Saving the Great Barrier Reef requires action on two fronts simultaneously: reducing global carbon emissions to slow ocean warming, and managing local threats like pollution, predators, and overfishing to give corals the best chance of surviving the warming that’s already locked in. Neither approach works alone. The reef lost significant coral cover in 2024-2025, with hard coral declining across all three regions, dropping to 30% in the north, 28.6% in the central section, and 26.9% in the south. The situation is serious, but the reef is not beyond help.
Why Temperature Is the Biggest Threat
Corals bleach when ocean temperatures rise just 1°C above the average peak summer temperature for one month. If temperatures climb 2°C above that average for a month, or stay 1°C above it for two months, corals begin to die. That narrow margin explains why even small shifts in global temperature have outsized effects on reef systems.
The math at the global scale is stark. If the planet warms 1.5°C above pre-industrial levels, 70 to 90 percent of the world’s coral reefs are projected to disappear. At 2°C of warming, that figure rises to 99 percent. The difference between 1.5 and 2 degrees is essentially the difference between a diminished reef and no reef at all. Every fraction of a degree matters, which is why climate policy sits at the center of any serious reef conservation strategy.
What the Australian Government Is Doing
The Australian and Queensland governments have invested more than $3 billion (AUD) over the decade from 2014 to 2024 under the Reef 2050 Long-Term Sustainability Plan. That plan sets targets across water quality, biodiversity, pest management, and climate adaptation. Its stated vision is to sustain the Great Barrier Reef “as a living natural and cultural wonder of the world” through 2050.
Key goals include contributing to global efforts under the Paris Agreement to hold warming well below 2°C (and ideally to 1.5°C), improving water quality flowing into the reef from agricultural land, reducing threats from legal and illegal fishing, preventing outbreaks of disease and invasive species, and actively rehabilitating damaged habitats. The plan also formally recognizes Traditional Owner rights, aiming to incorporate Indigenous heritage and management into every facet of reef stewardship.
Cleaning Up What Flows Into the Reef
Fertilizer and sediment washing off farmland into reef waters is one of the largest local stressors. Excess nitrogen fuels algae growth that smothers coral colonies, while fine sediment clouds the water and blocks the sunlight corals need to survive. The Reef 2050 Water Quality Improvement Plan set targets of a 60 percent reduction in dissolved inorganic nitrogen and a 25 percent reduction in fine sediment reaching the reef from catchment areas by 2025.
Meeting those targets depends on changing farming practices across Queensland’s coastal catchments. That means better management of fertilizer application, improved ground cover to prevent soil erosion, and restoration of wetlands that naturally filter runoff before it reaches the coast. Progress has been slow in some catchments, but the targets remain central to the government’s strategy because cleaner water makes corals more resilient to heat stress. A coral struggling with poor water quality is far more likely to die during a bleaching event than one living in clean, clear water.
Controlling Crown-of-Thorns Starfish
Crown-of-thorns starfish are native to the reef, but periodic population explosions turn them into one of its most destructive forces. A single starfish can consume up to 10 square meters of coral per year, and outbreaks involving millions of individuals can devastate entire reef sections. These outbreaks are partly linked to nutrient runoff, which boosts the plankton that starfish larvae feed on.
The current control program relies on divers injecting individual starfish with a solution that kills them. Modeling suggests the most effective strategy is to concentrate culling effort in a targeted area rather than spreading it thinly across the entire reef. Removing 100% of adult starfish from a focused 1,737 square kilometer zone could increase total coral cover across the reef by 175 square kilometers over a century, compared to no control. Spreading the same budget across all 1,705 reefs, culling only about 12% at each, yields less than half that benefit. In practice, funding only supports control on a few hundred reefs in any given year, so strategic targeting is essential.
Growing New Coral
Scientists are developing techniques to speed up coral recovery by growing coral larvae or fragments in labs and seeding them onto damaged reefs. The concept is promising, but survival rates remain a major challenge. Less than 30% of lab-reared coral typically survives its first year on a reef, primarily because fish graze on the tiny new colonies before they can establish themselves.
Recent field trials have tested devices designed to shield young corals from fish predation. Devices with fish-exclusion features doubled coral survival rates compared to unprotected controls, where most corals died within 48 hours of being placed on the reef. Researchers also found that coral microfragments (small pieces cut from adult colonies) survived better than newly settled larvae, and corals attached to side-facing surfaces fared better than those facing upward, likely because they were less visible to grazing fish. These are still small-scale experiments, but they’re refining techniques that could eventually work at a meaningful scale.
Indigenous Management of Sea Country
Aboriginal and Torres Strait Islander peoples have managed the reef and its surrounding waters for thousands of years. Today, more than 43 percent of the Marine Park coastline is managed under Traditional Use of Marine Resources Agreements. These are community-based plans, accredited in legislation, that guide how Traditional Owners manage resources in their sea country.
These agreements have proven to be a successful mechanism for joint management. They integrate ecological knowledge that predates European settlement with modern conservation science, covering everything from sustainable fishing practices to monitoring of reef health. The Reef 2050 Plan explicitly aims to expand this approach, supporting Traditional Owners in continuing to manage sea country and incorporating Indigenous heritage into all facets of reef decision-making.
What You Can Do
The single most impactful thing any individual can do for the reef is reduce their carbon footprint, because climate change is the threat that dwarfs all others. That means the familiar steps: reducing energy consumption, choosing lower-emission transport, supporting renewable energy, and voting for political candidates who take emissions reduction seriously. These actions feel distant from a coral reef, but they’re directly connected to whether ocean temperatures stay within the narrow range corals can tolerate.
If you visit the reef, choose a tour operator certified through the High Standard Tourism Operator program. These operators are independently certified by Ecotourism Australia or EarthCheck, meaning they meet specific environmental standards for how they interact with the marine park. Your tourism dollars also matter politically. The reef generates billions in economic activity, and a thriving tourism industry strengthens the financial case for protection.
You can also contribute data. The Great Barrier Reef Marine Park Authority runs the Eye on the Reef program, which allows anyone visiting the reef to record observations about reef health, marine animal sightings, and any incidents or impacts they notice. The app provides access to zoning maps and survey methods suited to everyone from first-time snorkelers to trained marine professionals. This citizen science data feeds directly into management decisions.
For those not visiting Australia anytime soon, supporting organizations that fund reef science, lobbying for stronger climate policy, and simply staying informed all contribute. The reef’s future will be decided in the next two decades, largely by whether the world holds warming closer to 1.5°C or lets it drift toward 2°C. That’s not just an Australian problem. It’s a global one, and every country’s emissions trajectory plays a role.