Every year there is a change in nature's color palette as we move into the crisp, cool and darker days of Autumn. Vivid reds, yellows, purples and browns paint the trees and blanket the ground as leaves float down from branches above.
Decreases in daylight and temperature cause trees to begin shutting down their food production for the winter. Chlorophyll, which is responsible for making glucose that feeds the tree and for the green color of the leaves, slowly fades. The color that remains consists of browns (the leaf cell walls), orange and yellows (carotenoids) and reds and purples (anthocyanins).
The leaves that are shed by each tree are recycled back into the soil, enriching the earth to support next season's natural growth.
To learn more about the science behind the colors of the fall visit: http://www.na.fs.fed.us/fhp/pubs/leaves/leaves.shtm