Showing posts with label Quercus bushii. Show all posts
Showing posts with label Quercus bushii. Show all posts

Tuesday, October 26, 2010

Deer Rubbed Oak

When you regularly walk the same trail, it’s pretty easy to notice a change. Some things are really obvious, like having a tree slap leaves in your face in a place that has always been clear trail. I didn’t actually get a face full of leaves, but the possibility was there when this formerly vertical tree changed to a more horizontal attitude.

The tree didn’t make the change of its own accord. A male member of the local White-tail Deer population chose this oak sapling as a prime place to release some aggression and place a scent marker identifying his territorial claim. An antlered buck can quickly debark a small tree.

This tree was doing a good job of competing with its neighbors for a piece of the rapidly closing tree canopy. Lost bark and broken branches are going to be quite a set-back.

You can tell by the healthy green leaves that this tree was successfully capturing a good share of the available sunlight. This is one of those oak hybrids, Quercus bushii, that are so common at Blue Jay Barrens. Even though it’s common, I’d hate for it to be lost.

Even if it survives the loss of bark, this tree will never return to an upright posture. New growth will develop vertically, but there will be numerous leaders competing to be the new tree top. If a mature tree is eventually produced it will have some deformities that will limit its life expectancy. I’ll probably cut the tree off at the ground this winter and remove a couple of neighboring small cedars to produce a larger hole in the canopy. The established oak root system should produce a rapidly growing stump sprout that could easily make its way back into the canopy in a few years. Assuming a deer doesn’t trash it again, a healthy, mature tree could eventually develop.

Wednesday, September 15, 2010

Chewed Oak Leaves

When I first saw these leaves, I thought they had been hard hit by some herbivorous insects. Closer examination made me think the leaves may have been distorted by some infection or weather related phenomenon. The margins of the leaf appear to be healthy. Could the leaves have been eaten at an early developmental stage and then healed as they matured?

The leaves belong to a small oak on the edge of one of the prairie openings. Not all of the leaves are like those above, but I couldn’t find a single leaf on the tree that hadn’t been damaged in some way. Being on the edge of two different habitat types increases the range of insect species that might come into contact with and find edible, this little oak.

Some leaf clusters suffered just minor damage. This tree bears all of the indicators of being Quercus bushii, a hybrid between the Blackjack Oak, Quercus marilandica and the Black Oak, Quercus velutina. Perhaps, instead of hybrid vigor, this individual received enhanced taste as a result of the cross.

The feeding pattern on this leaf makes me more certain that the damage to the first leaf was indeed feeding damage. Until a better theory comes along, I’m going to say that the feeding was done on young leaves and the leaves partially healed as they grew.

I wish I could have seen this tree early in the year, but it’s impossible for me to get around and see everything in all seasons. I’ve noticed that the majority of things I notice while I’m walking are within ten feet of me. I’ve walked through this particular prairie opening many times this year, but if I was more than ten feet from the tree, I probably wouldn’t have noticed anything peculiar about the leaf shape. This is another one of those things that I’ll put on my list to watch out for next year. Maybe I’ll find the answer then.