地理漫步·世界地理英语30篇（3）
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The Great Barrier Reef: A Living Archive of Climate Change
大堡礁：气候变化的活体档案
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Stretching over 2,300 kilometers, the Great Barrier Reef is the world’s largest coral structure—and visible from space.
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Corals build limestone skeletons over millennia, creating layered records of past ocean temperatures and acidity levels.
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Mass bleaching events since 2016 have damaged two-thirds of shallow-water reefs, mainly due to marine heatwaves.
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Indigenous Australian rangers monitor reef health using drones and traditional ecological knowledge of fish migration patterns.
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Restoration projects now transplant heat-tolerant coral fragments grown in labs onto degraded sections of reef.
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Runoff from sugarcane farms carries nutrients that fuel algal blooms, smothering young corals and blocking sunlight.
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Australia’s Reef 2050 Plan includes stricter water quality targets and bans on dumping dredge spoil near sensitive zones.
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Citizen scientists log sightings via apps, helping researchers map recovery rates after cyclones and crown-of-thorns outbreaks.