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Ecosystems
| Term | Definition |
|---|---|
| INTERACTION | The direct effect that one kind of organism has on another organism or other non-living thing |
| ORGANISM | A living thing made up of one or more cells and able to carry on the activities of life |
| POPULATION | A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce |
| COMMUNITY | All the different populations that live together in a particular area |
| ECOSYSTEM | The community of organisms that live in a particular area, along with their nonliving environment |
| PREDATOR | The organism that does the killing in a predation interaction |
| PREY | An organism that is killed and eaten by another organism in a predation interaction |
| PRODUCER | An organism that can make its own food. |
| CONSUMER | An organism that obtains energy by feeding on other organisms. |
| ENERGY FLOW | The movement or transfer of energy from one trophic level to the another in an ecosystem |
| FOOD WEB | The pattern of overlapping feeding relationships or food chains among the various organisms in an ecosystem. |
| FOOD CHAIN | A series of events in an ecosystem in which organisms transfer energy by eating and by being eaten. |
| NATIVE SPECIES | Plants and animals that originated and live in an area without any human intervention. |
| INVASIVE SPECIES | Any non-native species that disturbs the ecosystems in which it has been introduced and may harm other living things and the environment. |
| COMPETITION | Competition is an interaction between organisms or species in which both require the same resource in limited supply. |
| SYMBIOSIS | Any type of a close and long-term biological interaction between two different biological organisms |
| MUTUALISM | A type of symbiosis in which both species benefit from living together. |
| COMMENSALISM | A type of symbiosis between two species in which one species benefits and the other species is neither helped nor harmed. |
| PARASITISM | A type of symbiosis in which one organism lives with, on, or in a host and harms it. |
| HOST | The thing that the parasite lives in or on and harms it. |
| BIOTIC FACTOR | A living part of an organism’s habitat. |
| ABIOTIC FACTOR | A nonliving part of an organism’s habitat. |
| CARRYING CAPACITY | The number of people, other living organisms, or crops that a region can support without harming the environment. |
| LIMITING FACTORS | An environmental factor that causes a population to decrease in size. |
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