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Published byDonna Evans Modified over 9 years ago
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Measuring Rangelands
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Uplands vs Riparian Vs Wetlands Uplands = Drier areas on landscape that are only wet for short periods after precipitation events.
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Uplands vs Riparian Vs Wetlands Riparain = Vegetation adjacent to surface waters, such as streambanks and shorelines. Greener vegetation because of water sources
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Uplands vs Riparian Vs Wetlands Riparian Categorization: Lotic = associated with flowing water Lentic – associated with standing water.
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Uplands vs Riparian Vs Wetlands Wetlands = Areas with “hydric” soils that are permanently or seasonally saturated by water.
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Vegetation Attributes Plant Species or Type Frequency Density Biomass Cover Structure
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Plant Species or Type Plant Species = genetically unique and closely related plants. Life Form Grasses Grass-likes Forbs Shrubs Trees Jen Peterson K. Launchbaugh
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Frequency How often a plant occurs within a sampled area Proportion (%) of times a plant occurs in the total number of plots examined. Example: If dandelions occur in 2 out of 5 plots examined = Frequency of 40%
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Density Number of individuals per unit area Plants/ft 2 Plants/hectare Etc.
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Biomass Total weight of living organisms, including plants and animals, for a given area Usually expressed as kg/ha or lbs/acre In range assessment refers to just plants, does not usually include weight of animals per area. Determined by clipping and weighing
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Biomass – can vary substantially
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Cover Amount of ground surface covered by vegetation or other objects including: rocks, litter (dead plant matter) moss bare ground Measured with points or plots
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Structure Three-dimentsonal arrangement of a plant community. Relates to: Hiding Cover Thermal Cover Wildland Fuels
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Plant Composition A calculation based on proportions of biomass or cover. Proportion (%) of various plants (or life form) in relation to total plant biomass or cover SpeciesLbs/acComposition Sagebrush15025% Wheatgrass40067% Lupine305% Yarrow203%
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Vegetation Attributes Plant Species or Type Frequency Density Biomass Cover Structure … Composition
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