From seedling to forest
Trees are living organisms, woody plants consisting of roots, trunk and branches. Trees are highly developed plants and are among the largest organisms on Earth. The life of a tree is determined by various metabolic processes that occur in its cells. These processes are greatly reduced during dormant phases (winter).
During the vegetation time, the metabolic processes trigger the corresponding growth processes. These special properties of trees thus consist of the interaction of development and metabolism. With the help of chlorophyll, light is absorbed and converted into energy and other metabolic products of use to the tree.
The Development Stages
The development stages are classifications by growth, age, and the lifecycle of a tree. The development and classification start with germination and ends with the death of the tree. The demands of the tree change in each of these stages of development.
The formative phase is during the 1st to the 5th years of development. From the 5th to 80th and 100th years of development, depending on the type, the tree is known as mature. The natural age limit depends on the type of tree and is for birch around 100 years, for maple around 200 years, for beech around 300 years and limes and oaks can reach 400 to 800 years of age. The oldest single example of a native deciduous tree is over 1,000 years old.