Ecology Quiz 7

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Ecology Quiz 7 - Tigga Kingston

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

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