ECOLOGY
ECOLOGICAL SUCCESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There’s no difference
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Primary succession has more steps, including formation of soil
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Secondary succession has more steps, including formation of soil
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Primary succession takes place in the aquatic environments, secondary succession takes place in terrestrial ecosystems
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Detailed explanation-1: -Primary succession is a series of community changes that occurs in an entirely new habitat and has never been colonized before. A newly quarried rock face or dunes is an example of primary succession. Secondary succession occurs in an area that is previously colonized but disturbed or damaged habitat.
Detailed explanation-2: -Secondary succession is more common and usually occurs faster than primary succession because the substrate is already present. Secondary succession occurs on a surface where an ecosystem has previously existed. This happens after some sort of disturbance.
Detailed explanation-3: -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-4: -Primary succession occurs after a volcanic eruption or earthquake; it involves the breakdown of rocks by lichens to create new, nutrient-rich soils. The first species to colonize an area after a major disturbance are called pioneer species; they help to form the new environment.
Detailed explanation-5: -Secondary succession is usually faster than primary succession because soil and nutrients are already present due to ‘normalization’ by previous pioneer species, and because roots, seeds and other biotic organisms may still be present within the substrate.