is the study of how organisms interact with each other and with their enviroments.

is a group of individuals that interbreed and produce fertile offsprings

members of species that live in the same area at the same time make up a

includes all of the living thing and their physical enviroments within a particular area

includes all the parts of earth that host life, with all of its organisms and enviroments

parts of and ecosystem that are living or used to be living are called

parts of an ecosystem that have never been alive are

specific enviroment in which an organism lives is its

is anything an organism needs including nutrition, shelter, breeding sites, and mates

describes the number of individuals organisms present in a given population at a given time

describes the number of individuals within the population per unit are

population distribution

sometimes called population dispersion describes how organisms are arranged withing an area

describes the relative number of organisms of each age within a population

age structure diagrams

are visual tools scientist use to show the age structure populations

is its proportion of males to notice that age structure diagrams also give information about sex ratio by providing the relative numbers of males to females in each age group

to show how the likelihood of death varies with age, population ecologists use graphs called

is the arrival of individuals from outside a given area

is the departure of individuals from a given area

is a seasonal movement into and out of an area

when a population increases by a fixed percentage each year, it is said to undergo

all of the population in a particular area make up

are characteristics of the environment that limit population growth

is the largest population size a given enviroment can sustainably support

describes how a population initial exponential increase is slowed and finally stop by limiting factors

maximum ability to produce offsprings in ideal conditions

density dependent factor

because of its influence changes with population density

density independent factors

are limiting factors whose influence is not affected by population density

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chapter 4 words

vocabulary

Term	Definition
ecology	is the study of how organisms interact with each other and with their enviroments.
species	is a group of individuals that interbreed and produce fertile offsprings
population	members of species that live in the same area at the same time make up a
ecosystem	includes all of the living thing and their physical enviroments within a particular area
biosphere	includes all the parts of earth that host life, with all of its organisms and enviroments
biotic factors	parts of and ecosystem that are living or used to be living are called
abiotic factors	parts of an ecosystem that have never been alive are
habitat	specific enviroment in which an organism lives is its
resource	is anything an organism needs including nutrition, shelter, breeding sites, and mates
population size	describes the number of individuals organisms present in a given population at a given time
population density	describes the number of individuals within the population per unit are
population distribution	sometimes called population dispersion describes how organisms are arranged withing an area
age structure	describes the relative number of organisms of each age within a population
age structure diagrams	are visual tools scientist use to show the age structure populations
sex ratio	is its proportion of males to notice that age structure diagrams also give information about sex ratio by providing the relative numbers of males to females in each age group
survivorship curves	to show how the likelihood of death varies with age, population ecologists use graphs called
immigration	is the arrival of individuals from outside a given area
emigration	is the departure of individuals from a given area
migration	is a seasonal movement into and out of an area
exponential growth	when a population increases by a fixed percentage each year, it is said to undergo
community	all of the population in a particular area make up
limiting factors	are characteristics of the environment that limit population growth
carrying capacity	is the largest population size a given enviroment can sustainably support
logistic growth	describes how a population initial exponential increase is slowed and finally stop by limiting factors
biotic potential	maximum ability to produce offsprings in ideal conditions
density dependent factor	because of its influence changes with population density
density independent factors	are limiting factors whose influence is not affected by population density

Created by: william myers

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