Unit 8 Study Guide - Ecosystems

Ecosystem Study Guide

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Blue Whales feed on​

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.

Dropdown

If blue whale populations decreases, the​

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population would likely increase.

Multiple Choice

If blue whale numbers increase, what will happen to the phytoplankton?

• phytoplankton would increase

• phytoplankton would decrease

• phytoplankton would not change

• phytoplankton would go extinct

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Pollination is a service carried out by ​

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​ ​

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and​

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.

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The more organisms in an ecosystem, the ​

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it will be.

Fill in the Blanks

The arrow in a food web follows the direction of_____________ ___________, or goes from the thing being eaten to the consumer.

Draw

In an ecosystem lizards eat grasshoppers, snakes eat mice, grasshoppers and mice eat grass. Draw the food web.

Multiple Choice

The type of succession that stars from a bare rock.

• primary

• secondary

• tertiary

• basic

Multiple Choice

The type of succession that stars with soil.

• Primary

• Secondary

• Tertiary

Multiple Choice

The first species to enter a disturbed area.

• primary consumers

• pioneer species

• secondary consumer

• primary species

Multiple Choice

Examples of pioneer species after a forest fire.

• large trees

• raccoons

• small grasses and wildflowers

• shrubs and small trees

Match

Match the term to the definition

• primary succession

• secondary succession

• pollinator

• pioneer species

• lichen

the process of community development on a previously uninhabited area

the process of community recovery after a disturbance

an organism that helps in the transfer of pollen

species that colonize previously disrupted or damaged ecosystems

small plants that break down rocks

• the process of community development on a previously uninhabited area

• the process of community recovery after a disturbance

• an organism that helps in the transfer of pollen

• species that colonize previously disrupted or damaged ecosystems

• small plants that break down rocks

Multiple Choice

More diverse ecosystems have ___________ different species.

• fewer

• many

• three

• two

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More diverse ecosystems are generally more​ ​

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to disturbances.

Multiple Choice

In a food web, changes in one population can affect __________.

• the rest of the organisms

• only the producers

• only the apex predators

Drag and Drop

Removing all of the grass affects​

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and​

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consumer populations.

Drag these tiles and drop them in the correct blank above

primary

secondary

pioneer

producer

Multiple Choice

Two ecosystems are compared. Ecosystem A has a biodiversity index of .5 and Ecosystem B has a biodiversity index of .35. Which ecosystem has the greatest biodiversity?

• Ecosystem A

• Ecosystem B

• Both have the same biodiversity

• Neither has greater biodiversity

Multiple Choice

Two more ecosystems are compared. Ecosystem C has 230 different species, Ecosystem D has 115. Which ecosystem is more sustainable?

• Ecosystem C

• Ecosystem D

Fill in the Blanks

Volcanic ash can block sunlight for long periods of time. This would directly affect

in the ecosystem.

Multiple Choice

How does decreases in biodiversity impact ecosystem stability?

• Changes in biodiversity can reduce ecosystem stability.
• Changes in biodiversity can enhance ecosystem stability.
• Biodiversity has no effect on ecosystem stability.

Match

Put the pictures in the correct order of succession.

disturbance

grasses and small plants

shrubs and bushes

climax community

• disturbance

• grasses and small plants

• shrubs and bushes

• climax community

Multiple Choice

In what stage would the pioneer species be found?

• Disturbance

• shrubs and bushes

• climax community

• grasses and small flowering plants

Multiple Choice

Which takes longer, primary or secondary succession?

• Primary Succession

• Secondary Succession

Multiple Choice

What is the order of succession shown in this figure?

• A, B, C, D
• B, A, D, C
• C, D, A, B
• D, A, B, C