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Ecosystem
Chapter 20 and 21
| Term | Definition |
|---|---|
| community | all the populations of different species living in the same area at the same time |
| population | all the organisms of the same species that live in the same area at the same time |
| endangered species | population that is at risk of extinction |
| extinct species | population that has died out |
| threatened species | population at risk but is not yet endangered |
| consumer | organism that gets energy by eating other organisms |
| habitat | place within an ecosystem where an organism lives |
| niche | what a species does in its habitat to survive |
| predator | organism that survives by hunting |
| producer | organism that gets energy from making its own food |
| food chain | model showing how energy flows in an ecosystem |
| food web | model of energy transfer showing how the food chains a community are interconnected |
| abiotic factor | nonliving thing in an ecosystem |
| biotic factor | living thing in an ecosystem |
| ecosystem | living and nonliving things in a given area |
| detrivores | consumers that feed on dead organisms |
| decomposers | recycle nutrients back to the soil through the ecosystem and carbon dioxide that enters the atmosphere |
| carnivores | eat other animals (consumers) |
| herbivores | feed only on plants (producers) |
| omnivores | feed on producers and consumers |
| autotrophs | organisms capable of making their own food (plant and bacteria) |
| heterotrophs | rely on autotrophs (producers) and consumers for food |
| invasive species | species that causes trouble or threatens the biodiversity of an ecosystem |
Created by:
Christie Williams
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