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TermDefinition
ecology the study of how organisms interact with other organisms in their environment
species a group of individuals that interbreed and produce fertile offspring
population a member of species that live in the same area at the same time
community all of the populations in a particular area
ecosystem includes all of the living things and their physical environments within a particular area
biosphere includes all parts of earth that host life
Biotic factors parts of an ecosystem that are living or used to be living
abiotic factors parts of an ecosystem that have never been living
habitat a specific environment in which an organism lives in
resource anything an organism needs
population size describes the number of individual organisms present in a given population at a given time
population density describes the number of individuals within a population per unit area
population distribution how organisms are arranged within an area
age structure describes the relative numbers of organisms of each age within a population
age structure diagram visual tools scientist use to show the age structure of a population
sex ratio male to female
survivorship curves shows three basic types
immigration is the arrival from individuals from an outside given area
emigration departure of individuals from a given area
migration is a seasonal movement into and out of any area
exponential growth when a population increases by a fixed percentage
limiting factors characteristics of the environment that limit population growth
carrying capacity the largest population size given environment can sustainably support
logistic growth describes how a population initials increase is slowed and finally stopped by limiting factirs
density dependent factor its influence changes with population density
density independent factor limiting factors whose influence is not affected by population density
biotic potential maximum ability to produce offspring in ideal conditions
Created by: MRGREEN
 

 



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