The Alaska Vegetation Classification - Alaska Geobotany Center ...

Revegetation-The reestablishment or improvement of a plant cover. May takeplace naturally through reproductive processes of the existing flora or be inducedby humans through seeding or transplanting.Riparian-Pertaining to streamside environment.Saline-Pertaining to soil or water containing sufficient soluble salts to interferewith normal plant growth.Sand-As a soil separate, individual rock or mineral fragments from 0.05 to2.0 millimeters (0.002 to 0.08 in) in diameter. Most sand grains consist of quartz.As a soil textural class, a soil that is 85 percent or more sand and no more than10 percent clay.Sandstone-Sedimentary rock containing dominantly sand-size particles.Saprophyte-A plant incapable of synthesizing its nutrient requirements frominorganic sources and that obtains food from dead or decaying organic material.Scree-Sheet of coarse rock debris mantling a mountain slope. Whereas talus isan accumulation of rock material at the base of a cliff, scree includes loose materiallying on slopes without cliffs.Scrub(1) Woody vegetation predominantly of shrubs, ranging between 0.2 meter(8 in) and 3 meters (10 ft) in height; (2) in the Alaska vegetation classification,treeless vegetation (or with less than 10 percent tree crowns) and with shrubscomprising 25 percent or more of the absolute crown cover.Dwarf shrub scrub-ln the Alaska vegetation classification, scrub vegetation thatis less than 20 centimeters (8 in) tall and with 25 percent or more crown cover indwarf shrubs. If tall or low shrubs are present, their combined cover should beless than25 percent.Dwarf tree scrub-ln the Alaska vegetation classification, vegetation with 10 percentor more crown cover in dwarf trees that will not achieve heights of 3 meters(10 ft) at maturity on those sites.Low shrub scmb-ln the Alaska vegetation classification, scrub vegetation lessthan 1.5 meters (5 ft) in height and with 25 percent or more crown cover in shrubs.Scrublanbln the Alaska vegetation classification, landscape occupied by scrubvegetation or capable of growing shrubs.Sedge-A plant in Cyperaceae, grasslike in appearance, but with solid stems thatare triangular in cross section.Sedimentary rock-Rock made of particles deposited from suspension in water. Thechief types of sedimentary rock are conglomerate, formed from gravel; sandstone,formed from sand; shale, formed from clay; and limestone, formed from soft massesof calcium carbonate.Seral-Nonclimax; that is, a species or a community demonstrably susceptible toreplacement by another species or community, usually within a few decades or a fewcenturies at most.272