Umpqua Watersheds
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Glossary
Glossary

Abbreviations


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  Glossary   E
Early forest succession
The biotic (or life) community that develops immediately following a clear cut or fire. For instance, grasses may be the first plants to grow in an area that was burned.
Ecology
The interrelationships of living things to one another and to their environment, or the study of these interrelationships.
Ecosystem
An arrangement of living and non-living things and the forces that move among them. Living things include plants and animals. Non-living parts of ecosystems may be rocks and minerals. Weather and wildfire are two of the forces that act within ecosystems.
Ecosystem management
The buzz word to make deforestation sound palatable to the general public. USFS definition: "An ecological approach to natural resource management to assure productive, healthy ecosystems by blending social, economic, physical, and biological needs and values."
Edge effect
The effect on the surrounding forests from the edges of a clear cut. Common edge effects include trees blown down, spreading root rots and other diseases, and invasive weeds. Edge effects often travel very far into the surrounding interior forests.
Endangered species
A plant or animal that is in danger of extinction throughout all or a significant portion of its range. Endangered species are rarely identified by the Secretary of the Interior in accordance with the Endangered Species Act of 1973.
Endemic plant/organism
A plant or animal that occurs naturally in a certain region and whose distribution is relatively limited geographically.
Environmental assessment
A brief version of an Environmental Impact Statement. (EA) A NEPA required document. An analysis of alternative actions and their predictable long and short- term environmental effects. The public has 30 days to submit comments on the EA's for timber sales.
Environmental Impact Statement - (EIS)
A NEPA required document. A statement of environmental effects of a proposed action and alternatives to it. A timber sale has an EIS instead of an EA if it occurs in a roadless area or other criteria.
Ephemeral streams
Streams that flow only as the direct result of rainfall or snowmelt. They have no permanent flow.
Even aged management
Timber management actions that result in the creation of stands of trees in which the trees are essentially the same age. This is accomplished by clear cutting.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z