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

Question

Responses

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

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

Answer 1

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

This distinction highlights that while both terms refer to species that are not native to a given ecosystem, not all introduced species have detrimental impacts, whereas invasive species are characterized by their ability to spread rapidly and cause harm to the environment, economy, or human health.

Answer 2

What is species richness?(1 point)
Responses

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

the population size of each species in a community
the population size of each 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

Answer 3

The correct answer is: the number of species in a community.

Species richness refers to the count of different species present in a particular ecological community, regardless of their abundance.

Answer 4

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.

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

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

Answer 5

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

Warming conditions enable non-native species that previously could not survive in colder climates to establish themselves, potentially leading to invasive populations in those areas.

Answer 6

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

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

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.

Answer 7

The correct answer is: It reduces biodiversity by reducing successful mating in native species.

The Cuban treefrog's mating call interferes with the calls of native frogs, making it harder for them to find mates and potentially leading to a decline in their populations, which contributes to a reduction in biodiversity.

Answer 8

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

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 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.

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.

Medium because only some species were affected by the changes.

Answer 9

The correct answer is: Large because it has led to several significant changes, including new invasive species and loss of natives.

The human-led destruction of habitat through the construction of dams, dikes, and levees has had a major impact on the ecosystem, leading to the introduction of invasive species and the decline of native species, which represents a significant alteration of the natural environment.