Items starting with S

Second Growth

Forest growth that was established after some kind of interference with the previous forest crop, such as cutting, fire, or insect attack.

Sediment (sedimentation)

Solid materials, both mineral and organic, in suspension or transported by water, gravity, ice, or air; may be moved and deposited away from their original position and eventually will settle to the bottom.

Seed tree cutting

The cutting of all trees except for a small number of widely dispersed trees retained for seed production and to produce a new age class in a fully exposed microenvironment. Seed trees may or may not be removed after regeneration becomes established.

Seismic Exploration

Seismic exploration remains the most common way to locate sub-surface resources. The process involves sending sound waves into the earth at one point and recording them at others after having passed through differing geological strata. There are two common methods utilized today. One method involves the detonation of small explosive charges. The other method consists of a truck that drops a huge weight at various intervals. The data collected is used to show probable sub-surface resource deposits.

Selective cutting

A cutting method that removes only a portion of trees in a stand.

Semi-Primitive Motorized (SPM)

A definition used in the Recreation Opportunity Spectrum (ROS) to characterize an area that has a predominantly natural or natural- appearing environment of moderate to large size. Concentration of users is low, but there is often evidence of other users. The area is managed in such a way that minimum on-site controls and restrictions may be present, but are subtle. Motorized use is permitted.

Semi-Primitive Non-Motorized (SPNM)

A definition used in the Recreation Opportunity Spectrum (ROS) to characterize an area that has a predominantly natural or natural-appearing environment of moderate to large size. Interaction between users is low, but there is often evidence of other users. The area is managed in such a way that minimum on-site controls and restrictions may be present, but they are subtle. Motorized use is not permitted.

Sense of place

The aesthetic, nostalgic, or spiritual effects of physical locations on humans based on personal, use-oriented or attachment-oriented relationships between individuals and those locations. The meaning, values, and feelings that people associate with physical locations because of their experiences there.

Sensitive Species

Those plant and animal species identified by a Regional Forester for which population viability is a concern, as evidenced by significant current or predicted downward trends in population numbers or density, or by significant current or predicted downward trends in habitat capability that would reduce a species' existing distribution.

Seral

The stage of succession of a plant or animal community that is transitional. If left alone, the seral stage will give way to another plant or animal community that represents a further stage of succession.
Find out about AirMedCare's coverage
Friends of the High Lakes
  • Extreme Terrain Wheels 200 200
  • HomeLight Logo
Find out about Hellwig's sway bars
Find out more about the United Four Wheel Drive Associations
California Four Wheel Drive Association logo
8120 36th Ave.
Sacramento, CA 95824

© 1959- All rights reserved.
California Four Wheel Drive Association, Inc.

Contact

  • Phone:
    916-381-8300
    800-4X4-FUNN
  • E-Mail:
    office@cal4wheel.com