Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 4

Population Ecology

TermDefinition
Ecology The study of how organisms interact with each other and with their environment
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 All of the living things and their physical environments within a particular area
Biosphere All parts of Earth that host life, with all their its organisms and environment
Biotic factors Parts of an ecosystem that are living or used to be living
Abiotic factors Parts of the ecosystem that have never been living
Habitat The specific environment in which an organism lives
Resource 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 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 Visual tools scientist use to show the age structure of populations
Sex ratio A populations proportion of males to females
Survivorship curves To show how the likelihood of death varies with age, population ecologists
Immigration The arrival of individuals from outside 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
Limiting factors Characteristics of the environment that limit population growth
Carrying capacity The largest population size a given environment can sustainably support
Logistic growth Describes how a population's initial exponential increase is slow and finally stopped by limiting factors
Density-dependent factor A limiting factor whose influence changes with population density; includes competition, predation, and disease
Density-independent factor A limiting factor whose influence is not affected by population density; includes catastrophic events
Biotic potential The growth rate of a population under ideal conditions
Created by: josh937
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards