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Rising temperatures on the coast of California have killed more oysters over 15 years.
"For the first time since I started working, I've seen oysters in burnt shells," said Jake Sons, research coordinator at a marine reserve in Bogida Bay.
"The oysters are cooked inside the snails because of the temperature rise of 37 degrees Celsius, and this happened at the same time at the level of several beaches on the same coast, which is 225 kilometers."
The oyster is the main species in its ecosystem, and the effect of the heat is not only on oysters, but also on other species that cause changes throughout the California coast, he said, adding that extinction has become more recent.
Bryan Helmuth, a marine ecologist at Northeastern University in Boston, has created a mussel robot that can record the temperatures that are affected by mollusks.
In 1004, a similar large extinction of oysters was recorded by Christopher Harley, a biologist at the University of Canada, but Sons confirmed that the 2019 event on the California coast was even greater.
In June, the United Nations said the year 2019 would be unusually hot, while scientists warned that rising temperatures could lead to the deaths of thousands of people.
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