Explain the principles of ecologically sustainable development and evaluate conservation and management strategies used to protect Tasmanian ecosystems.

What this dot point is asking

This dot point asks you to explain what ecologically sustainable development means and to evaluate the strategies used to conserve and manage ecosystems. You should know the core principles of sustainability, describe a range of conservation strategies, and judge their strengths and limitations using Tasmanian examples.

What ecologically sustainable development means

Ecologically sustainable development (ESD) seeks to use the environment to meet human needs today without degrading the systems future generations will rely on. It tries to integrate three dimensions: environmental health, social wellbeing and economic activity. Decisions are judged by whether they keep ecosystems functioning while still allowing people to make a living.

Several principles guide ESD.

• Intergenerational equity means leaving the environment in a condition at least as good as we found it, so future generations have the same opportunities.
• The precautionary principle means that where an action risks serious or irreversible harm, a lack of full scientific certainty should not be used to justify delaying protection.
• Conservation of biological diversity and ecological integrity means maintaining the variety of life and the processes that sustain it.
• Improved valuation means recognising the economic value of ecosystem services so they are not treated as free.

Conservation strategies

Conservation strategies aim to protect biodiversity and ecological function, and they work at different scales.

Protected areas set aside land or sea for conservation. The Tasmanian Wilderness World Heritage Area protects extensive tracts of rainforest, alpine and wild-river ecosystems, conserving habitat and the ecosystem services these landscapes provide. Marine protected areas and reserves do similar work in the sea.

Threatened-species programs target particular species at risk. The captive insurance population and disease-free island populations of Tasmanian devils, established in response to Devil Facial Tumour Disease, aim to keep the species from extinction while wild numbers recover.

Sustainable harvesting sets catch or harvest limits, such as quotas in the rock lobster and abalone fisheries, so that renewable resources are used no faster than they can replenish. Habitat restoration, weed and feral animal control, and revegetation rebuild degraded ecosystems.

Community and Indigenous involvement strengthens conservation. Aboriginal land management, including the careful use of fire, has shaped Tasmanian landscapes for thousands of years, and integrating this knowledge improves modern management.

Evaluating strategies

No single strategy is sufficient, and each has trade-offs. Protected areas conserve habitat but can shift pressure onto unprotected land and may exclude some traditional or economic uses. Threatened-species programs can save a species but are costly and do not address the original threat. Sustainable harvesting depends on accurate monitoring and enforcement, and quotas set too high still deplete stocks. Evaluating a strategy means weighing how well it conserves biodiversity against its social and economic costs, and whether it tackles the underlying cause of decline.

Bringing it together

To answer this dot point well, define ecologically sustainable development and explain its key principles, describe a range of conservation strategies such as protected areas, threatened-species programs and sustainable harvesting, and evaluate them using Tasmanian examples such as the Wilderness World Heritage Area and the devil insurance population. Always weigh environmental, social and economic factors together.