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Ecology Quiz 7 - Tigga Kingston

### 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.

### 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

### Which of the following statements is/are true?

Population growth in humans was exponential to about 1960, but growth rate has since been decreasing

### The exponential population growth equation can be used for

both populations with overlapping generations, populations experiencing continuous growth and populations with nonpulsed reproduction.

### Occasionally density independent factors can influence populations in a density dependent manner.

true

### 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.

### The maximum sustained annual harvest (maximum sustainable yield) is best predicted by:

K/2 because population growth is greatest when N = K/2

### 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