Exam 27: Population Growth and Regulation

When mosquitoes are abundant, purple martins flock to the area and feed exclusively on them. When mosquito populations are not large, purple martins are similarly scarce and feed on other insects. This is an example of

Which species has the highest biotic potential?

What is the term for regular population cycles of rapid growth followed by massive die-off?

All members of a species that reside within an ecosystem make up a(n)

Why do many non-native species, such as a prickly pear cactus brought to Australia from South America, rapidly become abundant when first introduced?

Predation is considered a density-dependent factor that controls the population size of prey species. Give two examples of predators acting in density-dependent ways in response to fluctuations in the size of prey populations.

Write an equation that describes a situation in which a population remains stable.

An insect population grows exponentially until an early winter freeze kills almost all of the insects. The next spring, the population grows exponentially again. This type of population growth is called

What factors determine Earthʹs carrying capacity for humans?

Interspecific competition is a density-independent factor.

How do interspecific and intraspecific competition differ?

In countries that have large numbers of children under age 15, the population is

According to the equation for population growth rate, if two populations have the same death rates, then the population with r = 2 will increase more rapidly than a population with r = 4.

Increased population densities and increased competition lead to increased emigration.

The population shown in the pyramid is

A population size will remain stable if

A small country begins to experience stable economic prosperity after centuries of extreme poverty. The government uses the taxes generated for educating all members of the population and creating a comprehensive health care system for all of its citizens. A social security system is established to support elderly members of the population. What demographic changes would you expect to see?

Based on its population pyramid, this population

Based on the data in the table, this population has a_________ growth pattern.

Invasive species can rapidly disrupt an ecosystem because they have a high biotic potential and face little environmental resistance.