Jurupa Oak tree is world’s oldest organism at 13,000 yearsDecember 24th, 2009 - 4:08 pm ICT by ANI
London, December 24 (ANI): A new study has identified a tree as the world’s oldest organism, which at 13,000 years, was already thousands of years old when the Egyptians built their pyramids and the ancient Britons erected Stonehenge.
According to a report in The Independent, the tree in question is the Jurupa Oak tree, which first sprouted into life when much of the world was still covered in glaciers.
It has stood on its windswept hillside in southern California for at least 13,000 years, making it the oldest known living organism.
Scientists believe the tree, composed of a sprawling community of cloned bushes, is the oldest living thing because it has repeatedly renewed itself to ensure its survival through successive periods of drought, frost, storms and high winds.
The Jurupa oak, named after the Jurupa Hills in California’s Riverside County, belongs to a species called Quercus palmeria, or Palmer’s Oak.
It was this fact that first alerted scientists to the idea that all was not what it seemed when it came to this particular stand of scrubby oak bushes.
“Palmer’s Oak normally occurs at much higher elevations, in cooler, wetter climates. In contrast, the Jurupa Oak scrapes by in dry chaparral, wedged between granite boulders and stunted by high winds, atop a small hill in plain sight of suburban backyards,” said Professor Jeffrey Ross-Ibarra of the University of California Davis.
Another peculiarity was how the plant grew as mass of bushes that failed to produce fertile acorns.
This suggested that it was a group of clones that had all stemmed from one individual, which was confirmed by DNA analysis.
This single Jurupa oak extends over 25 yards and is extremely slow growing.
The scientists said that it could only have got this big by clonal growth, resprouting from the roots following wildfires.
After a while, the centre of the colony degrades, leaving the haphazard collection of stems visible today.
“Ring counts show that the Jurupa Oak is growing extremely slowly. At its current rate of about one twentieth of an inch (of growth) per year, it would have taken at least 13,000 years for the clone to reach its current size. And it could be much older,” said Michael May, a member of the research team.
If the age estimate it correct, the oak would be 10,000 years older than the oldest American redwood tree. (ANI)
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