1. How does the proportion of green trees retained through harvest influence various biological and physical attributes of these forests, as well as public perceptions of the acceptability and aesthetics of these harvests?

2. Given a particular level of retention, is the spatial pattern of retention important? In particular, are the effects of retaining trees in undisturbed aggregates different from the effects of distributing them evenly throughout the harvested area?

3. If there are short-term effects of level and/or pattern of retention, are the effects maintained over time as forests develop?

4. Do the effects of level or pattern of retention vary as a function of geographic location, initial stand structure, vegetation zone, or method of harvest?