Protect the Great Barrier Reef from the impacts of climate change

CLIMATE BRIEFING
The Great Barrier Reef is the largest coral reef system in the world, and is an iconic natural landmark of Australia. However, this incredible ecosystem is at huge risk to due to climate change. Australia must act to preserve this unique site, and all the benefits it brings to our community.
This climate briefing is part of our series of simple, easy-to-follow guides and email templates on big climate topics for Australia. They’re designed to help you get across the issues, feel more confident speaking up, and make it easy to send a message to your MP about the things you care about.

Background and context:

The Great Barrier Reef is an iconic Australian natural feature, World Heritage Site, unique ecosystem, and significant source of jobs in tourism and fisheries. In 2015, the government released the Reef 2050 Long-Term Sustainability Plan, yet little action has been taken since ratification of the document. In 2024, ocean temperatures reached 400 year highs, risking permanent damage to the reef as a result of climate change. Emissions must be curbed immediately to prevent catastrophic loss to the coral reefs and the biodiverse lifeforms that depend on it. 

Background/Context

  • Climate change is directly impacting sea and air temperatures, ocean acidification, extreme weather events and changing currents.
  • Oceans are important carbon dioxide sinks, having absorbed 39% of all human emissions since the mid-eighteenth century.
  • Coral creates the basis for many other species on the reef. It also acts as a barrier protecting shorelines from dangerous storms and waves.
  • Rising sea temperatures cause coral bleaching and heat stress which jeopardise both the coral’s survival and ocean biodiversity. Coral is highly sensitive to incremental changes in ocean temperature and prolonged periods of higher water temperatures causes coral mortality. 
  • The Great Barrier Reef has experienced 5 mass bleaching events in 8 years, with the summer of 2023/24 being the most extensive on record
  • Because the reef is so sensitive to changes in ocean temperature, the most important thing we can do to protect the reef is to act on climate change. 
  • An improved federal EPBC Act is also critical to help protect the reef. You can read our issue briefing on this topic here

Why is it important?

  • The Great Barrier Reef is one of the largest and most biodiverse regions on Earth. An enormous array of organisms depends on healthy coral for food and habitat. 
  • Coral reefs are immensely sensitive to incremental changes in water temperature, making them especially vulnerable to the effects of climate change. 
  • To provide the reef with a greater chance at recovering from future bleaching events, efforts have been made to improve water quality and minimise chemicals and fertilisers from entering the reef’s water. We must push for stronger policies now, to prevent catastrophic damage to our reef.

Who to contact:

Further Reading

CLICK HERE TO LOG YOUR CONTACT WITH MPs

Actions:

1. Email your MP or relevant Ministers

If you need some help getting started with your email, here is an example. 

Please don’t copy it exactly - personalise it and tailor it to the MP you are writing to. 

In addition, when writing to a Minister or Shadow Minister, start by saying that you’re writing to them in their role as Minister for xxxx, otherwise they will probably just forward your email to your local MP.

[MP name]

[Member for …. or  Minister for ….]

Dear …

[personal first sentence - who you are, why you care] 

I am extremely concerned about the direct effects climate change is causing to the Great Barrier Reef and the coral within it. The reef is home to an enormous array of biodiversity that relies on healthy coral for habitat, food and survival. As oceans warm, corals are increasingly experiencing bleaching, which jeopardises its survival. 

The Great Barrier Reef has experienced 5 mass bleaching events in 8 years and as climate change worsens, so will the bleaching events. 

To ensure the survival of the Great Barrier Reef, we need stronger policies to protect the area from pollution and move away from fossil fuels. We need to commit to net-zero emissions by 2050, or the reef will suffer greatly as a consequence. 

Will you pause all fossil fuel projects until the new Environment Act is legislated, to protect the Great Barrier Reef?

Will you fulfil your campaign promise and urgently pass the new Environment Act?

I look forward to your response.

Sincerely

Name

Address

Phone 

(Note: your contact details are required if you want a reply)

2. Call your MP

Here is a suggested script to get you started:

Hi, my name is ….. and I’m a voter in [your electorate].

I’d like to speak to …..[name of MP]

(Staffer will probably say: I’m sorry they’re not available, can I take a message?)

Yes, thank you! Would you please tell them/pass on my message…

  • I am extremely concerned about the direct effects climate change is causing to the Great Barrier Reef and the coral within it
  • Any personal reasons why you care about the Great Barrier Reef

And ask them to …. 

  • Pause all fossil fuel projects until the new Environment Act is legislated, to protect the Great Barrier Reef?

  • Urgently pass the new Environment Act?

Thank you!

3. Visit your MP

Nothing beats a face-to-face conversation. Email your MP’s electorate office to ask for a meeting and follow up with a phone call a few days later. Get help on how to do this under the Democracy and Governance heading on our Climate briefings webpage.

(Last updated April 2025)

 

 Science says:

HOW WILL HOTTER OCEANS AFFECT MARINE LIFE?

Warming oceans impact marine life

Warmer oceans caused by climate change are having a serious impact on marine ecosystems: they alter ocean habitats, shift migration patterns, and reduce food availability for many species. One of the most visible and damaging effects is the mass bleaching of coral reefs, which occurs when coral expel the algae they rely on for energy when due to heat stress. Warmer waters also disrupt the timing of breeding and feeding seasons, leading to mismatches in food chains. As species move to cooler waters to survive, competition increases between local and migrating species, threatening biodiversity and the health of entire marine ecosystems.

Aboriginal flag Torres Strait Islander flag

We acknowledge the Traditional Custodians of Country throughout Australia, whose sovereignty was never ceded. We acknowledge that Indigenous peoples around the world are at the forefront of climate change, both in experiencing its effects and leading solutions for change. We pay our sincerest respects to all Elders, past and present.