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Chapter 8

TermDefinition
organism a living thing
habitat an environment that provides everything a specific species need to live, grow and reproduce
biotic factor the parts that were alive at one time in a habitat
abiotic factor the nonliving parts of a habitat
species a group of organisms that can mat and reproduce and their offsrping can as well
population all of the members of one species in an area
community all the different populations in an area
ecology the study of how organisms react with their environment
ecosystem all the living and non living things in an area
birth rate the number of births per 1000 individuals of a certain time period
death rate the number of deaths per 1000 individuals of a certain time period
immigration when an organism moves into a population
emigration when an organism moves out of a population
population density the number of animals in an area of a specific size
limiting factors an environmental factor that cause a population to stop growing
carrying capacity the largest population an area can support
natural selection a characteristic that makes a species better in a specific environment that is passed down through generations
adaption the behaviors and physical characteristics that allow organisms to successfully survive in their habitat
niche the role of an organism in its habitat
competition the struggle of species to survive with the same needs
predation when one organism kills another for food or nutrients
predator the organism doing the killing
prey the organism being killed
symbiosis any relationship between to organisms
mutualism both species benifit
commensalism one is not harmed and one benifits
parasitsm one species benefits and the other is harmed
parasite the organism that benefits from parsitism
host the organism that the parasite lives in or on
succesion the series of predictable changes in a community over time
primary succession succession without soil
secondary succession succession with soil existing
pioneer species the fist species to populate an area
Created by: NathanTheGenius
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