A study in Kenya tracked a population of wildebeest over 10 years. The graph showed that the population size fluctuated around 250,000 individuals, despite high birth rates. Which factor is most likely limiting this population?

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Question

A study in Kenya tracked a population of wildebeest over 10 years. The graph showed that the population size fluctuated around 250,000 individuals, despite high birth rates. Which factor is most likely limiting this population?

Accepted Answer

availability of water and grazing land — Award 1 mark for availability of water and grazing land. When a population fluctuates around a stable size despite high birth rates, it indicates the population is at or near carrying capacity, limited by resources such as food, water and space. A is incorrect because unlimited food would allow continued growth. B is incorrect because absence of predators would also allow growth. D is incorrect because competition is present when resources are limited, and this is what maintains the population at carrying capacity.

Answer

lack of competition

Answer

unlimited food supply

Answer

absence of predators

Answer

availability of water and grazing land

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