7.10c

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

• Weeds

• Moss

• Shrubs

• Trees

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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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.

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NGSS.MS-LS2-4

Which statement provides evidence that primary succession is occurring?

• Lichens appear on volcanic rock

• A drought kills some varieties of producers

• Grass emerges in an area devastated by fire

• A population explosion of producers brings new organisms into an established ecosystem

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Ecological succession occurs after a forest fire. Which order accurately depicts the progression of ecological succession in this forest after the forest fire?

• Y, X, W, Z

• Z, W, X, Y

• X, Y, Z, W

• X, Y, W, Z

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A student discovers a large, flat rock where lichens and moss are growing. Which type of succession has the student observed?

• Primary

• Tertiary

• Final

• Reaction

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NGSS.MS-LS2-4

If succession continues, which result could students expect to find if they left a schoolyard microhabitat undisturbed for 50 years?

• The populations of organisms living in the habitat would be larger and more well established

• Biodiversity would decrease in the habitat

• The habitat would no longer be there because microhabitats are not capable of long-term existence

• There would be fewer varieties of organisms living in the habitat

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At which point would pioneer species enter this ecosystem?

• Immediately before hardwood trees

• Immediately before shurbs

• Immediately before perennial plants

• Immediately before annual plants

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NGSS.MS-LS2-4

Which statement describes ecological succession in progress?

• A forest fire destroys several hundred acres of wilderness

• New varieties of tress emerge with an increased number of predators

• Some organisms are forced to migrate because of the environmental stress of a drought

• Decreased number of tree varieties emerge with a decrease in predator populations

Tags

NGSS.MS-LS2-4