FOREST ECOLOGY
FOREST SUCCESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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before secondary succession, when an environment is fully developed.
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before secondary succession, when the environment is developing.
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after secondary succession, when an environment is fully developed.
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at the same time as secondary succession, when the environment is still developing.
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Detailed explanation-1: -The primary succession takes place in the land where there is no initial vegetation. Primary succession lasts much more time than secondary succession, as it involves time for rock weathering and soil horizon growth. Lichens are the first species to colonize rock that are exposed to the environment.
Detailed explanation-2: -In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.
Detailed explanation-3: -Primary succession begins when no plant life is present on the landscape, such as after a lava flow or glacial retreat. Over centuries, soil forms and deepens and successive communities of plants grow.
Detailed explanation-4: -Secondary succession occurs in areas where a biological community has already existed but some or all of that community has been removed by small-scale disturbances that did not eliminate all life and nutrients from the environment.