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Chapter 56

biol 130 exam 2

TermDefinition
ecosystem science study of energy flows and nutrient cycling through communities
ecosystem all organisms in an area and physical + chemical environment
gross primary production total amount of carbon fixed by primary producers in an ecosystem
net primary production amount of biomass incorporated into tissues of producers after respiration
eutrophication process of ecosystem change initiated by an increase in nutrients
consumption efficiency how much plant tissue is consumed
assimilation efficiency amount of consumed food digested v.s. released as feces and urine
bottom-up comes from primary producer level; more npp entering system, more energy is passed up food web
top-down comes from consumer levels; regulates amount of npp by feeding on lower trophic levels
decompositions dead organisms and their waste products are broken down by bacteria and fungi into energy and nutrients
mineralization animals, bacteria, and fungi convert organic compounds into soluble, inorganic nutrients
biogeochemical cycles patterns of movement of elements
pool amount of an element in a given part of the biogeochemical cycle
flux rate at which an element moves between pools
provisioning services food, clean water, timber, fiber
regulating services regulates hurricanes floods, diease, outbreaks, water and air quality
supporting services function in process such as soil formation, carbon sequestration, and nutrient cycling
cultural services nonmaterial benefits, recreational, and aesthetic buildings
sustainability ability to be maintained at a certain rate or level
Created by: acatherine04
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