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Ecology Unit
| Term | Definition |
|---|---|
| organism | a living thing |
| habitat | a place where an organism lives that provides the things it needs to live grow and reproduce |
| biotic factor | the living parts of an ecosystem |
| abiotic factor | the non living parts of an ecosystem |
| photosynthesis | the process used by plants and algae to make their own food |
| species | a group of organisms that are physically similar that can mate with each other and produce offspring that can also mate and reproduce |
| population | all the members of one species in a particular area |
| community | all the different populations that live together in an area |
| ecosystem | all the living and non living things that interact in an area |
| ecology | the study of how living things interact with each other and their environment |
| estimate | an approximation of a number based on reasonable assumptions |
| birth rate | the number of births in a population in a certain amount of time |
| death rate | the number of deaths in a population in a certain amount of time |
| immigration | moving into (joining) a population |
| emigration | moving out of (leaving) a population |
| population density | the number of individuals in a certain area (describes how crowded an area is) |
| limiting factor | an environmental factor that prevents a population from increasing |
| carrying capacity | the largest population that an environment can support |
| natural selection | The series of changes in a population that make organisms better suited to their environment which increases their chances for survival |
| adaptations | behaviors and physical characteristics of a species that allow them to live successfully in their environment (a result of natural selection) |
| niche | an organism's particular role i its habitat |
| competition | the struggle between organisms to survive as they attempt to use the same limited resources |
| predation | an interaction in which one organism kills and eats another organism |
| predator | in predation, the organism that does the killing |
| prey | in predation, the organism that is killed and eaten |
| symbiosis | a close relationship between two species that benefits at least one of the species |
| mutualism | a relationship in which both species benefit |
| commensalism | a relationship in which one species benefits, but the other species is neither helped nor harmed |
| parasitism | a relationship in which one species lives on or in another and harm it |
| parasite | in parasitism, the organism that benefits from the interaction |
| host | in parasitism, the organism the parasite lives on or in (the organism that is harmed in the interaction) |
Created by:
sdix
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