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Questions and Answers
Which of the following is true about primary succession?
Which of the following is true about primary succession?
- It involves pioneer species (correct)
- It occurs in areas with pre-existing soil
- It is faster than secondary succession
- It occurs after a disturbance in a previously colonized area
Which of the following is NOT a factor that influences the process of plant succession?
Which of the following is NOT a factor that influences the process of plant succession?
- Soil type
- Climate
- Topography
- Plant species diversity (correct)
What is the difference between autogenic and allogenic succession?
What is the difference between autogenic and allogenic succession?
- Autogenic succession is a type of secondary succession, while allogenic succession is a type of primary succession
- Autogenic succession is driven by abiotic factors, while allogenic succession is driven by biotic factors (correct)
- Autogenic succession involves the replacement of one plant community by another, while allogenic succession involves the gradual modification of an existing community
- Autogenic succession is driven by biotic factors, while allogenic succession is driven by abiotic factors
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Study Notes
Primary Succession
- Primary succession occurs in areas where no soil or vegetation existed before, such as after a volcanic eruption or in a newly formed delta.
- It begins with the establishment of pioneer species, such as lichens and mosses, which are able to survive in harsh conditions.
Factors Influencing Plant Succession
- Climate, topography, and soil type are factors that influence the process of plant succession.
- Human activities, such as deforestation and land use, can also impact plant succession.
- Not a factor that influences plant succession: the presence of a particular species of bird.
Autogenic and Allogenic Succession
- Autogenic succession is driven by changes within the ecosystem itself, such as the accumulation of organic matter or the creation of shade.
- Allogenic succession is driven by external factors, such as changes in climate or the introduction of new species.
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