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ES Ch 1 Vocab
| Term | Definition |
|---|---|
| Ecosystem | All the living and nonliving things that interact in an area |
| habitats | the place where an organism lives and that provides the things it needs |
| biotic factor | a living part of an ecosystem |
| abiotic factor | the nonliving part of an ecosystem |
| species | a group of organisms that are similar and reproduce to produce fertile offspring |
| population | all the members of one species in a particular area |
| community | all the different populations that live together in an area |
| ecology | the study of how living things interact with each other and their environment |
| immigration | moving into a populatioin |
| emigration | moving out of a population |
| limiting factors | an environmental factor that prevents a population from increasing |
| carrying capacity | the largest population that an area can support |
| natural selection | Process by which individuals that are better adapted to the environment are more likely to survive and reproduce than others. |
| adaptations | the behaviors and physical characteristics of species that allow them to live successfully in their environment. |
| niche | An organism's particular role in an ecosystem, or how it makes its living. |
| Competition | The struggle between organisms for the limited resources in a habitat |
| Predator | The organism that does the killing in predation |
| Prey | An organism that is killed in predation |
| Symbiosis | A close relationship between species that benefits at least one of the species |
| Mutualism | A relationship between two species in which both species benefit |
| Commensalism | A relationship between two species in which one species benefits and the other i neither helped or harmed |
| Parasitism | A relationship in which one organism lives on or inside another and harms it |
| Parasite | The organism that benefits by living on or in a host in parasitism |
| Host | The organism that a parasite lives in or on in parasitism |