Ecological Succession- DOL

A glacier retreats, exposing a previously ice-covered landscape. What events and processes are likely to occur during the early stages of primary succession?

Select TWO that apply.

• A. Lichens and mosses colonize the bare rock surfaces.

• B) Large trees quickly become dominant.

• C) Small grasses establish in the glacial till.

• D) Climax community is established within a few years.

Tags

NGSS.MS-LS2-1

During primary succession, which of the following is the correct sequence of events?

• A.

  Mosses → Shrubs → Grasses → Trees

  
  

• B.

  Lichens → Mosses → Grasses → Shrubs

  
  

• C.

  Shrubs → Trees → Mosses → Lichens

• D.

  Grasses → Trees → Lichens → Mosses

  
  

During ecological succession, how does the growth of young hardwoods affect the organisms living in an ecosystem?

• A. Grasses and low shrubs are unable to obtain the amount of light they need to survive, so there are small numbers of them.

• B. The trees provide shelter and food for a variety of mammals, insects, and birds.

• C. In autumn, falling leaves provide a source of energy for decomposers such as fungi.

• D. All of the previous answers ( A, B, & C)

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What role do pioneer species play in the process of ecological succession?

• D. They prevent other species from establishing in the area.

• A. They modify the environment, making it more suitable for other species to colonize.

• B. They are the final stage of succession, providing stability to the ecosystem.

• C. They compete with climax species for resources.

Which of the following best describes the climax community in an ecological succession?

• A. A community that is constantly changing and evolving.

• B. A stable and mature community with little change in species composition.

• C. A community dominated by pioneer species.

• D. A community that is in the early stages of succession.

How does secondary succession differ from primary succession?

• D. Secondary succession does not involve pioneer species.

• C. Secondary succession takes longer to reach a climax community than primary succession.

• B. Secondary succession begins on soil, whereas primary succession begins on bare rock.

• A. Secondary succession occurs in an area where no life has existed before.