In exponential population growth, r increases as population size increases.
Population growth rates are usually close to r(max).
If r=0.2 for a population, population size is:
decreasing
neither; r does not indicate population growth
increasing
stable
Carrying capacity, or K, is:
variable in time and space
an indicator of fecundity
fixed for each population
a feature of exponential population growth
Logistic population growth is density-dependent.
Population growth rate can be defined as:
change in number of individuals per unit time
the maximum number of individuals a habitat can support
birth rate x death rate
mass gained by individuals per unit time
A hurricane wipes out most of a population of palm trees. This type to limiter of population growth is:
density-dependent
density-independent
negative exponential
logistic
What kind of population growth curve is this?
linear
exponential
parabolic
Exponential population growth is density-independent.
In what type of species would r(max) be highest?
young age-at-maturity, few offspring
young age-at-maturity, many offspring
old age-at-maturity, many offspring
old age-at-maturity, few offspring
What limits growth of hare populations?
predation by lynx
food availability
space
both a and b
none of the above
Which of the following statements about metapopulations is FALSE?
a metapopulation is a population of populations
populations that have gone extinct can be restored
overall population size (summing all patches) is constant
there are 'core' populations that never go extinct
In a metapopulation, there is a balance between extinction and (re)colonization.
Many of the hypotheses that have been developed to explain population cycles (including in hares) involve:
density-dependent factors
density-independent factors
carrying capacity
age-specific factors
Projections for human population growth depend primarily on what factor?
infant mortality rates
overall survivorship
fertility rates in women
disease eradication
Which of the following is TRUE about the current status of the human population?
the population is increasing, but r is decreasing
the population is increasing; r=0.5
the population is increasing, and r is increasing
the population is stable; r (population growth rate) = 0
You are a human demographer, and you see an age pyramid that looks like the figure below. What would you say about this population?
the population is growing rapidly
the population is dominated by people past reproductive age
the population has reached carrying capacity