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APES Ch6 Vocab Lytle
Lytle - APES Ch 6 Vocab
| Question | Answer |
|---|---|
| autotrophs | An organism that produces its own food from inorganic compounds and a source of energy. There are photoautotrophs and chemical autotrophs |
| community-level interactions | When the interaction between two species leads to changes in the presence or absence of other species or in a large change in abundance of other species, then a community effect is said to have occurred. |
| decomposers | Organisims that feed on dead organic matter. |
| ecological community | 1.Conceptual or functional meaning: set of interacting species that occur in same place(sometimes extended to mean a set that interacts in way to sustain life) 2. operational meaning: set of species found in an area, whether or not they are interacting |
| food chains | The linkage of who feeds on whom. |
| food webs | A network of who feeds on whom or a diagram showing who feeds on who. It is synonymous with food chain |
| keystone species | A species, such as the sea otter that has a large effect on its community or ecosystem so that its removal or addition to the community leads to major changes in the abundances of many or all other species. |
| succession | The process of establishment and development of an ecosystem. |
| trophic level | In an ecological community, all the organisms that are the same number of food-chain steps from the primary source of energy. |
| watershed | An area of land that forms the drainage of a stream or river. If a drop of rain falls anywhere within a watershed to become surface runoff, it can flow out only through the same stream. |
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jdlytle
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