ABSTRACT
INTRODUCTION Tree surgery is an important aspect of arboricultural care, and much of the work of the modern professional tree surgeon involves cutting with either handsaw or chainsaw (521). Ideally, such human interventions should not be necessary and trees in the wild have their own survival
strategies; various species of broadleaved trees such as Quercus (oak, 522) and Olea (olive) can survive for many hundreds of years, while the Californian coniferous redwoods (Sequoia sempervirens and Sequoiadendron giganteum) generally live for much longer (Chapters 2-3).
