Backyardsafari's Blog

Environmental Inspiration in Your Own Backyard

Backyard Tree Changes November 6, 2010

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The brilliant colors and swirling leaves of Fall are starting to fade now as the trees become bare and Nature’s works of art are raked into quiet piles along my street.

The tree I studied for my submission to the Backyard Transition Challenge is now empty of leaves, and I have compiled all of the pictures together into a short video showing how the colors changed throughout the season.  I took pictures of this same tree every 1 – 3 days from August 2nd until November 3rd. Over these 93 days I watched as my tree began to turn red, first in small blushes on the ends of a few branches, and finally blooming across the entire tree in a grand finale of sorts, as all of the leaves fell off just a few days later.

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(Note: I recommend making this video “full screen” so you can see the pictures clearly. You can do this by pushing the button with 4 arrows in the far right of the YouTube screen)

The video goes through the pictures once quickly, and once more slowly so that the smaller changes are visible.

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I did some research and learned that the red color in the leaves comes from a chemical called anthocyanin. Anthocyanin is a pigment that acts as a sunscreen of sorts for the leaves, and as the production of green chlorophyl slows in the leaf in Autumn, this pigment (and the pigments that make yellow and orange colors) becomes visible. Not all leaves have anthocyanin, and some scientists think they might help trees hold on to their leaves longer by reducing the freezing point of the leaf.

I noticed a few different patterns while watching this tree.  First, the north facing side of the tree, which I didn’t take a picture of, turned red long before the south-facing side (the side I photographed). In this hemisphere south-facing slopes tend to get more sun, so I wondered if maybe the south-facing side changed slower because it had more access to the sun than the other side of the tree. I looked around at other trees to see if this was a trend, but I couldn’t really find one so my hypothesis is untested for now and it could have just been a coincidence. Have any of my delightful readers ever heard of one side of a tree changing faster than the other before?

I also noticed that a few branches started to turn red first. Before starting this project I wondered what the order was–did all of the leaves start to change at the same time, or did one branch at a time, or did leaves change from the inside of the tree out, etc.  It seems that at least for this tree it did in fact start in different branches.

Finally, I also realized that the reason why I often felt like trees were green one moment and in full color the next is because it’s kind of true! The tree had only small amounts of color for a long time before finally exploding into its full red. Not only that, but all of the leaves were gone from the tree just a few days after it turned its brightest colors.

The series of pictures below shows how the tree looked over time:

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08/02/10

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09/07/10

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10/07/10

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(10/26/10)

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10/27/10

The day after the above image!

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Of course the transitions my tree experienced won’t be the same as the ones other trees are going through! Different tree species probably change at different rates, some may hold on to their leaves longer, and of course the colors will be different. Even so, it was really interesting to track the changes going on in my backyard and see what I could learn from them. Taking notice of this one tree enhanced my view of other Autumn changes, and I was much more aware of them than I have been in the past. I already have plans for next year–I’d like to take a zoomed in picture of the same leaf every day, to see how the color spreads within it. I would also like to take pictures of multiple tree species to see how they are different. Finally, I might just keep taking pictures of this tree to see what it looks like when it snows, and when the leaves start to grow back again in the spring.

What kind of changes are going on in your backyard? Did the trees around you change color? Do they still have their leaves? Are some changing faster than others? Take a quick look around and see what you can find. I promise it will enrich your life for the better!

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11/03/10

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If you documented any changes as part of our Backyard Transition Challenge, or have any thoughts or questions, I would love to hear from you! I can be reached by e-mail at askbackyardsafari@gmail.com.

Thanks for reading–I hope we can all be active participants in the natural world around us and take notice of the many wonders growing and changing all over Planet Earth!

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2 Responses to “Backyard Tree Changes”

  1. Rita Glantz Says:

    What a glorious retreat.

  2. […] to try! In the mean time, I am going to take pictures of them every day, just like I did for the Backyard Transition Challenge last fall. I encourage you to do the same! If not something you are growing, than just something […]


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