DP Environmental Systems and Societies Questionbank

With reference to Figure 2(a), state the type of biotic interaction that occurs between the imperial amazon and the red-necked amazon parrots.

With reference to Figure 2(b), calculate the percent increase in red-necked amazon numbers between 1980 and 2012.

With reference to Figures 2(a) and 2(b), suggest two reasons why the red-necked amazon population has recovered more quickly than the imperial amazon population following Hurricane David in 1979.

Discuss the role of feedback mechanisms in maintaining the stability and promoting the restoration of plant communities threatened by human impacts.

To what extent is London a sustainable city? 

With reference to Figures 6(a), 6(b) and 6(c), predict how the ecosystem would be affected if the deer population in Richmond Park was not managed.

Outline how this relationship may be of benefit to the populations of both species.

With reference to Figures 9(a) and 9(b), describe one abiotic change and one biotic change in a beaver meadow community undergoing succession.

Distinguish between the terms niche and habitat with reference to a named species.

With reference to Figure 10(b), explain the threats to the future existence of a small and sustainable population of wolves as a result of their protection in limited area.

Identify three reasons why carrying capacity can be difficult to estimate.

Define the term carrying capacity.

With reference to Figure 4(d), suggest the impact on the marine food web if tuna numbers were to decline.

Identify four impacts on an ecosystem that may result from the introduction of an invasive species of herbivore.

Explain how both positive and negative feedback mechanisms may play a role in producing a typical S population growth curve for a species.

Justify whether or not Mesquite should be cleared from the Swakop River Valley.

With reference to the data in Figure 4(b), suggest two conclusions which can be drawn from the camera trap data.

Using Figure 7, state the St Lawrence beluga whale population in 1920 and 1940.

1920:

1940:

Calculate the percent decrease in beluga whale numbers from 1920 to 1940.

Suggest why the St Lawrence River beluga whale population has not recovered despite being given protected status in 1983.

With reference to Figure 9(a), explain why the realized niche of the mottled sculpin has changed in recent years.