Question 1

Which of the following best describes the difference between exponential and logistic population growth models?

Accepted Answer

Exponential growth assumes unlimited resources, while logistic growth incorporates limiting factors and carrying capacity.

Question 2

Which dispersion pattern would you most likely observe in a population of penguins nesting on a rocky shoreline, and why?

Accepted Answer

Uniform, because individuals maintain territories and are evenly spaced due to aggressive interactions.

Question 3

In the logistic growth equation $$G = rN \frac{K-N}{K}$$, what happens to the population growth rate $$G as$$ $$N$$ approaches $$K$$?

Accepted Answer

The growth rate $$G$$ approaches zero because the population nears carrying capacity.

Question 4

Which of the following is a density-independent factor that can limit population growth?

Accepted Answer

A severe drought that reduces water availability for all individuals.

Question 5

A population of fish in a lake is being managed for sustainable harvest. According to the logistic growth model, at what population size should managers aim to keep the fish population to maximize sustainable yield?

Accepted Answer

At approximately half the carrying capacity ($$N = \frac{K}{2}).$$

Question 6

Which survivorship curve is characterized by high mortality in early life but high survivorship for those that survive to adulthood, and which type of organism typically exhibits this curve?

Accepted Answer

Type III; many fish and plant species.

Question 7

Which of the following best explains why countries undergoing demographic transition experience rapid population growth even as death rates fall?

Accepted Answer

Birth rates remain high for a period after death rates decline, leading to population momentum.

Question 8

Which of the following is an example of an r-selected life history trait?

Accepted Answer

Producing many small offspring with little parental care in unpredictable environments.

Question 9

A country has an age structure diagram with a broad base and a narrow top. What does this indicate about the country’s population and likely social needs?

Accepted Answer

The population is growing rapidly and will require increased investment in education and jobs for young people.

Question 10

Which of the following best describes the concept of an ecological footprint?

Accepted Answer

The amount of land and resources required to support an individual’s or country’s consumption and waste.

Question 11

If a population of 1,000 birds has a per capita rate of increase $$r = 0.1$$ and a carrying capacity $$K = 2,000$$, what is the population growth rate $$G$$ according to the logistic model $$G = rN \frac{K-N}{K}$$?

Accepted Answer

$$G = 50$$

Question 12

Which of the following scenarios is most likely to result in a clumped dispersion pattern?

Accepted Answer

Termites living in patches of damp, rotting wood.

Question 13

Which of the following factors would most likely decrease the birth rate or increase the death rate as population density increases?

Accepted Answer

Increased competition for limited food resources.

Question 14

Which of the following best explains why boom-and-bust cycles occur in populations such as snowshoe hares and lynx?

Accepted Answer

Interactions between food availability and predation cause dramatic fluctuations in population size.

Question 15

Which of the following statements about carrying capacity ($$K) is $$correct?

Accepted Answer

It is the maximum population size that an environment can sustain indefinitely.

Question 16

A population of deer is experiencing population momentum. Which of the following best explains this phenomenon?

Accepted Answer

The population continues to grow even after the fertility rate drops to replacement level due to a large number of young individuals.

Question 17

Which of the following is a real-world example of a K-selected species?

Accepted Answer

African elephants, which have few offspring and provide extensive parental care.

Question 18

Which of the following best describes the relationship between a population and a species?

Accepted Answer

A population consists of individuals of the same species living in the same area at the same time.

Population Ecology: Structure, Dynamics, and Human Impact

Guida di studio - Domande di pratica

Study guide - Flashcard