B.S.F. or B.Sc.F. Bachelor of Science in Forestry Bachelor of Science in Forestry: Navigating Forest Management 2 — Questions and Answers
Question 1: Which silvicultural system involves removing all trees in a stand simultaneously to regenerate a new even-aged forest?
- Selection cutting
- Shelterwood cutting
- Clearcutting (Correct answer)
- Seed-tree cutting
Correct answer: Clearcutting
Clearcutting removes all trees at once, creating even-aged stands that regenerate together from seeds or sprouts.
Question 2: The 'allowable cut effect' in forest management refers to:
- The legal maximum volume that can be harvested per acre
- Increasing current harvest levels based on anticipated future forest growth from investments (Correct answer)
- The reduction in timber output caused by protected area designations
- A formula used to calculate sustainable yield in uneven-aged stands
Correct answer: Increasing current harvest levels based on anticipated future forest growth from investments
The allowable cut effect justifies increasing current harvest by counting on anticipated future yields from silvicultural investments like planting or thinning.
Question 3: Which of the following best describes 'site index' in forestry?
- A measure of soil carbon sequestration capacity
- The average number of trees per acre on a given site
- The height of dominant trees at a specified base age, used to rate site productivity (Correct answer)
- A rating system for wildfire risk based on fuel load
Correct answer: The height of dominant trees at a specified base age, used to rate site productivity
Site index measures the height of dominant or co-dominant trees at a base age (commonly 50 years) as an indicator of site productivity for timber.
Question 4: In the context of forest hydrology, what is a 'rain shadow'?
- A zone of increased precipitation on the windward side of a mountain
- A dry area on the leeward side of a mountain range caused by orographic lifting (Correct answer)
- The reduction in rainfall caused by forest canopy interception
- A microclimate created beneath dense riparian vegetation
Correct answer: A dry area on the leeward side of a mountain range caused by orographic lifting
A rain shadow forms when moist air rises and loses precipitation on the windward slope, leaving the leeward side arid.
Question 5: Which federal law established the framework for managing National Forests under multiple-use and sustained-yield principles?
- Wilderness Act of 1964
- National Forest Management Act of 1976
- Multiple-Use Sustained-Yield Act of 1960 (Correct answer)
- National Environmental Policy Act of 1969
Correct answer: Multiple-Use Sustained-Yield Act of 1960
The Multiple-Use Sustained-Yield Act of 1960 formally directed the US Forest Service to manage National Forests for timber, range, watershed, wildlife, and recreation.
Question 6: What does 'basal area' measure in a forest stand?
- The total leaf surface area per unit of ground area
- The cross-sectional area of tree stems at breast height per unit of land area (Correct answer)
- The root biomass per hectare in a given stand
- The proportion of ground covered by tree canopy
Correct answer: The cross-sectional area of tree stems at breast height per unit of land area
Basal area is the sum of cross-sectional areas of all tree stems measured at breast height (4.5 feet) per acre or hectare, indicating stand density.
Question 7: The concept of 'forest fragmentation' is most directly associated with negative effects on which ecological process?
- Primary productivity of individual trees
- Wildlife movement and gene flow between habitat patches (Correct answer)
- Soil nutrient cycling in old-growth stands
- Carbon storage in deep mineral soil horizons
Correct answer: Wildlife movement and gene flow between habitat patches
Forest fragmentation breaks up contiguous habitat into isolated patches, impeding wildlife movement, dispersal, and genetic exchange between populations.
B.S.F. or B.Sc.F. Bachelor of Science in Forestry Bachelor of Science in Forestry: Navigating Forest Management 2
Which silvicultural system involves removing all trees in a stand simultaneously to regenerate a new even-aged forest?