What is the effect of installing cables too tightly on a tree branch?

Installing cables too tightly on a tree branch can cause significant damage to the limb. When cables are applied with excessive tension, they can constrict the tree's natural growth and impede its ability to transport nutrients and water through the vascular system. This can lead to girdling, where the bark is damaged, disrupting the flow of nutrients and potentially resulting in the branch dying off. Additionally, tight cables can cause abrasions and wounds on the branch, making it more susceptible to diseases and pests. Therefore, proper installation of support cables with an appropriate amount of tension is essential to maintain the health and structural integrity of the tree.