Pando: The One Tree Forest

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There is the misconception that the largest creature on Earth is the Blue Whale. Measuring in at 180,000kg it is certainly a sizeable beast but it is far from the largest.  For the larger creatures we must delve into the world of super-organisms. Many individuals connected to form a single whole. The largest of these, that has so far been discovered, is a forest made only of one tree. Pando.

Pando, Latin for ‘I spread’ is a tree, or it is not. That depends on your definition of tree. Pando (a.k.a. the Trembling Giant) is a clonal colony of a single male, Quaking Aspen(Populus Tremuloides). It is located within Utah in the United States of America.

So how does it work? When a Quaking Aspen wants to reproduce, it  flowers and produces a clone of itself. Cloning just means extending its network of roots and forcing them up through the ground, thus starting a new tree. This new tree has the same genetic makeup and even has genetic markers to say that it actually belongs to the first tree. To all intents and purposes it is the first tree, but in a separate place.

The new tree grows with the old one and together they establish a large root network which produces more and more Quaking Aspen, essentially causing the single tree to expand into a clonal colony with a vast root network.

Just how vast is it?

Normally clonal colonies are 0.1 hectares in size, Pando is 43 hectares in size, and weighs 6,000,000 kilograms.

The trees on the surface die, the root network is the real Trembling Giant, and it does not die. It constantly sends up new shoots, renews ill trees and stops supplying nutrients to those which are dead. The reason it cannot die is because the heart of Pando lies too far beneath the ground to be reached by the frequent forest fires. These forest fires are in fact a boon for Pando as they kill off the pesky invading conifers and free up space for many more extensions of Pando to be sent up.

Due to this invulnerability and protection from competition the heart of Pando is considered the oldest known organism in existence. Experts pin it down at approximately 80,000 years old. This impressive longevity makes it the oldest known living organism on our fair planet.

80,000 years ago the Trembling Giant was but a lone tree living in the perfect environment for it to spread, grow, flower and produce clones. However the environment has changed so much over time that it is much less hospitable towards Quaking Aspens. Experts believe that the changes in the environment have been so pronounced that  Pando has not successfully flowered in the last 10,000 years, meaning its survival is dependent upon producing more clones and hoping for forest fires to wipe out the pesky conifers.

Good luck to it.

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Deployed on by Alexandre Coates in Macro Oddities 13 Current Replies

13 Responses to Pando: The One Tree Forest

  1. Angel

    You made a minor typo on the first 80,000. Still enjoyed the article.

     
    • Alexandre Coates

      Thank you for reading and enjoying it carefully enough to spot that, it’s been corrected now.

       
  2. Oren

    Very very cool

     
  3. m-tw

    I am confused as you say it flowers to clone, then you say cloning is new growth from existing roots, then you say it has not flowered in 10000 years and is dependent on root cloning.
    So explain again when flowering is important? To mate with female tress? To create clones not attached at the roots? WHAT?

     
    • Aagli

      As a student of agriculture what I took from this is that the tree does not need flowers to reproduce. If the one male tree would flower and then produce pollen to fertilize the female plant, seeds would be created and this would be heterogenic, meaning they would be different trees from the original ones. This how ever is not the case here, this tree basicly creates a bud in a part of its root wich starts to grow another trunk of the same tree.
      As I was typing this it occoured to me, that this tree could probably also be hermaphroditic and produce both male and female flowers and pollinate itself to create seeds with the exact same genetics and “clone” itself. These physicaly different but essentialy same trees then could connect to other trees by Mycorrhizal network to create a complex of multiple identical trees. I’m unsure however what the author ment here. Would be cool if Alexandre would explain this a bit more. Anyway this was an interesting article and a great read. Thanks!

       
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  5. matthew

    id like to get genetic blue prints to this plant. if this were applyed the right way we could have a brighter future for earth.

     
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  8. Liam

    Where did Pando come from?

     
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