Nonnative Species In Aquatic Ecosystems Answers

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1
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Which of the following is an example of chemical control of nonnative species?

A
mowing
B
herbicides
C
net barriers
D
inspections
2
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Nonnative species disrupt ecosystems by _______.

A
increasing biodiversity
B
preventing the spread of disease
C
disrupting food chains
D
increasing the populations of native species
3

What factor determines when a species is considered invasive?

A
It has positive environmental impacts.
B
It is environmentally damaging.
C
It spreads outside its native range.
D
It spreads within its natural range.
4

Explain why the cane toad was a failure as a biological control method in Australia.

Answer not available
5

Since invasive species did not co-evolve with the other species in the ecosystem where they were introduced _______.

A
they can unbalance the ecosystem
B
they are considered a serious environmental problem
C
they lack natural predators to help control their population
D
all of the above
6

Why might it be beneficial for governments to restrict the types of plants and animals that individuals can keep as pets in a particular environment?

Answer not available
7

Explain why the fact that invasive species did not co-evolve with the native species unbalances an ecosystem.

Answer not available
8

Based on California’s experience with Caulerpa, the killer algae, explain why it is important to regulate the pet and aquarium trade.

Answer not available
9

Which of the following is not a reason that nonnative species are reared outside their native ecosystems?

A
They are commercially important.
B
They are used to replace native species.
C
They are used for restocking programs.
D
None of the above
10

As a vector for the introduction of nonnative species, why is hull fouling particularly difficult to combat?

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