Question

predator - prey dynamics
thousands of an
1845 1865 1885 1905 1925
time (years)
in a predator prey interaction, as seen by the graph, the populations of the two typically exhibit a cyclical and predictable fluctuation. which explanation best illustrates the interaction of these populations?
a the predators decline in response to a decrease in prey populations, which cause an increase in prey populations in the future.
b the predators increase in response to a decrease in prey populations, which cause a decrease in predator populations.
c the prey migrate to new locations to avoid predators, which causes an increase n predators as there is less competition for food by the prey.
d the prey migrate to new locations to avoid predators, which cause a decrease in predators as they migrate from the community in search of food sources.

Explanation:

The graph shows cyclic fluctuations where prey (hare) peaks precede predator (lynx) peaks. When prey populations decrease, predators lack food, so their numbers decline. This reduced predation pressure then allows prey populations to recover and increase again, restarting the cycle. Option A describes this classic predator-prey dynamic.

Answer:

A. The predators decline in response to a decrease in prey populations, which cause an increase in prey populations in the future.