Now is the time get out and photograph Autumn’s seasonal changes as there is plenty going on. Typically call the ‘Fall’ because it refers to deciduous trees and shrubs that drop their leaves seasonally.
The leaf drop or ‘abscission’ involves complex physiological signals and changes within plants and based on the steadily reduction of chlorophylls in their foliage, resulting in non-green coloured foliage. This helps the tree or shrub reserve energy and water for the long winter months and protect branches for heavy loaded snow falls.
The colour of the leaves varies from tree to tree and the reduction rate of chlorophyll pigments. The colours left depends on other pigments including carotenoids which are yellow, brown, and orange and Anthocyanin pigments which produce red and purple colours, though they are not always present in the leaves.