Thus, the often massive structure of a mature tree above ground, consisting of the stem, branches, twigs and the attached foliage, is highly efficient in intercepting, using and storing solar energy, while also bearing its own weight and dissipating the potentially damaging forces of the wind.
Below ground, although far less obvious, the extensive root system is equally efficient both in providing anchorage and in pervading the soil in order to absorb the water and mineral nutrients that are essential for survival, growth, flowering and fruiting.
The need for tree work will sometimes become self-evident to tree owners and site managers in the course of their regular duties. Tree work ideally forms part of a planned programme of management, which includes the successional planting of trees well-suited to their surroundings.