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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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

Eco Evo Exam 3(c.12)


Demography The study of populations.
Growth rate In a population, the number of new individuals that are produced in a given amount of time minus the number of individuals that die.
Intrinsic growth rate (r) The highest possible per capita growth rate for a population.
Exponential growth model A model of population growth in which the population increases continuously at an exponential rate.
J-shaped curve The shape of exponential growth when graphed.
Geometric growth model A model of population growth that compares population sizes at regular time intervals.
Doubling time The time required for a population to double in size.
Density independent Factors that limit population size regardless of the population's density.
Density dependent Factors that affect population size in relation to the population's density.
Negative density dependence When the rate of population growth decreases as population density increases.
Positive density dependence When the rate of population growth increases as population density increases. Also known as inverse density dependence or the Allee effect.
Self-thinning curve A graphical relationship that shows how decreases in population density over time lead to increases in the size of each individual in the population.
Carrying capacity (K) The maximum population size that can be supported by the environment.
Logistic growth model A growth model that describes slowing growth of populations at high densities.
S-shaped curve (sigmoidal curve) The shape of the curve when a population is graphed over time using the logistic growth model.
Inflection point The point on a sigmoidal growth curve at which the population achieves its highest growth rate.
Age structure In a population, the proportion of individuals that occurs in different age classes.
Life tables Tables that contain class-specific survival and fecundity data.
Stable age distribution When the age structure of a population does not change over time.
Generation time (T) The average time between the birth of an individual and the birth of its offspring.
Cohort life table A life table that follows a group of individuals born at the same time from birth to the death of the last individual.
Static life table A life table that quantifies the survival and fecundity of all individuals in a population during a single time interval.
Created by: BriawnaW



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:
restart all cards