Changes in Ecosystems Practice

The most likely reason for the change in native species from 2005 to 2009 is ....

• A struggle for resources

• an increase in food availability

• a decrease in predators

Which of the following is the correct

sequence of plant growth for primary

succession?

• Grasses → trees and shrubs →

  bacteria and lichen → mosses

• Bacteria and lichen → grasses →

  mosses → trees and shrubs

• Bacteria and lichen → mosses →

  grasses → trees and shrubs

• Mosses → bacteria and lichen →

  grasses → trees and shrubs

Click on the map to help answer this question: What can we predict about the population of Feral Swine for the year 2016?

• There will be less feral swine in 2016 than there were in 1982.

• There will be more feral swine in 2016 than there were in 2010

• There were fewer feral swine in 2004 than 1982.

• There will be no change in feral swine population.

After a forest fire, an ecosystem would start regrowth through -

• primary succession
• secondary succession
• climax community
• limiting factors

Select the three factors that may have caused this decrease in the rabbit population.

• an increase in the predator population

• an increase in the producer population

• a disease in the rabbit population

• a slight increase in the rainfall

• a decrease in the producer population

Invasive species alter the ecosystem by _____ in number quickly. This leads to _____ food for the native species.

• increasing, less

• increasing, more

• decreasing, less

• decreasing, more

Using the information provided in the graph, which two countries have most likely not developed a reforestation plan?

• Cambodia, because the percentage of forested areas has continually decreased

• Thailand, because the percentage of forested areas has stayed the same

• Myanmar, because the percentage of forested areas has steadily decreased over time

• Philippines, because the percentage of forested areas suddenly decreased and then began to increase

• Vietnam, because the percentages of forested areas has mostly increased

________ succession happens more

quickly because ____________

• Primary, there is no soil.

• Primary, there is soil already.

• Secondary, there is no soil.

• Secondary, there is soil already.

How will the invasive fish species most likely affect the ecosystem?

• It will increase the water quality of the river

• It will decrease the quantity of water in the river

• It will lead to a decrease in native aquatic animals

• It will lead to an increase in native aquatic plants

___________________________________ happens when too many nutrients get into a body of water and cause algae to grow.

• succession

• eutrophication

• biodiversity

• urbanization