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14 Cards in this Set
- Front
- Back
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What is competition between species?
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Two species using the same resource compete if the amount of the resource used by each species reduces the amount available to the other species.
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What is herbivory between species?
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A primary consumer feeding on a plant or other producer. The producer's growth affects the food availablitiy for the herbivore.
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What is predation between species?
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A consumer feeding on another consumer. The numbers and behavior of the prey affect the predator.
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What is parasitism between species?
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A parasite is an organism that lives on or in a host and obtains food from it. The host is always harmed by the parasite.
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What is mutualism between species?
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Mutualists are members of a different species that live together in a close relationship, from which both benefit.
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Define gross production
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the total amount of organic matter produced by plants in an ecosystem.
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Define net production
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The amount of gross production of an ecosystem remaining after subtracting the amount used by plants in respiration
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Define biomass
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The total dry mass of organic matter in organisms or ecosystems
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Net production= ____________ - ____________
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gross production- respiration
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Describe ecological succession
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An ecological succession is a series of changes to an ecosystem, caused by complex interactions between the community of living orgamisms and the abiotic enviornment. As a result, some species die out and others join the community.
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Why is it hard to classify some organisms into trophic levels?
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Because sometimes an organisms belongs to more then one trophic level (parrly in one trophic level and partly in another)
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When an organism belongs in more than 1 trophic level, which level are they classified into?
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They are classified according to its main food source.
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Losses of energy in ecosystems are accompanied by losses of _______________
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biomass
Since energy is lost along trophic levels, higher trophic levles usually contain very small numbers of large organisms with a low total biomass |
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The energy content per gram of food decreases along a food chain. True or False?
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False, the energy content per gram of food remains the same along a food chain.
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