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coral bleaching
'Graveyard of Corals': Bleaching Led to Great Barrier Reef's Worst Die-Off on Record
"We will ultimately get to a tipping point where coral cover can't bounce back," warned one researcher. "We have to mitigate the root causes of the problem and reduce emissions and stabilize temperatures."
Aug 06, 2025
After last year's climate-fueled bleaching in Australia's famed Great Barrier Reef, large swaths of the GBR suffered the worst coral die-off since records began, a government report revealed Wednesday, prompting renewed calls for reducing greenhouse gas emissions as well as reef conservation and restoration.
The GBR "experienced unprecedented levels of heat stress, which caused the most spatially extensive and severe bleaching recorded to date," the Australian Institute of Marine Science's (AIMS) annual report states.
AIMS studied the health of 124 coral reefs between August 2024 and May 2025 and found that northern and southern branches of the approximately 1,400-mile (2,300 km) GBR suffered the "largest annual decline in coral cover" ever recorded since monitoring began nearly 40 years ago.
Data collected last year from aerial surveys showed that 75% of the GBR had been bleached amid record heat driven by the worsening climate emergency. The U.S. National Oceanic and Atmospheric Administration warned in March 2024 that the bleaching would likely be the worst the world had ever seen.
The new report confirmed that "the 2024 event had the largest spatial footprint ever recorded on the GBR, with high to extreme bleaching prevalence observed across all three regions" of the GBR.
According to AIMS:
In 2025, hard coral cover declined substantially across the GBR, although considerable coral cover remains in all three regions. Regional declines ranged between 14% and 30% compared to 2024 levels, with some individual reefs experiencing coral declines of up to 70.8%. These declines are primarily attributed to coral mortality from the 2024 mass coral bleaching event, compounded by the cumulative impacts of two cyclones in December 2023 and January 2024, freshwater inundation, and some crown-of-thorns starfish activity.
In 2025, 48% of surveyed reefs underwent a decline in percentage coral cover, 42% showed no net change, and only 10% had an increase. Reefs with stable or increasing coral cover were predominantly located in the central GBR.
Scientists described the resulting seascape as a "graveyard of corals."
AIMS research lead Mike Emslie told Agence France-Presse that the "number one cause" of GBR coral decline "is climate change."
"There is no doubt about that," Emslie added.
The problem is by no means limited to the GBR. A mass global bleaching event has devastated more than 80% of the world's coral reefs over the past two years, affecting 82 countries and territories.
Prior to the current die-off, the last major GBR bleaching event occurred in 2014-17, when scientists said nearly one-third of its coral died and approximately 15% of all reefs worldwide experienced major coral deaths.
"These impacts we are seeing are serious and substantial and the bleaching events are coming closer and closer together," Emslie said in a separate interview with The Guardian.
"We will ultimately get to a tipping point where coral cover can't bounce back because disturbances come so quickly that there's no time left for recovery," he warned. "We have to mitigate the root causes of the problem and reduce emissions and stabilize temperatures."
AIMS called for greater global efforts to reduce the greenhouse gas emissions fueling planetary heating, "continued good local management," and more interventions "to help corals adapt and recover."
Larissa Waters, leader of the Australian Greens and a federal senator representing Queensland, on Monday urged the governing Labor Party to "follow the science, set 2035 targets at net-zero, stop new coal and gas, or risk losing our reef, its immense biodiversity, and the 60,000 jobs it sustains."
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Want to Protect Coral Reefs? Recognize the Rights of Nature
The escalating coral bleaching crisis must serve as a call to action, not just for environmental protection, but for a transformative shift in how we view and relate to Nature.
Nov 12, 2024
Amid the most widespread coral reef bleaching ever recorded, we face a crucial question: How can we implement effective, holistic protections for coral reefs?
For over 30 years, governments and civil society have gathered at United Nations Climate Change Conferences, yet the results have often been superficial and ineffective. Despite scientists’ urgent warnings about the devastating effects of warming beyond 1.5°C, proposed mitigation targets remain unmet, and accountability is absent due to non-binding agreements. Climate policies have largely centered on humanity’s needs in the name of development and economic growth, neglecting the equally vital futures of other species. This oversight has led to repeated failures for Nature, contributing to today’s largest recorded coral bleaching event across 74 countries. Now, scientists warn that even 1.5°C may be too much for coral and ocean health.
News headlines keep warning us of a point of no return, calling attention to fires in the Amazon and yet another massive coral bleaching event. This may seem distant from our daily lives, but the truth is that the problem is closer than we realize—and solutions lie within each of us. Recognizing the inherent Rights of Nature is one such solution.
What Are the Rights of Nature?
Recognizing and respecting Nature’s rights holds the potential to change humanity's relationship with our planet. The Rights of Nature movement traces its roots to Christopher Stone’s 1972 book Should Trees Have Standing? Since then, countless scholars, scientists, and activists have joined the call to recognize Nature’s inherent rights and our responsibility to all other beings with whom we are interconnected.
The Rights of Nature is now a powerful global movement aiming to transform human consciousness, redesign unsustainable economic and social systems, and provide a framework for living in harmony with Nature. Drawing on the wisdom of ancient and Indigenous cultures and leveraging modern law, the movement seeks a balanced relationship between humankind and all forms of life, honoring the natural equilibrium of our biosphere.
Recognizing the rights of corals ensures a holistic approach to ocean protection, safeguarding these crucial ecosystems so they can continue to exist, persist, and regenerate their life-sustaining cycles.
Recognizing the inherent Rights of Nature to protect the future of coral reefs provides a real and holistic solution not only to corals but to the well-being of all species that live among them. The escalating coral bleaching crisis must serve as a call to action, not just for environmental protection, but for a transformative shift in how we view and relate to Nature. By recognizing coral reefs as living entities with inherent rights through the Rights of Nature framework, we move beyond traditional conservation approaches. This holistic lens not only restores and protects coral ecosystems but also elevates the voices and rights of Indigenous communities, whose knowledge and stewardship are vital to these ecosystems’ survival. Granting legal rights to reefs ensures their protection from exploitation and destruction while fostering a deeper respect for the interconnectedness of all life. It’s a crucial step toward securing the future of coral reefs and the communities that depend on them.
Have Coral Reefs Been Granted Rights Around the World?
The Rights of Nature movement allows for a flexible approach, enabling creative implementation tailored to different environments and legal systems. In Ecuador, these rights were embedded in the Constitution in 2008, while Panama established them as National Law (Law 287) in 2022. Various initiatives and campaigns for Ocean Rights, encompassing diverse marine ecosystems, are underway—a majority of them featured in the EcoJurisprudence Monitor.
Just this past September, the Rights of Nature movement had a big win led by the Leatherback Project and local entities when Panama adopted the Saboga Wildlife Refuge under Resolution N° DM-0361-2024, protecting critical sea turtle habitat and recognizing corals’ rights to regenerate their vital cycles. The resolution proposes to “promote the protection of the Rights of Nature, enshrined in Law 287 of 2022, ensuring that the ecosystems within the Saboga Wildlife Refuge are treated as subjects of rights, with the aim of preserving their integrity, regeneration, and ecological balance.” Additionally, the law recognizes the rights of corals to regenerate under this specific clause: “Promote the protection, conservation, and restoration of coral reefs and seagrass meadows, recognizing their importance as critical habitats for marine biodiversity and as fundamental components for the ecological health of the protected area and its resilience to climate change.” The protection of the Saboga Wildlife Refuge will require Panama’s action even beyond the borders of the reserve, as upholding coral and sea turtles' rights will not depend only on what happens inside protected areas.
Who Can Benefit From Corals Having Their Rights Recognized?
Listing coral reefs’ contributions to a healthy ocean could go on endlessly. Thriving coral reefs support thriving ocean life, provide essential nurseries for marine species, and offer reliable food sources. Recognizing the rights of corals ensures a holistic approach to ocean protection, safeguarding these crucial ecosystems so they can continue to exist, persist, and regenerate their life-sustaining cycles. As scientists warn, rising ocean temperatures are damaging coral reefs, making urgent action essential. Oceans know no borders, and governments must implement bold climate mitigation measures to halt and reverse ecosystem degradation. Recognizing Nature’s rights offers an effective and bold solution to achieving this goal. In summary, all benefit from coral reefs having their rights recognized.
How the Rights of Nature Are Being Used Around the World
From Antarctica to the Amazon rainforest to rivers in Bangladesh, the Rights of Nature movement is working to holistically protect vital ecosystems through principles rooted in ancient wisdom and the undoubted connection between humans and Nature. We need to restore our connection to Mother Earth and act boldly for the implementation of real, effective solutions to the polycrises we are facing today. The Rights of Nature movement offers hope for future generations, both human and non-human.
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Highest Ocean Heat in 400 Years Poses 'Existential Threat' to Great Barrier Reef
"In the absence of rapid, coordinated, and ambitious global action to combat climate change, we will likely be witness to the demise of one of Earth's great natural wonders," the authors of a study in Science wrote.
Aug 08, 2024
The Great Barrier Reef recently experienced the highest ocean temperatures in at least four centuries and faces an "existential threat" due to repeated mass coral bleaching episodes, a study published Wednesday in Science found.
The network of coral reefs off of Australia—the world's largest living structure—has faced five of the six hottest three-month periods of average surface temperature ever recorded just since 2016, each of which was accompanied by devastating coral bleaching.
Ocean temperatures around the reef reached a record-breaking extreme from January to March this year, with the three-month mean temperature 1.73°C higher than the pre-1900 average, according to the study, authored by researchers based in Australia.
The study includes climate modeling that attributes the temperatures to fossil fuel-driven carbon emissions, and concludes that urgent climate action is needed.
"This attribution, together with the recent ocean temperature extremes, post-1900 warming trend, and observed mass coral bleaching, shows that the existential threat to the Great Barrier Reef ecosystem from anthropogenic climate change is now realized," the study says.
"In the absence of rapid, coordinated, and ambitious global action to combat climate change, we will likely be witness to the demise of one of Earth's great natural wonders," the authors also wrote.
The Great Barrier Reef is under critical pressure, with warming sea temperatures and mass coral bleaching events threatening to destroy the remarkable ecology, biodiversity, and beauty of the world’s largest coral reef, according to research in @nature. https://t.co/67bXgmfTEn
— Robin Hicks (@RobinHicks_) August 8, 2024
The researchers estimated the surface temperatures for 1618-1899 by using a reconstruction method based on drilling into coral skeletons and analyzing the chemical makeup. For the period from 1900 to 1995, they used both the reconstruction method and measurements by modern instruments, and for the last 30 years they used instrumental data.
They found that temperatures were relatively stable until 1900 but have climbed steadily since, especially since 1960.
The trend has culminated in a series of bleaching events, in which stressed corals expel the microscopic algae in their tissues and become transparent or white. Without the helpful algae, which live inside them symbiotically, corals are at risk of disease and death.
In interviews with journalists, the study authors spoke about the severity of the threat to the Great Barrier Reef and the urgent need for climate action.
"The heat extremes are occurring too often for those corals to effectively adapt and evolve," Ben Henley, a paleoclimatologist at the University of Melbourne and lead author of the study, told The New York Times. "If we don't divert from our current course, our generation will likely witness the demise of one of Earth's great natural wonders, the Great Barrier Reef."
Henley said he snorkeled with his father on the Great Barrier Reef as a child.
"You can't even take in the diversity," he said. "It's a kaleidoscope of color, it's absolutely spectacular."
He said he worries that his own 2-year-old daughter may not be able to enjoy the same experience.
"In her childhood years the reef is likely to see immense destruction," he said.
He called for strong global action so that his daughter and members of her generation could "marvel at the reef in their lifetimes."
Helen McGregor, a scientist at the University of Wollongong and study co-author, told the BBC the new research "could send a huge signal to the world about how grave the problem is."
"We know what we need to do," she added. "We have international agreements in place [to limit global temperature rise]."
Scientists not involved in the study agreed about the importance of the research, not just for the Great Barrier Reef but for coral reefs more generally.
"It's a stunningly important summary of the history of the world's largest reef system," Stephen Palumbi, a marine biologist at Stanford University, told the Times. "The paper lays out the danger that corals all around the world face from this heat."
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