Cycles, Succession, Biodiversity Review

A healthy forest ecosystem in the Northwest is home to elk, mule deer, chipmunks, ground squirrels, and a variety of plants. What is the relationship between biodiversity and available resources?

• Biodiversity is not affected by changes to available resources.
• Biodiversity decreases the amount of available resources.
• Biodiversity increases with abundant resources and decreases when resources are scarce.
• Biodiversity decreases with abundant resources and increases when resources are scarce.

Wolves were reintroduced to Yellowstone National Park in 1995. This keystone species restored the park’s ecosystem. What is the ecological value of a keystone species?

• They influence the survival of many other species in an ecosystem.
• They prevent the ecosystem from changing and growing.
• They protect land and water resources within the ecosystem.
• They decrease the number of unwanted species in an ecosystem.

Which words in the word bank belong in "Direct Value?"

• Crops/Raw Materails
• Recreational/Activities
• Shade Trees/Raw Materials

Which words in the word bank belong in "Indirect Value?"

• Recreational Activities/Shade Trees/Wetlands
• Raw Materials/Crops/Wetlands
• Crops/Shade Trees/Wetlands

What is Biodiversity?

• The amount of CO2 in the atmosphere
• The number of different gases in the atmosphere
• The number of different species in an area

Introducing invasive species, removing natural resources, and adding carbon dioxide to the atmosphere are just some examples of a __________ impact to the ecosystem.

• positive
• negative

When an animal is no longer in existence is considered to be

• keystone
• extinct
• biodiverse
• predator

When a pioneer species starts to develop on barren land (nothing present, just dirt and rocks), this is considered to be which type of succession?

• Primary
• Secondary

Bacteria on the ocean floor use chemical energy to make food. This classifies them as

• Consumer
• Producers
• Decomposer

Mushrooms in a forest break down dead trees. This classifies them as

• Consumer
• Producer
• Decomposer