A pioneer species(1 point)

A pioneer species is the first species in a barren area.

After an extreme disturbance, what is the first thing to form in an ecosystem?(1 point)
Responses

sand
sand

a group of lichens
a group of lichens

rock
rock

the plant community

After an extreme disturbance, the first thing to form in an ecosystem is a group of lichens.

The melting and subsequent retreat of glaciers is a long process that may take centuries. Why is something so slow considered an extreme disturbance?(1 point)
Responses

They strip away trees and destroy everything as they move.
They strip away trees and destroy everything as they move.

They move giant boulders and change the physical shape of the landscape.
They move giant boulders and change the physical shape of the landscape.

They leave behind bare rock with no established ecosystem.
They leave behind bare rock with no established ecosystem.

They will never grow back after they melt.

The melting and subsequent retreat of glaciers is considered an extreme disturbance because they leave behind bare rock with no established ecosystem.

Currently, which event is having the greatest effect on the entire interconnected ocean ecosystem?(1 point)
Responses

plastic pollution
plastic pollution

hurricane
hurricane

oil drilling
oil drilling

tsunami

Currently, the event having the greatest effect on the entire interconnected ocean ecosystem is plastic pollution.

Volcanic eruptions can ___(1 point)
Responses

drastically alter the ecosystem.
drastically alter the ecosystem.

increase biodiversity.
increase biodiversity.

draw animals to the area.
draw animals to the area.

add nutrients to the surrounding soil.

Volcanic eruptions can drastically alter the ecosystem.