8.5 Population Ecology Lesson

Population Density

Select the line on the graph that represents:

Type I: Late loss; heavy parental care

Select the line on the graph that represents:

Type II: Constant loss; mortality unaffected by age

Select the line on the graph that represents:

Type III: Early loss; produce lots of offspring at once and many die right away

Dispersion = the spatial distribution of organisms in a population.

Match the correct type of dispersion with the visual below.

Limiting factors = Aspects of the environment that limit the size a population can reach. ​

• Limiting factors can be biotic or abiotic

Limiting Factors​

The graph below shows information about the growth of a population.

Which best explains what occurred at point X on the curve?

The graph shows the populations of two species of ants. Ants of species 2 have a thicker outer covering that helps prevent excessive evaporation of water and keeps them cool and hydrated.

Which statement would best explain the population changes in the graph?

In the 1930s, the Red Imported Fire Ant was accidentally introduced into the United States. This species is native to South America, but has thrived in the United States because of a lack of natural enemies here. Which of the following best explains how the Red Imported Fire Ant has affected native ant species in the U.S. that do have predators?

Scientists that study the effects of global warming predict that a change in Earth's average temperature of even a few degrees will have dramatic effects. One consequence of global warming is the melting of the polar ice caps, which will in turn affect polar bears that use sea ice as a platform for hunting seals. What will most likely happen to the population of polar bears as a result of global warming?