Population Ecology Exit Ticket

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survivorship curve

Graph showing the number of survivors in different age groups for a particular species.

logistic growth

Growth pattern in which a population's growth rate slows or stops following a period of exponential growth

exponential growth

Growth pattern in which the individuals in a population reproduce at a constant rate

Population density

the number of individuals of a species per unit area or volume

Dispersion

the pattern of spacing among individuals within the boundaries of the population

Population Ecology

Allows scientists to determine the success of a species and its impact on the surrounding ecosystem

age structure or population profile

the percentage of the population that are particular age ranges (2% are age 2-4)

death rate

The number of deaths in a population in a certain amount of time

birth rate

The number of offspring born in a particular amount of time

(B + I) - (D + E)

a countries' growth rate

a map showing everywhere you can find meadow larks in North America

example of a range

50 coyotes in a mile

example of population density

predation, communicable diseases, starvation, parasites

examples of density dependent limiting factors

natural disasters, human disturbances, unusual weather

examples of density independent limiting factors

Nf = rNi

exponential growth rate equation

r

the symbol for growth rate

carrying capacity

found right at the top of a logistic growth curve

limiting factor

general term describing an event/organism that reduces a population's size

density independent limiting factors

limiting factor that affects all populations in similar ways, regardless of population size

density dependent limiting factors

limiting factors that are affected by the number of individuals in a given area

Nf = r Ni ((K-Ni)/K)

logistic growth equation

N

symbol for population size

geographic distribution

the area inhabited by a species (a.k.a. range)

growth rate

the change in size a population experiences in a given amount of time


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