Columbia River Wildlife Mitigation Habitat Evaluation Procedures Report / Scotch Creek Wildlife Area, Berg Brothers, and Douglas County Pygmy Rabbit Projects. Page: 48 of 115
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Erosion: Detachment and movement of soil or rock fragments by wind, water, ice, and
gravity.
Evaluation Species: Species chosen to represent general habitat types and habitat
requirements of wildlife using those habitats.
Evergreen Cover: Trees or shrubs which maintain leaves all year (conifers, sagebrush,
etc.).
Forage: The edible vegetation produced seasonally or annually in a given area that is
consumed by wildlife and livestock.
Foraging Area: Feeding areas that are regularly used by individuals or groups of animals.
Guild: A group of wildlife species that share common habitat requirements/ecological
characteristics.
Habitat: The natural environment of a plant or animal.
Habitat Area: A sub unit of a Wildlife Area i.e., the Tunk Habitat Area is a sub unit of the
Scotch Creek wildlife Area.
Habitat Evaluation Procedure (HEP): Ecological based procedure that describes habitat by
a set of measurable habitat variables important to the evaluation species. The value of an
area to a given species is the product of-the size of the area times the quality of the area for
that species or Habitat value = Habitat quantity x Habitat quality.
Habitat Suitability Index (HSI): The numerical value of habitat quality expressed in index
form from 0 to 1 .O whereas 0 is the lowest habitat quality measurement and 1 .O is optimum
habitat.
Habitat Units (HUs): The HSI x Area = HU, or one HU is equal to one acre of optimum
habitat for a given species.
Herbaceous: A class of vegetation dominated by non-woody plants known as herbs
(graminoids, forbs and ferns).
Herb: Non-woody vascular plants such as grasses, grass-like plants and forbs.
Historic: Refers to that period of time for which written records exist.
Hydrophyte: A plant which has evolved with adaptations to live in aquatic or very wet
habitats, e.g. cattail, water lily, etc.
Lek: An assembly area where sage and sharp-tailed grouse engage in courtship behavior.
Life Requisite: Food, water, cover, reproductive, or special requirements of an evaluation
species supplied by its habitat.42
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Ashley, Paul R. Columbia River Wildlife Mitigation Habitat Evaluation Procedures Report / Scotch Creek Wildlife Area, Berg Brothers, and Douglas County Pygmy Rabbit Projects., report, January 1, 1997; Olympia, Washington. (https://digital.library.unt.edu/ark:/67531/metadc703292/m1/48/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.