14. The preceding food web represents the feeding relationships in a certain ecosystem. Based on the food web, an increase in the population size of the grasshoppers will most likely result in an increase in the population size of which of the following?
Answer: D
An increase in the population size of the grasshoppers will most likely result in an increase in the population size of the owls.
An increase in grasshopper populations provides more food for owls, which are predators of grasshoppers. Therefore, as the grasshopper population rises, it is expected that the owl population will also increase due to the abundance of available prey.
A) The grasses
An increase in grasshopper populations would not lead to an increase in grasses. In fact, more grasshoppers could result in increased herbivory, potentially harming grass populations rather than supporting their growth.
B) The rabbits
Rabbits may indirectly benefit from an increase in grasshoppers due to potential ecosystem changes, but they do not directly rely on grasshoppers as a primary food source. Thus, their population is unlikely to increase directly as a result of higher grasshopper numbers.
C) The foxes
While foxes are predators, they primarily feed on small mammals and birds rather than insects like grasshoppers. Therefore, an increase in grasshoppers would not significantly affect the fox population, making this option incorrect.
D) The owls
Owls are direct predators of grasshoppers, and a rise in grasshopper numbers provides them with a more abundant food source. Thus, the owl population is expected to increase in response to the increased availability of their prey.
Conclusion
The correct answer is D) The owls, as they directly benefit from an increase in grasshopper populations due to their role as predators. Other options do not exhibit a direct relationship to grasshoppers in the food web context, making them less likely to experience population increases as a result of changes in grasshopper numbers.