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Vocab 18.3

Terms for chapter 18 section 3

producer an organism that can make organic molecules from inorganic molecules; a photosynthetic or chemosynthetic autotroph that serves as the food source in an ecosystem
chemosythesis the production of carbohydrates through the use of energy from inorganic molecules instead of light
gross primary productivity the rate at which organic matter is assimilated by plants and other producers during a period of time over a certain area
biomass any organic material that has been produced in an ecosystem
net primary productivity the rate at which biomass accumulates in an ecosystem
consumer an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources
herbivore an organism that eats only plants
carnivore an organism that eats animals
omnivore an organism that eats a variety of other organisms, including plants and animals
detritivore a consumer that feeds on dead organisms or on the other parts or wastes of other organisms
decomposer an organism that feeds by breaking down organic matter from dead organisms; examples include bacteria and fungi
trophic level an organism's relative porition in a sequence of energy transfers in a food chain or food pyramid, examples include prodcers and primary, secondary, and tertiary consumers
food chain the pathway of eergy transfer through various stages as a result of the feeding patterns of a series of organisms
food web a diagram that shows the feeding relationship among organisms in an ecosystem
Created by: SheaM16