Save
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

ENVIRONMENTAL STUDY

CHAPTER 11 - BIODIVERSITY ISSUES

QuestionAnswer
biodiversity a measure of the variety of kinds of organisms present in an ecosystem
extinction the death of a species; the elimination of all the individuals of a particular kind
genetic diversity a term used to describe the number of different kinds of genes present in a population or a species
species diversity a measure of the number of different species present in an area
ecosystem diversity a measure of the number of kinds of ecosystems present in an area
deforestation activities that destroy forests
clear-cutting a forest harvesting method in which all the trees in a large area are cut and removed
patchwork clear-cutting a forest harvest method in which patches of trees are clear cut among patches of timber that are left untouched
reforestation the process of replanting areas after the original trees are removed
selective harvesting a forest harvesting method in which individual high-value trees are removed from the forest, leaving the majority of the forest undisturbed
desertification the conversion of arid and semiarid lands into deserts by inappropriate farming practices or overgrazing
bush meat meat from wild animals
endangered species those species that are present in such small numbers that they are in immediate jeopardy of becoming extinct
threatened species those species that could become extinct if a critical factor in their environment were changed
wilderness designation of land use for the exclusive protection of the area’s natural wildlife; thus, no human development is allowed
cover a term used to refer to any set of physical features that conceals or protects animals from the elements or their enemies
habitat management the process of changing the natural community to encourage the increase in populations of certain desirable species
migratory birds birds that fly considerable distances between their summer breeding areas and their wintering areas
Created by: Jessica C
Popular Earth Science sets

 

 



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