Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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 20 vocab

chapter 20: community ecology

climax community a community that after a process of ecological seccession has reached a generally stable state
commensalism a relationship between two organisms in which one organism benefits and the other one is unaffected
disturbance in ecology an event that changes a community be removing or destroying organisms or altering resource availability
ecological succession a gradual process of change and replacement in a community
interspecific competition a relationship between two species in which both species compete for limited resources such that both species are negatively affected by the relationship
mutualism a relationship between two species in which both species benefit
predation a relationship between two species in which one species the predator feeds on the other species the prey
parasitism a relationship between two species in which on species the parasite benefits from the other species the host which is harmed
primary succession succession that begins in an area that previously did not support life
pioneer species a species that colonizes an inhabited area that starts an ecological cycle in which many other species become established
symbiosis a relationship in which two different organisms live in close association with each other
species richness the number of different species in an area or community
species evenness an measure of the relative abundance of species in an ecological community
species area effect a pattern in which the number of species in an area increases as the area increases
stability the tendency of a community to maintain a relatively constant structure
secondary succession the process by which one community replaces another community that has been partially or totally destroyed
Created by: campbellm19