Leaves, Trees, and Gigapans

My location of my gigapan is in front of the Environmental Studies Train Station on SBC. I identified a conifer tree called Ashe Juniper; it is on the left side of the train station. The second tree I discovered is a Silver Maple and it is to the right of the station. Lastly, near/behind/to the left of the Ashe Juniper, I identified  a Pumpkin Ash. So far, the Silver Maple and Pumpkin Ash are beginning to change yellow (I went to visit these lovely trees after the gigapan was taken; in the photo they are still pretty green) but the Ashe Juniper is staying green. The reason why leaves change color in the fall is the tree's way of saving energy. The trees break down compounds in the leaf and reabsorbs nutrients, thus killing off the leaves. Basically, trees absorb energy through their leaves all throughout spring and summer and when the weather begins to become cooler in the fall, the tree collects all that stored energy and the leaves die due to the absorbed energy the trees contained to survive the cold, harsh winter. Here is a link to the tree identifications just in case if it's hard to know where/what I'm identifying: http://gigapan.com/gigapans/115310 Please Enjoy! :)