Natural Events and Ecological Succession

Primary succession occurs in an area that has:

• soil

• no soil

• some soil

• none of these

___ are the first organisms to colonize an area and begin the process of ecological succession.

• foundational organisms

• introductory organisms

• primary organisms

• pioneer species

What is the main difference between primary and secondary ecological succession?

• Primary begins WITHOUT soil; Secondary begins WITH soil

• Primary is the first state and secondary is the second stage

• Primary builds plant community; secondary builds animal community

• Primary begins WITH soil; Secondary begins WITHOUT soil

What is an example of a disturbance that could bring about secondary succession?

• Humans cut down many trees in a small region

• A volcanic eruption covers a village in lava.

Tags

NGSS.MS-LS2-5

Which is the correct order in primary succession?

• Rocks, Lichens & Mosses, Bushes & Shrubs, Trees
• Lichens & Mosses, Rocks, Trees, Bushes & Shrubs 
• Trees, Bushes and Shrubs, Lichens & Mosses

• Rocks, Grass, Trees, Bushes & Shrubs

During a forest fire most vegetation (plants) burn. Which ecological succession will take place after a forest fire?

• Primary

• Secondary

Tags

NGSS.MS-LS2-4

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

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

As ecological succession progresses, a pioneer community gradually changes into a climax community. What typically happens during this process?

• The number of species increases

• The number of species decreases

• The organisms in an area decrease in size

• The organisms in an area can no longer find food

Tags

NGSS.MS-LS2-4

Which of the following types of organisms would be present during the pioneer community stage of ecological succession?

• Lichens and mosses

• Grasses and shrubs

• Small trees and wildflowers

• Tall trees and thick brush

  Which

As an ecosystem transitions from a grassland to a forest, grasses will begin to -

• adapt to life in the forest.

• be replaced by other plants.

• multiply to establish dominance.

• relocate to a nearby grassland.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4