The Science Fact You've Been Taught for Years Is a Lie | Astrum Earth
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What is the 'Wood Wide Web' and why is it significant?
Over the past 25 years, scientists have presented us with a captivating, almost Disney-esque tale. Imagine a diverse and vibrant forest, filled with trees of different ages and species, all thriving in the sunlight that powers their cellular functions. But hidden beneath the surface, intertwined within their roots, are thin, hair-like strands of a different kingdom altogether. These branching structures serve not only to expand the reach of each individual tree, but they connect multiple trees together, allowing messages to be communicated in a buzzing multi-server system akin to the invention that changed the course of human civilization, the internet. Welcome to the Wood Wide Web. I'm James Stewart and you're watching Astrum Earth.
Now buckle up, because we're about to recount a scientific tale with more twists, turns and knots than an old oak tree. The discovery of the wood wide web mesmerised the public as much as the internet itself, resulting in the publication of countless popular science articles, books, documentaries, films, podcasts and more. But is there more to the story? A growing number of scientists certainly seem to think so, and the result has been a bitter academic war that still continues to this day.
How did Suzanne Simard's research change our understanding of trees?
In this video, join me as we uncover the whole story behind the famed Wood Wide Web, where it all began, its impact on conservation, and the wealth of research it inspired into the secret lives of our wooden friends. Our story begins in the temperate forests of British Columbia in Canada. Suzanne Simard is about to make a discovery that will help her to achieve the near impossible with her PhD thesis, making the cover of nature. In 1997, her article was published with the title Net Transfer of Carbon between ectomycorrhizal tree species in the field, which is fairly unassuming considering the content of this paper. In essence, Simard was claiming to have observed the transfer of carbon between seedlings of paper birch and Douglas fir in the field through a shared fungal connection between their root systems.
Not just any old fungus can form a connection with trees. This privilege is mostly reserved for mycorrhizal fungi. The term mycorrhizal fungi refers to a broad group of species that have been forming beneficial partnerships with plants for over 450 million years. Their name comes from the Greek myx meaning fungi and rhiza meaning root, which is accurate because these fungi form their relationships with the roots of their plant partners, extending the reach of the plants through a fungal network called the mycelium.
What role do mycorrhizal fungi play in tree communication?
These networks are so vast, it's estimated that every one kilogram of soil can contain up to 200 kilometers of fungal strands. And some individual fungi can extend across a hundred square meters. With this impressive reach, the fungus can help its plant friends to absorb more nutrients from the soil in exchange for some of their sugars. This is an example of symbiosis, because both parties get something good out of the relationship. Now, scientists already knew about this network at the time of Simard's research. All the way back in 1885, the German plant biologist Albert Bernard Frank wrote a paper describing the symbiosis between plant roots and mycorrhizal fungi in Prussian truffle districts.
And throughout the 20th century, scientists had documented the transfer of carbon, nitrogen, and phosphorus through fungal connections in lab experiments. But what made Simard's discovery so exciting was that she claimed to have seen trees using this network to transfer carbon out in the forest, which was a big deal. In the forest there are far more variables at play, some of which are near impossible to replicate in a lab study. anything that you observe in these natural environments is a far more realistic snapshot of what is really going on. So it's often the final piece of evidence needed to prove a theory. This was no different for the theory of a woods wide web. Scientists knew it existed and had some idea of what it could do.
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Chapters
8 chapters
1
What is the 'Wood Wide Web' and why is it significant?
0:00–1:37
2
How did Suzanne Simard's research change our understanding of trees?
1:37–3:17
3
What role do mycorrhizal fungi play in tree communication?
3:17–5:53
4
What evidence supports the concept of resource sharing among trees?
5:53–9:54
5
Why did some scientists begin to question the Wood Wide Web theory?
9:54–13:44
6
What were the main criticisms highlighted in the recent review of the Wood Wide Web?
13:44–17:54
7
How do trees communicate using volatile organic compounds (VOCs)?
17:54–22:23
8
What lessons can we learn from the debate around the Wood Wide Web?
22:23–29:57
Speakers
2 identifiedMore from Astrum Space
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