Nonnative Species In Aquatic Ecosystems

Question 1

Why does the aquarium trade contribute to the introduction of nonnative species?

Revolt · Accepted Answer

All of the above

Question 2

Why are cane toads in Australia considered an invasive species rather than simply nonnative?

Revolt · Accepted Answer

They are destructive to native species and have no natural predators.

Question 3

Introducing invasive species to an ecosystem results in an increase in biodiversity.

Revolt · Accepted Answer

F

Question 4

Cane toads are highly successful as an invasive species in Australia because there is only one species that is believed to be able to prey on them.

Revolt · Accepted Answer

T

Question 5

Why might it be beneficial to regulate what species of plants and animals people are allowed to own in particular environments?

Revolt · Accepted Answer

Some species might become invasive and destructive if they escaped.

Question 6

Which of the following is true concerning hull fouling from commercial shipping and recreational boating?

Revolt · Accepted Answer

It is difficult to prevent since ship hulls begin, conduct, and end voyages in water.

Question 7

Nonnative species disrupt the natural variability of an ecosystem.

Revolt · Accepted Answer

T

Question 8

Invasive species often unbalance the ecosystems into which they are introduced because _______.

Revolt · Accepted Answer

they did not co-evolve with the natural species and lack natural controls, like predators

Question 9

All nonnative species in an ecosystem are considered invasive species.

Revolt · Accepted Answer

F

Question 10

Why has the spread of the herbicide-resistant hydrilla through Florida’s waterways resulted in them no longer being navigable by most boats?

Revolt · Accepted Answer

The weed clogs propellers that boats use for propulsion.

Nonnative Species In Aquatic Ecosystems Answers