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

a group of individuals that interbreed and produce fertile offspring.

Members of a species that live in the same area at the same time.

All of the populations in a particular area.

includes all of the living things and their physical environments within a particular area.

includes all parts of Earth that host life, with all of its organisms and environments.

parts of an ecosystem that are living or used to be living.

parts of an ecosystem that have never been living are abiotic factors.

the specific environment in which an organism lives.

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

the number of individual organisms present in a given population at a given time.

the number of individuals within a population per unit area.

population distribution

describes how organisms are arranged within an area.

the relative numbers of organisms of each age within a population.

age structure diagrams

visual tools scientist use to show the age structure of populations.

its proportion of males to females.

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

the arrival of individuals from outside a given area.

the departure of individuals from a given area.

a seasonal movement into and out of an area.

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

characteristics of the environment that limit population's growth.

the largest population size a given environment can sustainably support.

describes how a population's initial exponential increase is slowed and finally stopped by limiting factors.

density dependent factor

its influences change with population density.

density independent factor

limiting factors whose influence is not affected by population density.

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chapter 4 vocab 9

Term	Definition
Ecology	is the study of how organisms interact with each other and with their environments.
species	a group of individuals that interbreed and produce fertile offspring.
population	Members of a 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, with all of its organisms and environments.
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 are abiotic factors.
habitat	the specific environment in which an organism lives.
resource	anything an organism needs, including nutrition, shelter, breeding sites, and mates.
population size	the number of individual organisms present in a given population at a given time.
population density	the number of individuals within a population per unit area.
population distribution	describes how organisms are arranged within an area.
age structure	the relative numbers of organisms of each age within a population.
age structure diagrams	visual tools scientist use to show the age structure of populations.
sex ratio	its proportion of males to females.
survivorship curves	to show how the likelihood of death varies with age, population ecologists use graphs.
immigration	the arrival of individuals from outside a given area.
Emigration	the departure of individuals from a given area.
migration	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.
Limiting factors	characteristics of the environment that limit population's growth.
carrying capacity	the largest population size a given environment can sustainably support.
Logistic growth	describes how a population's initial exponential increase is slowed and finally stopped by limiting factors.
density dependent factor	its influences change with population density.
density independent factor	limiting factors whose influence is not affected by population density.
biotic potentials

Created by: gomezbri

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