Items starting with F


Federal Advisory Committee Act

Federal Land

Land owned by the United States, without reference to how the land was acquired or which Federal Agency administers the land, including mineral and coal estates underlying private surface.

Federal Land Policy and Management Act of 1976 (FLPMA)

Public Law 94-579, which gives the BLM legal authority to establish public land policy, to establish guidelines for administering such policy and to provide for management, protection, development and enhancement of the public land.

Federally listed threatened and endangered species

A plant or animal that is in danger of extinction throughout all, or a significant portion, of its range. Endangered species are identified by the Secretary of the Interior in accordance with the Endangered Species Act of 1973.


Cutting down trees.

Final Cut

The removal of the last seed bearers or shelter trees after regeneration of new trees has beenestablished in a stand being managed under the shelterwood system of silviculture.

Fine filter management

Management that focuses on the welfare of a single or only a few species rather than the broader habitat or ecosystem. (See coarse filter management.)

Fine fuels

Small needles, sticks, branches of trees (generally less than 3 inches in diameter).

Fire Cycle

The average time between fires in a given area.

Fire frequency

How often fires occur within a given time period in a specified area.

Fire hazard

The overall potential for wildfire in a vegetated ecosystem, often expressed as a condition of fuels on the ground and the probability of ignition. To reduce the fire hazard in an area, managers must deal primarily with the fine fuels on the surface of the forest floor and with the smaller diameter trees growing in the understory of a forest that provide a ladder to the larger, dominant overstory trees.

Fire intensity

The rate at which fuel is consumed and heat is generated.

Fire management plan

A strategic plan that defines a program to manage wildland and prescribed fires and documents the Fire Management Program in the approved land use plan. The plan is supplemented by operational plans such as preparedness plans, pre-planned dispatch plans, prescribed fire plans, and prevention plans.

Fire regime

The characteristics of fire in a given ecosystem, such as the frequency, predictability, intensity, and seasonality of fire. The fire pattern across the landscape, characterized by occurrence, interval, and relative intensity. Fire regimes result from a unique combination of climate and vegetation and exist on a continuum from short-interval, low-intensity fires to long-interval, high-intensity fires.

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