even tree tops

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Lucas
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even tree tops

Post by Lucas » Tue Dec 08, 2015 6:17 pm


Click on image to see its original size

I was surprised to see this even line on the tops of these trees. I didn't go over to check but they are likely large toothed aspen. The woodline runs north south. It is interesting that as the hill gets lower the trees get higher. I can't remember seeing this before and wondered what was the cause. Wind comes to mind but there may be other reasons.

BTW Re: large toothed aspen. I was in a grove of them last month and was very impressed with their aesthetics. The trunks were tall and straight and the leaves made a deep duff among a scattered spruce undergrowth. Very pretty.

LTA does best on the north plain here and I am not used to seeing it. A very nice tree for what I used to think was a weed.
We travel the Milky way together, trees and men. - John Muir

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Don
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Re: even tree tops

Post by Don » Tue Dec 08, 2015 11:12 pm

Lucas-
If the line of trees run N-S from left to right, could it be that the advantage of trees to the South having better solarity from southern exposure, might be shading those to the north, and denying in some measure,those trees essential photosynthetic energy sources? The other suspicion I have is that they were probably all planted about the same time, in the same soil, with similar road run-off?
-Don
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Jess Riddle
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Re: even tree tops

Post by Jess Riddle » Tue Jan 05, 2016 7:52 pm

What about a simpler explanation: the taller trees are older. Big tooth aspen is a clonal species. The clone could have started on the right hand side of the image and grown its way to the left side over the course of several years.

Jess

DwainSchroeder
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Re: even tree tops

Post by DwainSchroeder » Tue Jan 05, 2016 10:16 pm

Another possible explanation - as the ground elevation gets lower the moisture supply to the tree roots increases either from storm runoff or from subsurface water movement.

Dwain Schroeder

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mdvaden
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Re: even tree tops

Post by mdvaden » Tue Jan 05, 2016 10:56 pm

DwainSchroeder wrote:Another possible explanation - as the ground elevation gets lower the moisture supply to the tree roots increases either from storm runoff or from subsurface water movement.

Dwain Schroeder
We have a 40 foot row of variegated boxwood along the street in front of our home and the uphill are shorter and the downhill taller. I concluded it must be due to seeping of residual moisture lasting longer for the lowest elevation shrub.

Regarding the trees even height, they basically self-regulate. Trees tops in the middle that are shorter with have greater cell elongation and catch up anytime a gap or shorter spot in the row develops.

...
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Lucas
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Re: even tree tops

Post by Lucas » Wed Jan 06, 2016 3:08 pm

All good points.

Chance is another possibility but it seems unlikely.
We travel the Milky way together, trees and men. - John Muir

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mdvaden
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Re: even tree tops

Post by mdvaden » Fri Jan 08, 2016 12:24 am

Lucas wrote:All good points.

Chance is another possibility but it seems unlikely.
With plants and trees, almost nothing happens by chance. Its related to conditions, or human manipulation.
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