Ecology vocab words
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| a living thing | organism
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| an environment that provides the things an organism needs to live, grow, and reproduce | habitat
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| a living part of an organism's habitat | biotic factor
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| a nonliving part of an organism's habitat | abiotic factor
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| the process in which organisms use water along with sunlight and carbon dioxide to make their own food | photosynthesis
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| a group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce | species
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| all members of one species in a particular area | population
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| all the different populations that live together in an area | community
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| the community of organisms that live in a particular area, along with their nonliving surroundings | ecosystem
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| the study of how living things interact with each other and their environment | ecology
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| an approximation of a number, based on reasonable assumptions | estimate
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| the number of births in a population in a certain amount of time | birth rate
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| the number of deaths in a population in a certain amount of time | death rate
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| moving into a population | immigration
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| leaving a population | emigration
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| the number of individuals in an area of a specific size | population density
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| an environmental factor that causes a population to decrease | limiting factor
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| the largest population that an area can support | carrying capacity
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| a process by which characteristics that make an individual better suited to its environment become more common in a species | natural selection
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| a behavior or physical characteristic that allows an organism to live successfully in its environment | adaptations
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| the role of an organism in its habitat, or how it makes its living | niche
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| the struggle between organisms to survive as they attempt to use to same limited resource | competition
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| an interaction in which one organism kills another for food | predation
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| the organism that does the killing in a predation interaction | predator
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| an organism that is killed and eaten by another organism | prey
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| a close relationship between two species that benefits at least one of the species | symbiosis
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| a relationship between two species in which both species benefit | mutualism
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| a relationship between two species in which one species benefits and the other is neither helped nor harmed | commensalism
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| a relationship in which one organism lives on or in a host and harms it | parasitism
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| the organism that benefits by living on or in a host in a parasitism interaction | parasite
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| the organism that a parasite lives in or on a parasitism interaction | host
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| the series of a predictable changes that occur in a community over time | succession
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| the series of changes that occur in an area where no soil or organisms exist | primary succession
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| the first species to populate an area | pioneer species
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| the series of changes that occur in an area where the ecosystem has been disturbed, but where the soil and organisms still exist | secondary succession
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