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Topic 3/ Ecosystems
| Term | Definition |
|---|---|
| niche | How an organism makes its living and interacts with the biotic and abotic factors in its habitat |
| competition | The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time. |
| Preditation | An interaction in which one organism kills another for food or nutrients |
| Symbiosis | Any relationship in which two species live closely together and that benefits at least one of the species |
| Commensalism | A type of symbiosis between two species in which one species benefits and the other species is neather helped or harmed |
| Mutualism | A type of symbiosis in which both species benefit from living together |
| Parasitism | A type of symbiosis in which one organism lives with, on, or in host and harms it |
| Succession | The series of predictible changes that occur in a community over time |
| Pioneer Species | The first species to populate an area during succession |
| Biodiversity | The number and variety of different species in an area. |
| Keystone Species | A species that influences the survival of many other species in an ecosystem |
| Extingtion | The disappearance of all members of an species from earth |
| Invasive Species | Species that are not native to a habitat and can out-compete native species in an ecosystem. |