I’m studying ecology right now, and I’m a bit confused by this.
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Bedrock still has nutrients in it that trees can use, and it isn’t a homogenous slab of rock so tree roots can still find a hold down there. Will the tree grow quickly? No. Will it be as large as a tree of the same species in fertile topsoil? Also no. Will it at minimum survive? There’s a good chance it will.
Trees don’t actually need that much from the soil, they can get most of what they need from the air. As long as there are a few cracks / ridges the roots can grab onto, they will be able to grow. Maybe some moss will grow to hold nutrients or there will be a big enough crack where it will collect.
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