FOREST ECOLOGY
FOREST SUCCESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In 1980, Mt. St. Helen’s volcano erupted. Some areas are still undergoing primary succession where ____
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Thick sediment choked streams
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Light ash covered the rocky ground
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High winds blew down trees
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Lava cooled to form thick layer of rocks
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Explanation:
Detailed explanation-1: -Helens. During historical eruptions of Mount St. Helens, pyroclastic flows have originated from collapsing eruption columns and from gravitational or explosive disruption of growing lava domes.
Detailed explanation-2: -On May 18, 1980, a volcanic eruption obliterated the landscape around Mount St. Helens. Entire forests were mowed down by the blast wave. The land surface was sterilized by heat and noxious gas, and then buried under tens of meters of ash, mud, and rock.
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