Environment & Energy

OKIsItJustMe

(21,647 posts)

2. Substantial impacts from 2024 mass coral bleaching and cyclones reduce regional coral cover to near long-term average

Reply to hatrack (Original post)

Tue Aug 5, 2025, 11:34 PM

Aug 5

OK, now we’re talking Science!

https://www.aims.gov.au/monitoring-great-barrier-reef/gbr-condition-summary-2024-25

Long-Term Monitoring Program
Annual Summary Report of Coral Reef Condition 2024/2025
Substantial impacts from 2024 mass coral bleaching and cyclones reduce regional coral cover to near long-term average
6th August 2025

Executive summary

…
The 2024 mass coral bleaching event was the fifth mass coral bleaching event on the GBR since 2016 and was part of an ongoing (fourth) global event that began on Northern Hemisphere reefs in 2023 and was declared by the National Oceanic and Atmospheric Association (NOAA) and the International Coral Reef Initiative (ICRI) in April 2024.
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.
To assess the impact of the 2024 bleaching event, targeted in-water surveys during and after peak bleaching were carried out in addition to LTMP manta tow surveys. Results from both sets of surveys indicate substantial coral mortality, and that decline in coral cover directly relates to coral bleaching severity and the prevalence of high to extreme coral bleaching (>30% coral cover bleached).
Fast-growing Acropora corals, which facilitated the rapid recovery observed across many reefs between 2017 and 2024, were among the most severely impacted by the bleaching event.
…

https://theconversation.com/worlds-biggest-coral-survey-confirms-sharp-decline-in-great-barrier-reef-after-heatwave-260563

World’s biggest coral survey confirms sharp decline in Great Barrier Reef after heatwave
Published: August 5, 2025 4:05pm EDT

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Highlight:

Annual Loss Of Coral Cover Across Great Barrier Reef Worst In 40 Years; 25% Mortality In North, 40% At One Tree Island [View all] hatrack Aug 5 OP

Reuters: Australia's Great Barrier Reef suffers record coral decline following mass bleaching OKIsItJustMe Aug 5 #1

Substantial impacts from 2024 mass coral bleaching and cyclones reduce regional coral cover to near long-term average OKIsItJustMe Aug 5 #2

Cool jfz9580m Aug 6 #3

A half century later (and still counting) Pogo still stands up OKIsItJustMe Aug 6 #4

Thanks for the tip jfz9580m Aug 11 #5