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principles of Ecolog
vocabulary
| Term | Definition |
|---|---|
| Biosphere: | portion of earth that supports life |
| Biotic factors | living organisms |
| abiotic factors | nonliving parts of environment |
| examples of biotic factors | trees, fish, amoeba |
| examples of abiotic factors | air, temperature, water,light |
| population | number of organisms of same species in an area |
| biological community | group of species that interact |
| Ecosystem | species and the environment |
| Biome | large region with a specific type of climate |
| Habitat | where organisms live |
| Niche | each organism's role or job |
| Symbiosis | organisms that depend on each other for survival |
| Mutualism | relationship in which both organisms benefit |
| Commensalism | relationship in which one organism benefits and the other neither benefits nor is harmed |
| parasitism | relationship in which one organisms benefits and the other is harmed but not killed |
| Autotroph | organism that captures the sun'e energy and makes it's own food |
| heterotroph | organism that gets energy by consuming other organizms |
| Herbivore | eats plants |
| Carnivore | eats meat |
| omnivore | eats plants and animals |
| Trophic level | each step in a food chain or web |
| Food chain | simple model that shows one path of energy flow |
| Food Web | complex model with many paths of energy flow |
| biomass | total amount of organisms in an area |
| Ecology | study of interactions between organisms and the environment |
| competition | when 2 or more organixms occupy the same niche |
| resources that create competition | mates, food, space, water |
| predator | eats other organisms |
| prey | eaten by other organisms |
| sun | where all energy comes from in the beginning |
| decomposer | breaks down dead organisms |
| pyramid of energy | level of energy available - 90% lost each step in form of heat |
| pyramid of biomass | biomass decreases at each level |
| pyramid of numbers | population decreases each level |
Created by:
cboula
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