Rewilding Ecosystems

What were megafauna?

• Large dinosaurs that roamed the Earth.

• Great beasts that lived on every continent after dinosaurs went extinct.

• Small, ancient mammals that lived alongside dinosaurs.

• Marine animals that dominated the oceans.

What is a "ghost ecosystem"?

• An ecosystem where all species have gone extinct.

• An ecosystem where surviving animals are adapted to threats from species that no longer exist.

• An ecosystem that only exists in historical records.

• An ecosystem that is completely untouched by human activity.

How can abandoned farms contribute to ecosystem restoration?

• They can be converted into new agricultural land for different crops.

• They can be used to reintroduce extinct megafauna.

• They allow trees and other natural vegetation to return, leading to rewilding.

• They provide new areas for human settlement and development.

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What was a significant impact of reintroducing wolves to Yellowstone National Park?

• It led to an increase in the deer population.

• It caused a decrease in the number of songbirds.

• It transformed the ecosystem by reducing overpopulated deer and allowing vegetation to recover.

• It resulted in a decline in the beaver population.

What is a trophic cascade?

• A process where a change at the bottom of the food chain affects all levels above it.

• A chain reaction in an ecosystem where a change at the top of the food chain tumbles down, affecting every level.

• The gradual decline of an ecosystem due to climate change.

• The process of reintroducing extinct species into an ecosystem.