Definition (Source: Wikipedia)
***An arborist (or tree surgeon) is a professional in the practice of arboriculture, the management and maintenance of trees. Work may also include care of shrubs, vines, and other perennial woody plants. An arborist is distinct from a forester, or from a logger. Those professions may have much in common, but the scope of work is different. Arborists frequently focus on health and safety of individual trees, or wooded landscapes, rather than managing forests or harvesting wood. Certified Arborist / Utility Specialists work on trees near power lines. Closely related careers include landscapers, tree farmers, and nurserymen. Those professions are closely related because each one utilizes much of the same technology, education and training. An arborist's work may involve very large and complex trees, or ecological communities and their abiotic components in the context of the landscape ecosystem. These may require monitoring and treatment to ensure they are healthy, safe, and suitable to property owners or community standards. This work may include some or all of the following: planting; transplanting; pruning; structural support; preventing, or diagnosing and treating phytopathology or parasitism; preventing or interrupting grazing or predation; installing lightning protection; and removing vegetation deemed as hazardous, an invasive species, a disease vector, or a weed. Arborists may also plan, consult, write reports and give legal testimony. While some aspects of this work are done on the ground or in an office, much of it is done by arborists who climb the trees with ropes, harnesses and other equipment. Lifts and cranes may be used too. The work of all arborists is not the same. Some may just perfom consulting; others may perform climbing, pruning and planting: a combination