Scientists discover the first evidence that marine conservation helps to reduce climate change. Marine protected areas act as a safeguard for oceans, seas, and estuaries. These regions help in the preservation of the plants and animals that are native to these waters, but the advantages of protecte
Climate change refers to long-term changes in temperature and weather patterns and has become a matter of increasing concern.Marine protected areas act as a safeguard for oceans, seas, and estuaries. These regions help in the preservation of the plants and animals that are native to these waters, but the advantages of protected areas go well beyond their boundaries.
The scientists discovered that carbon sequestration increased significantly in marine-protected seagrass areas, mangroves, and regions where sediment was not trawled. “Partial or full degradation of mangroves and seagrass both resulted in similar decreases of sequestered carbon, indicating that even low levels of human impact result in important carbon emissions,” they write.
In addition to boosting carbon sequestration, preserved areas were more biodiverse, had increased species richness, and showed benefits for humans, too. Marine-protected areas had greater food security, and fish stocks in waters adjacent to these protected areas swelled. The authors note that the mitigation and adaptation benefits of these protected areas were only achieved under high levels of protection and that benefits increased the longer an area had been protected.
“Across all four pathways analyzed, only full and high levels of protection resulted in mitigation or adaptation benefits,” they write. “In contrast, low levels of protection generated no benefits. Furthermore, increases in species richness and in fishers’ income only occurred for fully protected areas, where no fishing is allowed.”
Reference: “Ocean conservation boosts climate change mitigation and adaptation” by Juliette Jacquemont, Robert Blasiak, Chloé Le Cam, Maël Le Gouellec and Joachim Claudet, 21 October 2022,
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