Multiple Choice
In the context of ecological succession, what is a pioneer species?
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48. Ecology
Introduction to Ecology
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Why does secondary succession occur faster than primary succession in ecological systems?
A
Secondary succession starts with existing soil and nutrients.
B
Secondary succession involves the colonization of barren rock.
C
Secondary succession occurs in areas with higher biodiversity.
D
Secondary succession is driven by human intervention.
Verified step by step guidance1
Understand the difference between primary and secondary succession. Primary succession occurs in lifeless areas where there is no soil, such as after a lava flow or a glacier retreat. Secondary succession occurs in areas where a disturbance has happened but soil and some organisms still exist, such as after a forest fire or hurricane.
Recognize that secondary succession starts with existing soil and nutrients. This is a key factor that allows it to proceed faster than primary succession, which must begin with the formation of soil from bare rock.
Consider the role of existing biodiversity in secondary succession. Since some organisms and seeds may survive the disturbance, they can quickly repopulate the area, speeding up the recovery process.
Evaluate the impact of human intervention. While human activities can influence succession, secondary succession is primarily driven by natural processes that occur after a disturbance.
Conclude that the presence of soil and nutrients, along with surviving organisms, are the main reasons why secondary succession occurs faster than primary succession.
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