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Last Update: 10/26/2026 at 11:33 PM EST
Climate Change and Coral Reefs
Coverage from bioRxiv, PR Newswire, and others
Coral reefs are shaped by the interaction between rising ocean temperatures, marine heatwaves, local stressors, and the ecological relationships that support recovery.
Heat stress can cause corals to expel their symbiotic algae, leading to bleaching, disease, and mortality, while resilient sites such as Houtman Abrolhos and Palmyra Atoll offer clues for protection and restoration. Researchers and conservation groups are testing nurseries, heat-tolerant corals, assisted evolution, symbiont research, and reef management in places including the Marshall Islands, Fiji, Australia, and Florida. These interventions can protect particular reefs, but long-term reef persistence also depends on limiting global warming and reducing local pressures.
Looking Back
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All Articles46 articles
Important
Researchers found that human-caused climate change drove 99% of substantial coral bleaching events across 4,479 global monitoring sites between 1985 and 2024.
9/12/2026 • Climate Science & Impacts • General
Oceanography research attributes nearly all global coral bleaching events over 40 years to human-driven ocean warming, projecting broad bleaching during 2026-2027 El Niño.
7/23/2026 • Climate Science & Impacts • General
Researchers reconstructed monthly sea temperatures and rainfall at Jiigurru from a giant clam that lived there between about 1785 and 1827.
9/28/2026 • Climate Science & Impacts • General
Australian Institute of Marine Science reported partial coral-cover recovery across northern and central Great Barrier Reef regions in 2026, despite recurring bleaching and marine heatwaves.
8/10/2026 • Climate Science & Impacts • General
Indonesia coral reef monitoring from 2004 to 2023 shows stable hard coral cover until thermal stress exceeds about 12 degree-heating weeks.
6/8/2026 • Climate Science & Impacts • General
The Global Coral Reef Monitoring Network reported in its 2025 assessment that hard coral cover declined globally as climate-driven marine heat waves intensified across reefs worldwide.
9/9/2026 • Climate Science & Impacts • General
Researchers from Hawaii and European universities projected that climate-driven reef decline could cost Hawaii residents $1.8 billion to $3 billion in recreational losses by 2100.
7/6/2026 • Climate Science & Impacts • General
Researchers analyzing global reef surveys report that marine heatwaves from 2014 to 2017 caused unprecedented, widespread coral bleaching and mortality across tropical oceans worldwide.
2/18/2026 • Climate Science & Impacts • General
In 2023, marine scientists at Palmyra Atoll documented prolonged heat stress and varied coral recovery, informing restoration strategies in Florida, Puerto Rico, Maui, and Belize.
9/24/2026 • Adaptation & Resilience • General
Andrew Baker and The Florida Aquarium outplanted Flonduran elkhorn corals in Dry Tortugas in spring to test heat tolerance after Florida's 2023 marine heatwave.
5/29/2026 • Adaptation & Resilience • General
WCS and Macquarie University mapped climate-resilient coral reefs through 2050 using 45,000 surveys and 42 indicators to support conservation planning.
6/21/2026 • Climate Science & Impacts • General
Researchers in Australia evaluate crayweed cryopreservation and Operation Crayweed restoration to protect seaweed genetic diversity as marine heatwaves intensify.
6/28/2026 • Climate Science & Impacts • General
NOAA data show bleaching-level heat stress affected almost 85% of global coral reef area from 2023 to 2025 as restoration programs in Fiji focus on heat-tolerant corals.
5/5/2026 • Climate Science & Impacts • General
Journal of Applied Ecology research models 850 coral reefs (2011-2024) and finds reef-hub connectivity, including Coral Sea links, is critical under 1 C to 4 C ocean warming.
4/21/2026 • Climate Science & Impacts • General
The Global Coral Reef Monitoring Network reported in the 2020s that increasingly frequent bleaching is preventing coral recovery across reefs worldwide, with the Pacific Islands also confronting related ocean-health risks.
8/31/2026 • Climate Science & Impacts • General
Ceccarelli et al. reported in 2026 that four decades of monitoring found stable overall coral cover across Australia's Great Barrier Reef.
8/18/2026 • Climate Science & Impacts • General
University of Hawaiʻi researchers project 1.8 to 3.0 billion dollars in Hawaiʻi coral reef recreation welfare losses by 2100, with larger per-person burdens for disadvantaged communities.
7/2/2026 • Climate Science & Impacts • General
Wildlife Conservation Society and Macquarie University researchers presented an AI-based study in Mombasa, Kenya, estimating one-third of coral reef area may be climate-resilient by 2050 under high emissions.
6/25/2026 • Climate Science & Impacts • General
Wildlife Conservation Society researchers identified nearly 166,000 sq km of climate-resilient coral reefs across 71 countries using 45,000 surveys and decades of climate data.
6/20/2026 • Climate Science & Impacts • General
Wildlife Conservation Society and Macquarie University mapped climate-resilient coral reef habitat in 71 countries during work informed by 2023 to 2025 El Nino bleaching.
6/17/2026 • Climate Science & Impacts • General
NOAA warned in 2026 that El Niño-associated ocean warming could drive mass coral bleaching risks between June and September across northern Pacific reefs including Hawaii, with possible impacts for Florida and the Caribbean.
6/3/2026 • Climate Science & Impacts • General
Tropical Research and Conservation Center expands modular concrete and 3D-printed artificial reefs near Pom Pom Island, Malaysia, to support coral recovery after dynamite fishing and bleaching.
5/24/2026 • Climate Science & Impacts • General
Benjamin Moshirian and NOAA researchers advance automated coral restoration and heat-tolerance screening as 2023 mass bleaching damages reefs near Isla Grande, Colombia.
4/23/2026 • Markets & Industry & Innovation • General
Divers and researchers reported worsening soft coral collapse near Jeju Island, South Korea, in 2025 as prolonged marine heatwaves and severe weather damaged habitat and fisheries.
9/7/2026 • Climate Science & Impacts • General
Wildlife Conservation Society and Macquarie University presented 50 Reefs+ in Kenya, estimating more than 64,000 square miles of coral reefs may remain resilient to future warming.
6/16/2026 • Climate Science & Impacts • General
Researchers document a Moorea, French Polynesia reef recovery failure after the 2019 bleaching event linked to internal microbial hollowing and algal stabilization.
6/1/2026 • Climate Science & Impacts • General
Researchers based in Perth surveyed Houtman Abrolhos corals in July 2025, finding heat tolerance during a 2025 marine heatwave despite widespread bleaching elsewhere.
4/27/2026 • Climate Science & Impacts • General
Researchers in Kiritimati tracked Platygyra ryukyuensis symbionts over 2014-2023 and found incomplete recovery nearly eight years after the 2015-2016 El Nino heatwave.
3/1/2026 • Climate Science & Impacts • General
Researchers warn that U.S. policy tweaks may erode coral habitat protections in Guam amid executive orders and NOAA rule changes in 2025.
2/26/2026 • Climate Science & Impacts • General
Interesting
Researchers use AI to map coral reef climate refugia across countries and territories, presenting June 16 results at the Our Ocean Conference in Mombasa, Kenya.
6/22/2026 • Adaptation & Resilience • General
A research roadmap outlines how assisted evolution could be scaled to improve coral thermal tolerance as marine heatwaves intensify.
3/29/2026 • Adaptation & Resilience • General
Vox reports on Australias efforts to restore the Great Barrier Reef and address climate threats without discussing any heat pump technologies or related policies.
1/21/2026 • Adaptation & Resilience • General
Anne Cohen and partners identify heat-resilient coral reefs near Laura in Majuro lagoon, Marshall Islands, using models and robotic surveys to inform super reef restoration corridors.
6/14/2026 • Adaptation & Resilience • General
University of Hawaii researchers found in 2025 that zooplankton availability helps determine reef manta aggregation size at Garden Eel Cove and Keauhou near Kona, Hawaii.
8/17/2026 • Climate Science & Impacts • General
UNESCO cited Australias management actions in 2026 while warning that 2024-2025 mass bleaching reduced Great Barrier Reef coral resilience.
7/4/2026 • Climate Science & Impacts • General
Ocean warming is linked to more frequent coral bleaching events, heightening biodiversity and coastal protection risks while restoration efforts focus on resilient corals.
5/22/2026 • Climate Science & Impacts • General
Scientists report newly documented deep-sea coral reefs inside Ecuador's Galápagos Marine Reserve, tying past coral loss to La Niña-driven circulation and lower oxygen at depth.
5/3/2026 • Climate Science & Impacts • General
USF researchers led by Cynthia Lewis prepare coral relocation and expanded Keys Marine Laboratory seawater tables in Florida ahead of a hot El Niño threat after 2023 bleaching.
7/16/2026 • Climate Science & Impacts • General
UNESCO draft findings released in Paris kept Australia’s Great Barrier Reef World Heritage status after 2024-2025 mass coral bleaching tied to climate-driven ocean heat.
7/4/2026 • Climate Science & Impacts • General
Researchers and Anindilyakwa Land & Sea Rangers documented coral bleaching and limited coral diversity at five previously understudied reef sites around Groote Eylandt in Australia's Gulf of Carpentaria in February 2024.
8/12/2026 • Climate Science & Impacts • General
Researchers and the Alligator Head Foundation are testing solar-powered underwater soundscapes to restore marine life on a degraded coral reef off northern Jamaica after severe Caribbean heat damage.
5/11/2026 • Climate Science & Impacts • General
From 2016 to 2018, Luiz Rocha and colleagues deployed standardized reef-monitoring structures in Palau, Guam, the Marshall Islands, and French Polynesia to assess deep-reef biodiversity and climate vulnerability.
9/1/2026 • Climate Science & Impacts • General
University of Queensland and Australian Institute of Marine Science researchers map Great Barrier Reef microbial communities from seawater DNA across 48 reefs using metagenomics.
7/22/2026 • Climate Science & Impacts • General
Australia, led by assistant tourism minister Nita Green, welcomed a UNESCO decision in 2026 not to list the Great Barrier Reef as endangered despite mass coral bleaching risks.
7/4/2026 • Climate Science & Impacts • General
Woods Hole scientists are investigating heat-resilient coral reefs in the Marshall Islands to improve conservation and restoration as ocean warming accelerates.
6/21/2026 • Climate Science & Impacts • General
Additional
COREB and National Geographic teams located a previously unconfirmed deep mesophotic coral ecosystem off Benin during a 2025 sonar and camera survey.
7/20/2026 • Climate Science & Impacts • General