Exam 55: Population Ecology

Use the following to answer questions : Refer to the graph below, showing the population growth of two different colonies of 65 rabbits each over 10 years. -Which population appears to be regulated by density-dependent factors?

Which of the following is an aspect of population structure studied by ecologists?

The zebra mussel was not found in North America before 1985, yet it is now an abundant pest species in the Great Lakes region and Mississippi River drainage. What principles of species abundance would apply to the explosive increase of the zebra mussel?

If four hundred robins are found in a ten-hectare plot, the density of robins in that plot is _______ robin(s)/ha.

Individuals of a population that are all born at the same time are known as a

In northern forests and tundra, the primary nonhuman predators of large grazing mammals such as reindeer are

Suppose there are 150 female and 100 male baboons in a population. During one time period, 45 babies are born. The fecundity of the population for that time period is _______.

Refer to the graph of age distributions below. For a population that is stable in size, the age distribution of the graph would indicate

According to the logistic equation for population growth, the birth rate equals the death rate when the population size is _______ the carrying capacity.

Suppose seedlings of a plant emit a chemical that reduces the growth of other individuals around them. This would most likely result in the plants having a _______ dispersion pattern.

As an alternative to chemical pesticides, ecologists have often recommended biological control: the introduction of predators or parasites of pests (especially exotic species) to bring an undesirable population under control. What are the risks of this strategy?

Use the following to answer questions : Refer to the graph below, showing the population growth of two different colonies of 65 rabbits each over 10 years. -What type of population growth is occurring in population A? If it is logistic, what is the carrying capacity?

Use the following to answer questions : Refer to the graph below, showing the mortality rate of two species of mammals over the course of 9 months. -Based on the mortality graph, which type of survivorship curve does species B have?

Use the following to answer questions: Refer to the graph below. -The intrinsic rates of increase (r) of species A = 0.25 and of species B = 0.50. According to the graph, the population growth curve for A should be more like curve _______.

For which of the following could population densities be estimated most easily?

Sustainable management of whale populations is generally more difficult than that of fish populations because

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

David Resnick's studies of guppies showed that

The _______ of an environment is the maximum number of individuals of a given species that the environment can support.

Connections between patches in a metapopulation, known as _______, generally _______ the extinction rate of patches.