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14 Cards in this Set
- Front
- Back
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decomposer
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breaks down and obtains energy from dead organic matter
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biomass
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total amount of living tissue within a given trophic level
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autotroph
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captures energy from sunlight or chemicals and uses it to produce its own food
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trophic level
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step in a food chain or food web
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ecological pyramid
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diagram that shows relative amounts of energy/matter within each trophic level in a food chain or web
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food chain
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series of steps in an ecosystem in which organisms transfer energy by eating & being eaten
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detritivore
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feeds on plant & animal remains & other dead matter
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photosynthesis
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process by which some organisms use light energy to power reactions resulting in production of carbohydrates
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chemosynthesis
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process by which some organisms use chemical energy to produce carbohydrates
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food web
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network or complex interactions formed by many feeding relationships among various organisms in an ecosystem
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heterotroph
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obtains energy from the foods it consumes
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herbivore
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obtains energy by eating only plants
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carnivore
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obtains energy by eating animals
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omnivore
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obtains energy by eating both plants & animals
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