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

The correct response is:

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

Introduced species are those that have been brought into a new ecosystem, typically by human activity. Some of these species can coexist without causing harm. In contrast, invasive species are a subset of introduced species that disrupt the local ecosystem, often outcompeting native species and causing ecological harm.

What is species richness?(1 point)
Responses

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

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

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 number of species in a community

The correct response is:

the number of species in a community.

Species richness refers to the count of different species present in a given ecological community, without considering the abundance of each species.

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

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.

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.

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.

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.

The correct response 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 can create new habitats that were previously unsuitable for invasive species, enabling them to establish populations in these newly favorable environments.

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 by reducing successful mating in native species.
It reduces biodiversity by reducing successful mating in native species.

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

The correct response 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 more difficult for them to find mates, which can lead to a decline in their populations and ultimately reduce biodiversity.

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

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.

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

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

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.

The correct response is:

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

The human-led destruction of habitat in the Florida Everglades has resulted in major ecological shifts, including the introduction of invasive species and the loss of native species, which represents a large impact on the ecosystem.