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World’s ‘oldest’ tree able to reveal planet’s secrets

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Detail of the "Alerce Milenario" at the Alerce Costero National Park in Valdivia, Chile. Photo by MARTIN BERNETTI / AFP)
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In a forest in southern Chile, a giant tree has survived for thousands of years and is in the process of being recognised as the oldest in the world.

Known as the “Great Grandfather,” the trunk of this tree measuring four meters (13 feet) in diameter and 28 meters tall is also believed to contain scientific information that could shed light on how the planet has adapted to climatic changes.

Believed to be more than 5,000 years old, it is on the brink of replacing Methuselah, a 4,850-year-old Great Basin bristlecone pine found in California in the United States, as the oldest tree on the planet.

“It’s a survivor, there are no others that have had the opportunity to live so long,” said Antonio Lara, a researcher at Austral University and Chile’s center for climate science and resilience, who is part of the team measuring the tree’s age.

The Great Grandfather lies on the edge of a ravine in a forest in the southern Los Rios region, 800 kilometers (500 miles) to the south of the capital Santiago.

It is a Fitzroya cupressoides, a type of cypress tree that is endemic to the south of the continent.
In recent years, tourists have walked an hour through the forest to the spot to be photographed beside the new “oldest tree in the world.”

– ‘Symbol of resistance’ –
This is about more than just a competition to enter the record books though, as the Great Grandfather is a font of valuable information.

“There are many other reasons that give value and sense to this tree and the need to protect it,” said Lara.
There are very few thousands-years-old trees on the planet.

“The ancient trees have genes and a very special history because they are symbols of resistance and adaptation. They are nature’s best athletes,” said Barichivich.

“They are like an open book and we are like the readers who read every one of their rings,” said Carmen Gloria Rodriguez, an assistant researcher at the dendrochronology and global change laboratory at Austral University.
Those pages show dry and rainy years, depending on the width of the rings.

Fires and earthquakes are also recorded in those rings, such as the most powerful tremor in history that hit this area in 1960.

The Great Grandfather is also considered a time capsule that can offer a window into the past.

“If these trees disappear, so too will disappear an important key about how life adapts to changes on the planet,” said Barichivich.

AFP

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