ecology
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35 terms
Terms | Definitions |
|---|---|
 ecology | relation and interaction between organisms and their environment |
| population | all the members of a species in a given area |
| ecosystem | includes a community and their physical environment |
| biosphere | the portion of earth in which life exists |
| stable ecosystem requirement 1 | a constant supply of energy |
| stable ecosystem requirement 2 | photosynthetic or cemosynthetic organisms |
| stable ecosystem requirement 3 | recycling of materials between organisms and the environment |
| abiotic factor 1 | intensity and duration of light |
| abiotic factor 2 | temperature range |
| abiotic factor 3 | amount of moisture |
| abiotic factor 4 | type of substrate |
| abiotic factor 5 | availability of inorganic substances |
| abiotic factor 6 | pH |
| limiting facor | abiotic factors |
| biotic factors | all living things in the environment |
| abiotic factor | non living things |
| saprophytes | plants that feed on dead organisms |
| herbivores | plant-eaters |
| carnivores | meat-eaters |
| predators | hunters |
| prey | hunted |
| scavengers | animals that feed on dead animals |
| omnivore | animals that feed on both plant and animals |
| pyramid of energy | 10% of energy is passed from level to level |
| symbiosis | living together in close relationship |
| parasitism | +,- |
| mutualism | +,+ |
| commensalism | +,0 |
| competition | +,- |
| carbon-hydrogen-oxygen cycle | photosyntesis vs. cellular respiration |
| nitrogen cycle | nitrogen fixing bacteria, nitrifying bacteria, denitrifying bacteria, decay bacteria |
| denitrifying bacteria | goes into air |
| nitrifying bacteria | goes into nodules |
| decay | from dead plants into ground |
| phosphorus cycle | decomposers and plants |
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