FOREST ECOLOGY
FOREST SUCCESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Primary succession results in a climax community, whereas secondary succession results in a destroyed community.
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Primary succession starts with bare rock, whereas secondary succession starts with an already established community of plants.
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Primary succession takes a longer period of time because it begins with bare rock, whereas secondary succession takes a shorter amount of time because it begins with already established soil.
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Primary succession takes a shorter amount of time because it begins with already established soil, whereas secondary succession takes a longer period of time because it begins with bare rock.
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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: -The primary succession occurs following an opening of a pristine habitat, e.g., on lava flow, an area left from retreated glacier, or abandoned mine. The secondary succession is a response to a disturbance e.g., forest fire, tsunami, flood, etc.
Detailed explanation-3: -Primary succession is much slower than secondary succession because it begins where there is no soil. It can take several hundred to several thousand years to produce fertile soil naturally. The first pioneer species to colonize the bare rock will probably be bacteria and lichens, which can live without the soil.