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

is a group of individuals that interbreed and produce fertile offspring.

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

all of the populations in a particular area make up a community.

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

The specific environment in which an organism lives is its habitat

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

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

describes the number of individuals within a population per unit area.

Population distribution

sometimes called population dispersion, describes how organisms are arranged within an area.

or age distribution, describes the relative numbers of organisms of each age within a population.

Age structure diagrams

are visual tools scientists use to show the age structure of population.

is its proportion of males to females

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

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 exponential growth

are characteristics of the environment that limit population growth.

is the largest 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 influence changes with population density

Density-independent factor

are limiting factors who's influence is not affected by population density.

maximum ability to produce offspring in ideal conditions

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CH 4 VOCAB

Chapter 4 scientific vocabulary

Term	Definition
Ecology	is the study of how organisms interact with each other and with their environments.
Species	is 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 make up a population.
Community	all of the populations in a particular area make up a community.
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
Habitat	The specific environment in which an organism lives is its habitat
Resource	is anything an organism needs, including nutrition, shelter, breeding sites, and mates.
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	sometimes called population dispersion, describes how organisms are arranged within an area.
Age structure	or age distribution, describes the relative numbers of organisms of each age within a population.
Age structure diagrams	are visual tools scientists use to show the age structure of population.
Sex ratio	is its proportion of males to females
Survivorship curves	to show how the likelihood of death varies with age, population ecologists use graphs
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 exponential growth
Limiting Factors	are characteristics of the environment that limit population growth.
Carrying Capacity	is the largest 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 influence changes with population density
Density-independent factor	are limiting factors who's influence is not affected by population density.
Biotic potential	maximum ability to produce offspring in ideal conditions

Created by: jayleex01

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