Question

Part 1: Ecosystems

A student studies how populations in a kelp forest ecosystem off the coast of California are affected by changes in
their food sources. The two graphs show that a change in a population of perch, a type of fish, also affects a
population of sea otters.
Population
Perch Population.
Change
Time
Kelp
Sea urchin
Population
The diagram shows a partial food web for the kelp forest ecosystem.
Sea Otter
Population Change
Perch
Partial Food Web
Sea otter
Time
Orca

Answer 1

Its the one with the animal

Answer 2

The graphs and the partial food web show that the population of sea otters is affected by changes in the population of perch, which in turn is affected by changes in the populations of sea urchins and kelp.

Step-by-step explanation:

The two graphs show that a decrease in the population of sea urchins leads to an increase in the population of kelp, which in turn leads to an increase in the population of perch. The increase in the population of perch results in a decrease in the population of sea otters. This is because perch are a major food source for sea otters.

The partial food web shows the interconnectedness of the different species in the kelp forest ecosystem. Sea otters feed on perch, while perch feed on sea urchins. Sea urchins feed on kelp. If there are fewer sea urchins, there will be more kelp. If there is more kelp, there will be more perch. And if there are more perch, there will be fewer sea otters. This illustrates how changes in one population can have cascading effects throughout an ecosystem.