Q5.4. What dramatically changes when Starfish are removed from the simulated sys

Question

Q5.4. What dramatically changes when Starfish are removed from the simulated system? O Only minor changes occur to the system. O Nori Seaweed and Black Pine populations increase in size The community becomes dominated by mhussels O The Acorn Barnacle population increases in size Q5.5. Which of the following is NOT an essential characteristic of a keystone species? O A relatively low abundance compared to other species in the community Removal of the species leads to a large change in the community O Direct interaction (through competition or predation) with every other species in the community 0 A high impact on the community relative to its population size.

Explanation / Answer

Q5.4)

Starfish are echinoderms with powerful hunting skills.

They eat mollusks,clams,mussels.

In a simulated system, if starfish are removed their primary food source mussels are left unchecked.

So there is wide increase in the mussel population.

So the answer is community is dominated by mussels.

Q5.5)

Keystone speices is a creature that plays a crucial role in ecosystem.

The presence of single species that controls the community structure,though they are relatively less in number.their removal drastically affects the structure of community.

So the answer is DIRECT INTERACTION with every other species in the community, as direct interaction is not needed.

Just their presence can indirectly affect other species.

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