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4 Cards in this Set
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- Back
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What is a producer?
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A photosynthetic organism that manufactures organic substances using light energy, water and carbon dioxide
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What is a consumer?
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Organisms that obtain their energy by feeding on (consuming) other organisms. Those that eat producers are PRIMARY CONSUMERS, those that eat primary consumers are SECONDARY CONSUMERS, etc.
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What is a trophic level?
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The position of an orgnaism on a food chain
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Most animals do not rely on a single food source (problem with food chains), but what's wrong with food webs?
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Their complexity. Nettles may be eaten by 20 different organisms. It is likely that all organisms within a habitat will be linked to others in the food web. CHarting the inter-relationships of thouseands of species is not feasible. Also, relationships change depending on the timer of year, age and population size of the organisms
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