The availability of some core resources may be limited, so trees compete with each other to meet their needs. Different parts of a tree play different roles in collecting these resources. Plants have specific needs (light, air, water, nutrients and space) to survive and reproduce. The buds, the tips of the roots and the cambium layer are the three growing parts of the tree.
The buds lengthen the branches and widen the crown (branches and leaves), the cambium layer adds diameter to the tree and the root tips grow in length to support the growth of the tree. Although some trees have adapted to grow in more unfavorable soil and light conditions, most trees only grow well under relatively specific circumstances. My goal is to help you understand how it links to the trees you see in your forests and why the types of trees change over time. As a result, tree growth responds both to the environment and to the genetic makeup of trees.
However, the average tree in urban settings has only one-tenth the lifespan of a tree in a rural site. A tree (or trees) dies from old age, poor health, or a natural event, and other small trees wait in the wings to take advantage of newly available resources. All woody trees have an outer bark that is constantly renewed and protects the tree from pest attacks and environmental impacts, such as fire and mechanical injury. Trees need stored starch to carry out their normal functions, especially to break dormancy in temperate trees.
These stresses affect the tree making it more susceptible to insects and diseases, and eventually succumbs to a causative agent or competing pressures from other plants adjacent to the tree that grow more vigorously. It can be the same tree, a new tree, or another tree of a different species, but all trees originate from seed.