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Ch 18 sec 3 Terms

Chapter 18 Section 3 Terms

TermDefinition
Producer an organism that can make organic molecules from inorganic molecules; a photosynthetic or chemosynthetic autograph that serves as the basic food source in an ecosystem
Chemosynthesis 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 organism
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 animals and plants
Detritivore consumers that feed on the "garbage" of an ecosystem.
Decomposer an organism that feeds by breaking down organic matter from dead organisms; examples include bacteria and fungi
Trophic Level an organism's relative position in a sequence in a sequence of energy transfers in a food chain or food pyramid, examples include producers and primary, secondary, and tertiary consumers.
Food Chain the pathway of energy transfer through various stages as a result of the feeding pattern of the series of organisms
Food Web a diagram that shows the feeding relationships among organisms in an ecosystem
Created by: GarciaC17
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