Non-indigenous Species Quiz

Which description best defines a non-indigenous species?

Which reason best explains how a non-indigenous species can reduce biodiversity in a habitat?

Which action is most likely to introduce a non-indigenous species to a local river?

A pond had 12 species of freshwater invertebrates. After a non-indigenous crayfish was introduced, only 7 species were found, even though the total number of invertebrates increased. What does this show about biodiversity in the pond?

A non-indigenous plant pathogen arrives and kills many trees that native insects feed on. What is the most likely effect on those insect populations?

Do all non-indigenous species become invasive and cause harm?

In a pond, tadpoles eat algae. A non-indigenous fish is introduced that eats tadpoles. What is the most likely effect on the algae?

What is the best way to reduce the risk of spreading non-indigenous species between lakes?