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

Ecology test #4

Ecology chapters 10 & 11 vocab

QuestionAnswer
equilibrium a relatively stable population size
population fluctuations a population whose population size rises and falls over time; occur as erratic increases or decreases in abundance, or as deviations from a population growth pattern.
population outbreak caused by the number of individuals in a population that can explode at certain times.
population cycles alternating periods of high and low abundance occur after constant (or nearly constant) intervals of time.
delayed density dependence delays in effect that density has on population size.
damped oscillations which the deviations from carrying capacity gradually get smaller over time
stable limit cycle a pattern where the population exhibits a regular cycle in which it fluctuates indefinitely about the carrying capacity, K.
deterministic predictable changes in the environment
σ standard deviation of the growth rate
inbreeding mating between related individuals; common in small populations.
demographic stochasticity chance events related to the survival and reproduction of individuals.
allee effects occur when the population growth rate (r or λ) decreases as the population density decreases.
environmental stochasticity erratic or unpredictable changes in the environment.
natural catastrophes floods, fires, severe windstorms, or outbreaks of disease or natural enemies; can eliminate or drastically reduce the size of populations that otherwise would seem large enough to be at little risk of extinction.
metapopulation a group of interacting populations that affect one another's dynamics because individuals (or gametes) occasionally disperse from one population to another.
habitat fragmentation something that converts a large habitat into a set of spatially isolated habitat fragments (such as land development).
isolation by distance occurs when patches located far away from occupied patches are less likely to be colonized than are nearby patches
rescue effect the tendency for high rates of immigration to protect a population from extinction (by reducing the problems associated with small population size).
bottom-up control occurs when the abundance of a population is limited by nutrient supply or food availability.
top-down control occurs when the abundance of a population is limited by predators.
Created by: abby.vann
Popular Biology 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