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30 terms

Ecology Quiz 7

Ecology Quiz 7 - Tigga Kingston
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Logistic population growth produces a __________ population growth curve.
S-shaped
If the age distribution diagram has the smallest concentration of individuals in the bottom portion or is considered to be an urn shape, this indicates that
the population is declining
If the age distribution diagram is bottom heavy or pyramidal in shape, this indicates that the population is
growing rapidly.
Human populations are clumped on a large scale with the greatest concentration in
Asia.
dN/dt = rmaxN represents
exponential population growth.
In the logistic model of population growth if r>0 then
N<K
If the age distribution diagram is bell shaped or the number of individuals in each age class is evenly distributed, this indicates that the population is
stable
Nt = N0 lt represents
geometric population growth
Which of the following are mismatched?
Nt = annual growth rate
The factors that determine carrying capacity include what?
space, disease, food, competition
In a logistic model, when N = K the population stops growing and r = 0
True
Which of the following statements is/are true?
Population growth in humans was exponential to about 1960, but growth rate has since been decreasing
In the most basic terms a population's growth is a function of births and deaths.
True
dN/dt = rmaxN [(K - N)/K] represents
logistic growth
The exponential population growth equation can be used for
both populations with overlapping generations, populations experiencing continuous growth and populations with nonpulsed reproduction.
The best model for population growth of an annual plant like Phlox drummondii is
geometric frowth
Density dependent factors include all of the following except:
volcanoes
Occasionally density independent factors can influence populations in a density dependent manner.
true
'N/K' for a population can represent
environmental resistance
Growth by any population with pulsed reproduction can be modeled as
Nt = N0 lt
Environmental limitation is incorporated into which model of population growth?
both dN/dt = rmaxN [(K - N)/K] and dN/dt = rmaxN [1 -(N/K)]
If the initial population size is 1200 plants and the geometric rate of increase is 2.4177, calculate the population size after eight years for the annual plant Phlox drummondii
1400879
If the age distribution diagram is bottom heavy or pyramidal in shape, this indicates that the population is
growing rapidly
In the logistic model of population growth if N>K then
both r is negative and the population declines.
In the logistic model of population growth if r>0 then
N<K
The maximum sustained annual harvest (maximum sustainable yield) is best predicted by:
K/2 because population growth is greatest when N = K/2
In the most basic terms a population's growth is a function of births and deaths.
truth
Logistic growth has been documented in which of the following populations?
Eurasian collared dove : barnacle, Balanus balanoides: yeast, Saccharomyces cerevisiae: African buffalo (all of the above)
If the age distribution diagram has the smallest concentration of individuals in the bottom portion or is considered to be an urn shape, this indicates that
the population is declining
Growth by any population with pulsed reproduction can be modeled as
Nt = N0 lt