What is the difference between an introduced and an invasive species?(1 point)

Question

Responses

An introduced species is new to the ecosystem; an invasive species has been there a long time.
An introduced species is new to the ecosystem; an invasive species has been there a long time.

An introduced species is not necessarily harmful to the environment; an invasive species has a negative effect.
An introduced species is not necessarily harmful to the environment; an invasive species has a negative effect.

An introduced species is brought in on purpose; an invasive species is brought in by accident.
An introduced species is brought in on purpose; an invasive species is brought in by accident.

An introduced species is added in by humans; an invasive species enters new ecosystems on its own.

What is species richness?(1 point)
Responses

the number of species in a community
the number of species in a community

the combined total of all individuals of each species in an ecosystem
the combined total of all individuals of each species in an ecosystem

the different types of species in an ecosystem
the different types of species in an ecosystem

the population size of each species in a community
Due to climate change, places that used to be colder are now warming up, allowing new invasive species to establish themselves. What is one way that warming conditions are beneficial to invasive species?(1 point)
Responses

Warm weather allows animals to travel farther and longer because they do not need to hibernate for winter.
Warm weather allows animals to travel farther and longer because they do not need to hibernate for winter.

Warming leads to longer life spans for the animals because none die due to exposure to the cold.
Warming leads to longer life spans for the animals because none die due to exposure to the cold.

There is more food and shelter available since the growing season is year round.
There is more food and shelter available since the growing season is year round.

If the location used to be too cold for non-native species, it is now warm enough to allow them to exist.
The Cuban treefrog invaded Florida in the 1930s and has since spread throughout the southeastern U.S. It produces a “grating squawk” as a mating call. Their call drowns out the mating calls of native frogs, hindering their ability to find a mate. Some frogs, like the Green treefrog, changed their calls, but this also may reduce their ability to attract a mate if females do not learn to recognize the new call.

How does the Cuban treefrog cause a reduction in biodiversity?(1 point)
Responses

It reduces biodiversity because it reproduces rapidly.
It reduces biodiversity because it reproduces rapidly.

It reduces biodiversity by reducing food availability for native species.
It reduces biodiversity by reducing food availability for native species.

It reduces biodiversity because it has no natural predators in the area.
It reduces biodiversity because it has no natural predators in the area.

It reduces biodiversity by reducing successful mating in native species.

Humans built dams, dikes, and levees to control water flow and flooding in the Florida Everglades. This allowed us to expand urban and agricultural areas, but it also allowed invasive species to take over and destroy habitat for native species, as well as reducing native species ability to move to find resources and reproduce. Restoration efforts are under way to allow for natural water drainage and to treat the water.

Which size impact does this human-led destruction of habitat have?

(1 point)
Responses

Large because it has led to several significant changes, including new invasive species and loss of natives.
Large because it has led to several significant changes, including new invasive species and loss of natives.

Small because they are restoring the original hydrology by removing interior canals.
Small because they are restoring the original hydrology by removing interior canals.

Medium because only some species were affected by the changes.
Medium because only some species were affected by the changes.

Medium because many species were impacted, but they are still surviving in the remaining areas.
Medium because many species were impacted, but they are still surviving in the remaining areas.
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Answer 1

Here are the answers to the questions based on the information provided:

1. What is the difference between an introduced and an invasive species?

   • Correct Answer: An introduced species is not necessarily harmful to the environment; an invasive species has a negative effect.

2. What is species richness?

   • Correct Answer: the number of species in a community

3. What is one way that warming conditions are beneficial to invasive species?

   • Correct Answer: If the location used to be too cold for non-native species, it is now warm enough to allow them to exist.

4. How does the Cuban treefrog cause a reduction in biodiversity?

   • Correct Answer: It reduces biodiversity by reducing successful mating in native species.

5. What impact does this human-led destruction of habitat have?

   • Correct Answer: Large because it has led to several significant changes, including new invasive species and loss of natives.

Please feel free to ask if you have any more questions or need further information!