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

Is a group of individuals that interbreed and produce fertile offsprings

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 organisms that are living or used to be living

Parts of an organisms that have never been living

The specific environment in which an organisms lives

A habitat provides an organism with its resources

Describes the number of individuals organisms presents in a given population at a given time

Describes the number of individuals within a population per unit area

Population Distribution

Describes how organisms are arranged within an area

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 populations

is a proportion of males to females

It's a states of death varies with age, population ecologists use graphs

Is the arrival of individuals moving into or out of a population

Is the departure of individuals from a given area

Is seasonal movement into and out of an area

A population increases by a fixed percentage each year

Are characteristics of the environment that limit population growth

Is the largest population size a given environment can sustainably support

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

Density-dependent factors

A recall that high population density increases competition for resources such as food and water.

Density-independent factors

Are limiting factors whose influence is not affected by population density

Limiting factors from an organism's environment provide half the story of population regulation.

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Chapter 4

Term	Definition
Ecology	is the study of how organisms interact with each other and with their environment.
Species	Is a group of individuals that interbreed and produce fertile offsprings
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 organisms that are living or used to be living
Abiotic Factors	Parts of an organisms that have never been living
Habitat	The specific environment in which an organisms lives
Resources	A habitat provides an organism with its resources
Population Size	Describes the number of individuals organisms presents in a given population at a given time
Population Destiny	Describes the number of individuals within a population per unit area
Population Distribution	Describes how organisms are arranged within an area
Age structure	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 populations
Sex ratio	is a proportion of males to females
Survivorship curves	It's a states of death varies with age, population ecologists use graphs
Immigration	Is the arrival of individuals moving into or out of a population
Emigration	Is the departure of individuals from a given area
Migration	Is seasonal movement into and out of an area
Exponential Growth	A population increases by a fixed percentage each year
Limiting Factors	Are characteristics of the environment that limit population growth
Carrying Capacity	Is the largest population size a given environment can sustainably support
Logistic Growth	describes how a population's initial exponential increase slowed and finally stopped by limiting factors
Density-dependent factors	A recall that high population density increases competition for resources such as food and water.
Density-independent factors	Are limiting factors whose influence is not affected by population density
Biotic Potential	Limiting factors from an organism's environment provide half the story of population regulation.

Created by: roselynguzman

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