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Tiger Sharks in Shark Bay

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In Shark Bay, Australia, the tiger shark is an apex predator that feeds on bottlenose dolphins, dugongs, and green sea turtles. The dugongs and green sea turtles eat the bay's seagrass​. The tiger shark population is decreasing due to intense hunting.

With the decrease in the shark population, there is an increase in the dugong and green sea turtle population. The increase in these two populations has reduced the bay's seagrass population.

Which is the BEST description of the Shark Bay ecosystem?

A

The dugong is an indicator species.

B

The seagrass is an exotic species.

C

The tiger shark is a keystone species.

D

The green sea turtle is an invasive species.

E

The bottlenose dolphin is a generalist species.