Succession

Stage IV will persist (stay the same) until it is altered (changed) by ______ ?

• the growth in diameter of the trees

• a major change in a biotic & abiotic factors

• the reappearance of lichens and mosses

• seasonal dieback of vegetation

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

A glacier in Alaska has melted back a distance of 100 kilometers over the last 200 years. Four stages in this process are shown in diagrams A, B, C, and D below.  

In which order should the diagrams be placed to represent the ecological succession that has taken place in the area?

• C → D → A → B

• D → C → B → A

• C → D → B → A

• D → C → A → B

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which statement about pioneer species is TRUE?

• Pioneer species require soil to grow.

• Pioneer species are organisms that are made up of only one cell.

• Pioneer species thrive during the early stages of ecological succession.

• Pioneer species, such as hardwood trees, thrive during the final stages of ecological succession.

Deforestation occurs when a lumber company cuts down all the trees on 100 acres of heavily wooded land. What will happen first as the land recovers during ecological succession?

• Breakdown of rock into soil

• Appearance of weeds and grass

• Arrival of squirrels

• Growth of trees

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

A vegetable garden goes unattended for a few weeks. Which organism will be the first to take over the area?

• Weeds

• Moss

• Shrubs

• Trees

It occurs in areas where a community that previously existed has been destroyed by some type of natural disaster or human activity.

• Primary succession

• Secondary succession

An ecological community in which populations of organisms remain stable and exist in balance. It is the final stage of succession, remaining relatively unchanged until destroyed by an event such as a natural disaster or human interference.

What do you call the first organism to inhabit an area during a succession event?

• Pioneer Species

• Climax Community

• Equilibrium

• Shrubs

The type of succession that happens when new land is formed and there is only bare rock on the ground is..

• Primary Succession

• Secondary Succession

• Tertiary Succession

• Producer Succession

The type of succession that occurs after a disruption such as a natural disaster wipes out a previously existing ecosystem?

• Primary Succession

• Secondary Succession

• Tertiary Succession

• Producer Succession