In the remote temperate rainforests of southern Chile, a colossal Patagonian cypress known as Gran Abuelo (Great Grandfather) or Alerce Milenario stands as a living testament to deep time. Located in Alerce Costero National Park, this massive Fitzroya cupressoides has captured international attention as a strong contender for the title of the oldest individual living tree on the planet.
An Age Shrouded in Mystery
Chilean scientist Jonathan Barichivich and his team estimated the tree’s age at approximately 5,484 years using partial core sampling, growth-rate modeling, and climate data comparisons with other alerces. The modeling suggests an roughly 80% probability that the tree exceeds 5,000 years in age.
Unlike younger trees where complete ring counts are straightforward, fully coring such an ancient giant poses significant risk to its health. As a result, scientists rely on non-invasive methods and statistical projections. A different alerce in the region has been verified at 3,655 years through ring counting, lending credibility to the possibility of extreme longevity in this species.
If confirmed, Gran Abuelo would surpass Methuselah, a bristlecone pine in California’s White Mountains dated at around 4,853 years—the oldest tree with a confirmed ring count.
The Remarkable Alerce
Patagonian cypresses are slow-growing conifers renowned for their dense, rot-resistant wood, which allows them to thrive for millennia in the cool, wet conditions of the Andean foothills. These trees can reach enormous sizes, with thick, furrowed bark that protects them from environmental stresses.
Gran Abuelo grows in a protected ravine, shielded from historical logging pressures that once decimated alerce populations. The species was heavily exploited in the past for its valuable timber, making surviving ancient specimens like this one especially precious.
Beyond Individual Trees
While Gran Abuelo stands out among individual organisms, certain clonal colonies—such as quaking aspen groves or ancient fungal networks—can claim even greater collective ages. However, for a single, non-clonal tree, few living things rival the estimated longevity of this Chilean giant.
Recent ecological studies have also highlighted the rich fungal ecosystems thriving in the soil around these ancient alerces, underscoring their role as keystones in their forest environments.
Significance and Conservation
The story of Gran Abuelo, which first gained widespread attention around 2022, continues to resurface because it embodies resilience and the living history of our planet. These ancient trees provide valuable data on past climate patterns spanning thousands of years.
Yet, they face growing threats from climate change, wildfires, and human activity. Conservation efforts in Alerce Costero National Park and surrounding areas remain vital to protecting not just this single tree, but the entire fragile ecosystem it sustains.
As scientists continue refining age estimates and monitoring these forests, Gran Abuelo serves as a powerful symbol of nature’s endurance—and a reminder of our responsibility to preserve Earth’s oldest living inhabitants for future generations.
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