This issue is outside the scope
of this review, which focuses on management at the stand level.
For the purpose of this review we have adopted a structure-based
approach, and define old-growthness as a general aggregate
measure of structural attributes listed in Table 1 for two reasons.
Firstly, silvicultural practices modify stand structures and their
dynamics directly, and secondly, information about links between
stand structures, habitat provision and ecosystem functions is
available