biodiversity resilience

Which of the following describes what type of species would most likely be a keystone species?

• A species that can harm producers if left unchecked

• A species that allows for the main producers in an ecosystem to thrive

• A species that can easily be replaced in an ecosystem

• A species that has no natural predators

Which statement is true about invasive species?

• Invasive species are usually introduced by humans, and cause the most harm when they have no natural predators and outcompete native species

• Invasive species usually end up in a new ecosystem on their own, and cause the most harm when they have no natural predators and outcompete native species

• Invasive species usually end up in a new ecosystem on their own, and cause the least harm when they have no natural predators and outcompete native species

• Invasive species are usually introduced by humans, and cause the least harm when they have no natural predators and outcompete native species

Which of the following will lead to a more stable ecosystem?

• Loss of a keystone species

• Introduction of an invasive species

• Habitat loss

• Increased biodiversity

Which of the following has the lowest biodiversity?

• Coral Reef

• Tropical rainforest

• A desert

• deciduous forest

Which is an example of how humans create ecosystems with a lower biodiversity?

• A farmer plants nothing but one variety of sweet corn in a field

• Bubba Bob cuts his grass once a week

• A forest is cleared for a new subdivision

• All of these are examples

There are two communities made up of 4 species of trees. The amount of each tree is as follows:

Community 1: 25% tree A, 25% tree B, 25% tree C, 25% tree D

Community 2: 80% tree A, 5% tree B, 5% tree C, 10% tree D

Which has a higher biodiversity?

• The biodiversity is the same for both communities since they both have 4 species of trees

• The biodiversity is higher in community 1 since each species is represented in equal numbers

• The biodiversity is higher in community 2 since most of the trees are of one species

If an introduced species has the same niche as a native species, then

• Both populations will remain stable and not affect each other

• The introduced species will become a keystone species

• The native species will have to outcompete the introduced species to maintain its population

• The introduced species does not have the potential to become invasive

Which statement is true?

• Humans are the only cause of extinctions

• Nonnative species will always become invasive

• A species becomes extinct before it becomes endangered

• An endemic species is a type of native species

Eel grass is sensitive to pollution. It is one of the first organisms to show signs of damage when an ecosystem is polluted. This makes Eel grass a(n) ....

• Indicator Species

• Invasive Species

• Keystone Species

• Endemic Species

The Ring-tailed lemur can only be found on the island of Madagascar. The word that best describes it is

• Invasive

• Endemic

• Extinct

• Indicator