Introduction to Silvicultural Systems Flashcards
Enumerate Silvicultural Systems in order of Increasing Harvest Intensity
- Single-tree selection system
- Group selection system
- Shelterwood system
- Seed Tree System
- Clearcut System
A silvicultural systems that removes single trees or small groups
Selection Systems
What are the 2 outcomes of selection systems
- New age cohorts
2. Regeneration of mostly shade-tolerant species
In what age class does selection systems fall under?
Uneven-aged system
Create small gaps to favor the regeneration of shade-tolerant species
Single-tree selection
3 Practical Implications of Single-tree selection
- Difficult to set up properly
- Challenging operationally
- Primarily used in hardwood systems
Uneven-aged system often favoring shade tolerant species, but depends on gap size
Group Selection
Group selection creates small gaps within ____ matrix
intact
Group selection method that becomes more common nowadays
String of pearls
2 Practical Implications of group selection
- More efficient operations
2. Diversifying/mixing stands
A method where partial harvest is done to establish advanced regeneration
Shelterwood Method
What does shelterwood method favor?
Mid-tolerant species
In what age class is shelterwood method applicable?
even-aged system
Shelterwood method releases advanced regeneration by?
Removal of canopy
Practical Implications of Shelterwood systems
- Somewhat common
- Uncertainty
- Requires repeated entries, risk of damaging regeneration
Method in which all trees were harvested except for few large trees per acre of desired species as seed source
Seed tree method
In seed tree method, seed trees may be ____ or _____
Retained, removed
What does seed tree method favor?
Shade intolerants
2 Practical implications of seed tree method
- Relatively rare
2. Uncertainty due to forest health concerns
The seed tree method operates under what age class?
Even-aged system
The method in which all or nearly all trees are harvested
Clearcutting method
The clearcutting method operates under which age class
Even-aged system
4 Practical implications of clearcutting method
- Common
- Emulates large-scale catastrophic disturbance
- Best method for light demanding species
4, Efficient system
Most common intermediate treatment
Timber Stand Improvement (TSI)
What kind of trees are selected in TSI? (3)
- Undesirable species
- Trees with poor forms
- Trees that are too close to other desirable species
Practice of logging trees in forest areas that have been damaged by wildfire, flood, severe wind, disease, insect infestation, or other natural disturbance in order to recover economic value
Salvage cutting
Removal of dead trees or trees being damaged or dying due to injurious agents other than competition
Sanitation cutting
