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25 terms

Science-Ch. 22 vocab

Mr. Atwood
STUDY
PLAY
Symbiosis
close (in/on/near) relationship between 2 organisms
Mutualism
(+,+)---Both benifit
Commensalism
(+,0)---One organism benifits-no effect on the other
Parasitism
(+,-)---One benefits, and one is harmed (host)
ie: intestinal worm
Predator
Kills to eat
Prey
is killed and eaten
Scavenger
eats dead organisims-usually does not kill for food
Competition
Struggle for resources-between species or within a population
population
all members of a species in an ecosystem
ecosystem
smaller area that is measurable (lake/pond)-may be different than biome
community
all living organisms in an ecosystem
biosphere
area where life occurs of earth
Biome
large geographical area of similar plants and animals(climate driven)-temperaature-precipitation
habitat
where an organism lives (hollow tree)
niche
what an organism does or is. Its role in the ecosystem
ie: coyote-predator
biotic factors
living factors in an ecosystem
abiotic factors
non-livng factors in the ecosystem
population density
the number of individuals in a specific area
birth rate
the number of births in a population in a cartain amount of time
death rate
the number of deaths in a population in a certain amount of time
immigration
moving into a population
emigration
leaving a population
limiting factor
an environmental factor that prevents a population from increasing
carrying capacity
largest population that an environment can support
preditation
an interaction in which one organism hunts and kills another for food