this post was submitted on 11 Aug 2026
31 points (100.0% liked)
Asklemmy
55214 readers
180 users here now
A loosely moderated place to ask open-ended questions
If your post meets the following criteria, it's welcome here!
- Open-ended question
- Not offensive: at this point, we do not have the bandwidth to moderate overtly political discussions. Assume best intent and be excellent to each other.
- Not regarding using or support for Lemmy: context, see the list of support communities and tools for finding communities below
- Not ad nauseam inducing: please make sure it is a question that would be new to most members
- An actual topic of discussion
Looking for support?
Looking for a community?
- Lemmyverse: community search
- sub.rehab: maps old subreddits to fediverse options, marks official as such
- !lemmy411@lemmy.ca: a community for finding communities
~Icon~ ~by~ ~@Double_A@discuss.tchncs.de~
founded 7 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Wind dominates the morphological structure of trees. Weight is not the limit to tree height. Trees could grow many times their current maximum height on a planet with no wind. You could hang iron weights on most trees much greater than the weight of the tree. As long as the wind wasn't blowing hard, the tree would stand.
Wind, the movement of something as light as air, is able to dominate the form land plants have evolved into.
Now realize that water has a thousand times the density of air.
There's a reason all it takes to cause a local explosion of diversity in sea life is to dump something solid like a subway car into the sea. Water has so much momentum behind it that life struggles just to remain firmly fixed in one place while subject to waves and current.
EDIT: Also one other major structural factor: soil! Dry well compacted soils are stronger than moist loose soils. The sea bed is an ever-churning bed of loose water logged mud and sand. So not only are ocean plants subject to much greater lateral loads due to the 1000x density of water over air, but those ocean plants also must cling to the worst foundation imaginable.
I thought the California redwoods proved it was a different thing limiting height. They get water from the air because of how humid it is and therefore grow taller because their main limitation was the ability to move water from their roots to the rest of the tree.
That article is unfortunately devoid of the information we need.
I however managed to find the Nature article that it appears to be based on.
https://annas-archive.pk/scidb/10.1038/nature02417/
Trees do face limits on their height due to the limits of the lengths capillary forces can draw water up through their cells. However, the figure quoted is from a regression analysis of living trees. It's not a prediction of how tall trees could evolve if certain environmental stresses were removed. It's a prediction of the maximum height achievable by California Redwoods.
From the paper:
So note that even though the trees on the coast have moisture conditions, they still reach lower heights than those further inland.
The key thing to keep in mind is that the current maximum height achievable by living tree species is not the maximum height of trees allowable by physics. For example, instead of relying only on osmotic pressure, trees might evolve a staged-lift system, where they have upper reservoirs that feed one into the next. This is how tall skyscrapers handle their plumbing systems. A hundred story building will have water tanks at different levels rather than just one big tank on the roof. This prevents the need to have pipes at the base of the skyscraper capable of surviving 100 stories worth of water pressure.
There's no need for trees on our planet to evolve such mechanisms. The limits for wind kick in at similar heights to the limits of the water transport mechanisms trees have evolved. But other mechanisms would have different limits. There just isn't any evolutionary pressure to develop them.
Although, the paper does make being a tree scientist sound like an amazing job.
That's very cool.