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9 Cards in this Set

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Impact of fire on shrubs and grasses

1. Position of meristematic tissue


2. removal of aboveground growth


3. repeated suppression of fires - woody veg replaces grasses

Frequency of wildfires

FFI = fire free intervals


Giant sequoias = 10-20yrs


ponderosa pines = 6-9yrs


prairie grasslands = 3-5yrs

Prescribed burning

The judicious use of fire for a constructive purpose and according to a mgmt plan

Prescribed burning objectives (6)

1. increase forb abundance


2. manage invasion of shrubs and woody veg


3. retard succession


4. create edge


5. increase diversity


6. rejuvenate woody plants for browse production

factors influencing a prescribed burn (5)

size of burn


amount and type of fuel


fuel moisture content


soil moisture


timing and frequency of burn

The prescription (7 elements)

1. seasonal timing, late winter = cool season forbs


2. Fuel - fine fuel carries fire


3. Topography and physiography - natural firebreaks


4. Weather - humidity, temp, wind speed


5. Firelines & Firebreaks - mechanical removal of fuels


6. Equipment & Crew - fireboss, workers, pumper


7. Structures and neighbors - fences etc.

Fire anatomy

Types of Fire (4)

1. backfire - moves against the wind


2. head fire - moves with the wind


3. strip-head fire - several persons walking perpendicular to the wind


4. flank fire - fires started by walking into the wind

fire - effects on wildlife

- BobwhiteQuail respond positively to burning -


- Bare ground and forb production (quail are earlysuccession animals)


- 1 - 2 year old burns.




- prairie chickens, elk, deer increase