IB ESS HL 2.2.15 Food Webs Question Bank

Chocó Toucan would be reduced due to a loss of food/prey;
b. Cicada would increase in population due to reduced predation (by the Mindo harlequin toad);
c. Spectacled bear would increase due to greater availability of its food (Cicada);
d. Cicada/Chirimoya would decrease due to increased predation from the Chocó Toucan;

Note to examiners: Do not accept a general response e.g. food web would collapse/be destroyed/harmed/loss of biodiversity/no change.

Marking guidance:

Do not accept named species (e.g. Chocó Toucan) would die/become extinct (as they have other food sources).
For credit species impacted should be named with direction of change and a cause. Accept any other appropriate response from the food-web figure.