Biology Stack Exchange
Biology Stack Exchange

Questions tagged [trees]

Common classification for perennial plants with woody, elongated stems.

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Less oxygen in winter?

Since Oxygen is produced by photosynthesis, would there be less oxygen in the air in winter, where the trees shed their leaves and the sun generally shines a lot less? If yes, would that be a noticable difference?
Suimon
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Strategy for tree and shrub identification

I often find it difficult to identify trees and shrubs even though I have many handbooks and manuals on trees and shrubs in my area (New England). The typical problem is that the species is not in the handbook, or that it is very similar to many…
Imprisoned Rhesus
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If it weren't for animals, insects, or people, would plants that produce seeds (nuts, fruit, etc) cease to exist?

I gather that some would or could in theory still be successful, but don't most depend on takers to flourish?
Private Name
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Did the eclipse make the leaves fall?

I live in Pittsburgh PA, the eclipse on Monday August 21 was only about 80% coverage here. It was notably darker, but less dark then an overcast day. The night of August 21, had a low temp of about 70F. On my daily walk the following day (Aug 22)…
James Jenkins
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Why do autumn leaves on the eastern sides of trees change and fall before the western leaves?

I've noticed that for the autumn leaves in my area (Great Lakes region of United States), if a tree's leaves are changing or falling asymmetrically, they almost always change first on the East-facing side of the tree. I can't find any explanation…
Sam
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Where can I find trees preserved for hundreds of years?

I assume there are climate conditions that cause trees to be preserved, since there are fossilized trees, however, it may be extremely rare to find a tree in a nascent state of fossilization. Is it possible to easily find trees that have been…
Imprisoned Rhesus
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What is the difference between stomata in evergreen broadleaf trees and deciduous broadleaf trees?

They must have some difference in their stomatal density /whether they are hypostomatous or amphistomatous/whatever, mustn't they?
burton guster
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Do evergreen trees have higher densities of stomata to compensate for retaining leaves?

According to literature (Walls-Thumma), evergreen trees have less stomata on their leaves (than deciduous trees) to limit water evaporation. Does this mean they have less less stomata in total, or do they have stomata on the adaxial surface that…
Burton Guster
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Why do trees prefer their sunlight a bit diffused?

I don't know what "a bit diffused" here means. Do other plants also "prefer their sunlight a bit diffused"?      Mount Pinatubo was the most powerful volcanic eruption in nearly one hundred years. Within two hours of the main blast, sulfuric…
user63016
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Is this an eastern hemlock (Tsuga canadensis) seedling?

I recently planted a few seeds gathered from a Tsuga canadensis cone in soil gathered from a garden full of weeds. I can't tell if what I have growing is a hemlock seedling or just another weed. See photo:
Ian
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For wide trees such as Alerce Milenario, can't a longer core just be made (according to web sources the tree is too wide for standard corers)

The Alerce Milenario is only a candidate for the oldest tree. The verified oldest is a bristlecone pine. Trees like Giant Sequoia and Alerce grow both tall and wide, some others stay low to the ground but have massive trunk widths. Bristlecone pines…
TitaniumVCarbon
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why do some trees have trunks that branch out and others don't?

I've never seen a bald cypress that had a tree fork but oak trees have them all the time. Any ideas as to why this is? Bald Cypresses are usually found in very wet areas whereas oak trees tend to be found in more comparatively arid areas so maybe…
neubert
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Why does this tree have a round hole?

One of my soccer students was hiding behind a tree when he discovered this hole. I've tried Googling it but I couldn't find out why this tree has a hole.
Jossie Calderon
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Where can I find a list of trees in the world?

I want to make an app for smartphones that list most common trees in the world. Where can I find a list? I would like to include if the tree is deciduous or perennial and geography/climatic location. I can buy a book if it is complete, preferably…
user65382
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How do tree gnarls develop?

What causes the trees to develop gnarls? I can't find anything on internet other than dictionary definitions. Are they caused by a mold, like the burls?
Ark25
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