Population Dynamics

Exponential growth- means that as a population gets larger, it also grows faster.( J-shape) Exponential growth- means that as a population gets larger, it also grows faster.( J-shape) Straight line growth- a steady growth over time. Straight line growth- a steady growth over time.

Carrying capacity- the number of organisms of one species that an environment can support indefinitely. Carrying capacity- the number of organisms of one species that an environment can support indefinitely.

Density-dependent factors are things like competition, parasites, and food. Density-dependent factors are things like competition, parasites, and food. This is a type of limiting factor that is biotic. This is a type of limiting factor that is biotic. Density-independent factors- affect all populations, regardless of their density. Density-independent factors- affect all populations, regardless of their density. This is a type of limiting factor that is abiotic like storms, floods, and droughts. This is a type of limiting factor that is abiotic like storms, floods, and droughts.

Demography Demography is the study of human populations growth characteristics. Demography is the study of human populations growth characteristics.

Birth rate- the rate at which babies are born. Birth rate- the rate at which babies are born. Death rate- the rate at which people die. Death rate- the rate at which people die. If the birth rate is higher than the death rate you have a growth rate. If the birth rate is higher than the death rate you have a growth rate. If the birth rate is less than the death rate you have a population shrinkage (lower total population). If the birth rate is less than the death rate you have a population shrinkage (lower total population).

Age structure graph- shows what percentage of the population falls in what age range. Age structure graph- shows what percentage of the population falls in what age range.

Immigration= into population (I=in) Immigration= into population (I=in) Emigration = out of a population (E=Exit) Emigration = out of a population (E=Exit)

ST. MATTHEW ISLAND

#1 Which of the following factors is density- dependent Which of the following factors is density- dependent a. Drought b. Flood c. Food d. Wind speed

#2 When populations increase, resource depletion may result in _________. When populations increase, resource depletion may result in _________. a. Exponential growth b. Straight-line growth c. Competition d. Increase in predators

#3 Storms, cold temperatures, and drought are all ____________. Storms, cold temperatures, and drought are all ____________. a. Density dependent b. Biotic factors c. Exponential d. Density independent

#4 Between A.D. 1 and A.D. 1650, the world’s population had a major dip because of ___________. Between A.D. 1 and A.D. 1650, the world’s population had a major dip because of ___________. a. Fertility b. Decreased death rate c. Density-independent factors d. Bubonic plague

#5 Which of the following environment would be more likely to have organisms that exhibit fast growth? Which of the following environment would be more likely to have organisms that exhibit fast growth? a. Hot deserts b. Large, deep lakes c. Prairies that often flood d. Tropical rain forests

#6 A female’s fertility rate is the number of offspring she produces _________. A female’s fertility rate is the number of offspring she produces _________. a. In a year b. In a decade c. By age 50 d. Over her lifetime

#7 According to the graph, the growth rate of a housefly population According to the graph, the growth rate of a housefly population a. Increases, then drops suddenly b. Increases, at a steady rate c. Increases rapidly d. Levels off after a certain amount of time

#8 A J-shaped growth curve indicates a population is experiencing____________. A J-shaped growth curve indicates a population is experiencing____________. a. Exponential growth b. Exponential mortality c. Straight line growth d. Slight growth

#9 The highest level at which a population can be sustained is its ____________. The highest level at which a population can be sustained is its ____________. a. Exponential growth b. Carrying capacity c. Limiting factor d. Death rate

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