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Ch 3: The Biosphere
Miller & Levine Biology textbook
| Term | Definition |
|---|---|
| herbivore | organisms that only eat plants |
| photosynthesis | capture light energy into things organisms can use |
| abiotic factor | nonliving parts of an environment |
| autotroph | produce energy from sunlight/chemicals |
| carnivore | organisms that only eat meat |
| consumers | organisms that get energy from another organism |
| chemosynthesis | using chemical energy to create carbohydrates |
| biotic factor | living parts of an environment |
| omnivore | organisms that eat both plants and meat |
| decomposer | organisms that break down dead organic matter then eat them |
| phytoplankton | mixture of floating algae that are aquatic primary producers |
| species | group of similar organisms that can breed/produce offspring |
| ecosystem | all organisms that live together in one physical environment |
| scavenger | organisms that eat dead animals |
| biome | a group of ecosystems with similar climates/organisms |
| ecology | study of interactions between organisms and their physical environments |
| population | groups of the same species and live in the same area |
| detritivore | an animal that directly eats dead organic matter |
| food chain | where organisms transfer energy by eating and by being eaten |
| food web | network of feeding interactions |
| ecological pyramid | show amount of energy/matter contained at each trophic level |
| primary producer | first producers of energy-rich compounds that are later used by other organisms |
| biosphere | life at a global scale |
| trophic levels | each step in a food chain/web |
| biomes | total amount of living tissue within a given trophic level |
| zooplankton | small, swimming animals |
| community | different populations that live in one area |
| heterotroph | get energy from another organism |
| biogeochemical cycle | closed loops where elements pass from one organism to another and among parts of the biosphere |
| nutrient | chemical substances that an organism needs to sustain life |
| nitrogen fixation | process of converting nitrogen gas into ammonia |
| denitrification | a microbial process that converts nitrate (NO3-) into gaseous nitrogen (N2), essentially removing nitrogen from the soil or water |
| limiting nutrient | the nutrient whose supply limits productivity |
Created by:
rassberry60
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