Areas in the Australian conservation system. [6 marks]

• Cue. Over 80 declared IPAs; substantial share of the National Reserve System. Cultural burning, Ranger programs, combined traditional knowledge and contemporary tools. Comparative evidence suggests outcomes equal to or better than conventional protected areas. Aligns conservation with Indigenous rights and self-determination.

Q3. Evaluate the effectiveness of global agreements (Convention on Biological Diversity, Kunming-Montreal Framework) in conserving biodiversity at different scales. [8 marks]

• Cue. Strengths: global framework, peer accountability, 30 by 30 area target, recognition of Indigenous knowledge. Weaknesses: voluntary, Aichi targets to 2020 largely missed, implementation depends on national capacity, climate change addressed in a separate treaty regime. Reach a calibrated judgement; reference scale and equity as geographical concepts.