Changing Ecosystems Quiz 2

A system that remains static over time

A system that changes constantly

A system that operates in a fixed manner

A system that lacks any structure or organization

Rapid recovery and restoration to its original state

Immediate collapse and irreversible damage

Slow predictable change – succession

Complete regeneration within a short period of time

Human intervention

Pollution

Volcano, fire

Deforestation

Conducting surveys to count the number of prairie dogs in the ecosystem.

Analyzing the diet of predators in the ecosystem.

Observing the behavior of prairie dogs in their natural habitat.

By comparing ecosystems where prairie dogs have been lost, and observing changes.

Overhunting by predators

Climate change

Loss of land for farming

Pollution and habitat destruction

Coyotes and owls

Hawks and rabbits

Antelope and flowering plants

Snakes and mice

1. Beaver dams cause upstream flooding, creating deep ponds.

1. Beavers cut down trees to construct dams, allowing more sunlight to reach the forest floor.

1. Beaver dams alter how water flows through an ecosystem.

1. all of the above

Beavers can change an ecosystem by building underground tunnels and burrows.

Beavers can change an ecosystem by consuming large quantities of vegetation.

Beavers can change an ecosystem by building a dam that stops a stream and creates a lake.

Beavers can change an ecosystem by migrating to different areas and introducing new species.

Sediments help regulate the temperature of the coastal waters.

Sediments provide nutrients for marine life.

Sediments help build wetlands that protect the coast from flooding. Their absence leaves some areas in danger.

Sediments contribute to erosion control along the coastline.

It prevents erosion along the riverbanks.

It increases the flow rate of the river.

It decreases the overall water level in the river.

The new path changes the path of sediments, too, sometimes in ways that promote new wetland growth.