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7 Cards in this Set
- Front
- Back
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odd number of trophic levels
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green; plants resource limited; "bottom up" limitation
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even number of trophic levels
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barren; plants consumer limited; "top down" limitation
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bottom up level
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number of energy transfers from fixation of organic carbon to reach level
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top down level
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number of lower levels that are alternatively released and suppressed when this level is removed (plus one)
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trophic level
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functional grouping of organisms according to their primary food source
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reasons food chain theory might not work
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green stuff could be inedible, consumers are co-limited by
predators and food (or other factors), omnivory blurs trophic levels, factors other than consumers or food limit populations |
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keystone species
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a species that consumes and limits the population of another species that would otherwise dominate the system
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