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Consider the following statements regarding ecological succession:
- Allogenic succession is driven by the biotic component of an ecosystem.
- Xerarch succession usually takes place in a fresh water body.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements regarding ecological succession: All...
- Allogenic Succession:
(i) Succession that results from factors external to the community is called allogenic succession.
(ii) In allogenic succession, the principal force of change comes primarily from outside the community. Such external forces may include climate change, changes in temperature and other environmental factors, or other types of massive disturbances. Hence statement 1 is not correct.
(iii) Allogenic succession occurs on a time scale which is in accordance or proportionate with the time scale of the disturbance. Allogenic succession resulting from climate change may occur over thousands of years. - Autogenic Succession:
(i) Succession that results from changes brought about by the organisms themselves is called autogenic succession.
(ii) The change from an abandoned agricultural field to a mature forest is an example of autogenic succession.
(iii) In autogenic succession, the principal force of change comes from within the community. Therefore, autogenic succession occurs on time scales commensurate with the life span of the organisms in the community - The ecological succession can be broadly classified into two kinds on the basis of the nature of habitat:
(i) Hydrarch (Hydrosere): A hydrosere is a plant succession which occur in a area of fresh water body such as pond, lakes and marshes.
(ii) Xerarch (Xerosere): Succession takes place in Xeric or dry habit like sand deserts, sand dunes or rocks where moisture is present at minimal amount is known as Xerosere. - Hence statement 2 is not correct
Community Answer
Consider the following statements regarding ecological succession: All...
Ecological succession refers to the process of change in the structure and composition of an ecological community over time. It occurs in response to changes in the physical environment and the interactions between organisms within the community. There are two types of ecological succession: autogenic succession and allogenic succession.
Autogenic succession is driven by the biotic component of an ecosystem, including the interactions between organisms and their environment. This type of succession occurs when the changes in the physical environment are a result of the actions of the organisms themselves. For example, in a grassland ecosystem, the growth and decomposition of plant materials over time can lead to changes in soil fertility and moisture levels, which in turn influence the types of plants that can grow in the area.
Allogenic succession, on the other hand, is driven by external factors such as climate change or geological events. It occurs when the changes in the physical environment are not directly caused by the actions of the organisms within the community. For example, a forest fire or a volcanic eruption can result in the destruction of existing vegetation and the subsequent colonization of the area by new plant species.
Xerarch succession refers to the process of ecological succession that takes place in a dry or arid environment. It is characterized by the colonization and establishment of plant species that are adapted to survive in low moisture conditions. Xerarch succession can occur in various types of ecosystems, including deserts, sand dunes, and rocky areas.
Therefore, considering the statements given in the question:
Statement 1: Allogenic succession is driven by the biotic component of an ecosystem.
This statement is incorrect. Allogenic succession is driven by external factors such as climate change or geological events, not the biotic component of an ecosystem.
Statement 2: Xerarch succession usually takes place in a fresh water body.
This statement is also incorrect. Xerarch succession typically occurs in dry or arid environments, not fresh water bodies.
Since both statements are incorrect, the correct answer is option D) Neither 1 nor 2.
Autogenic succession is driven by the biotic component of an ecosystem, including the interactions between organisms and their environment. This type of succession occurs when the changes in the physical environment are a result of the actions of the organisms themselves. For example, in a grassland ecosystem, the growth and decomposition of plant materials over time can lead to changes in soil fertility and moisture levels, which in turn influence the types of plants that can grow in the area.
Allogenic succession, on the other hand, is driven by external factors such as climate change or geological events. It occurs when the changes in the physical environment are not directly caused by the actions of the organisms within the community. For example, a forest fire or a volcanic eruption can result in the destruction of existing vegetation and the subsequent colonization of the area by new plant species.
Xerarch succession refers to the process of ecological succession that takes place in a dry or arid environment. It is characterized by the colonization and establishment of plant species that are adapted to survive in low moisture conditions. Xerarch succession can occur in various types of ecosystems, including deserts, sand dunes, and rocky areas.
Therefore, considering the statements given in the question:
Statement 1: Allogenic succession is driven by the biotic component of an ecosystem.
This statement is incorrect. Allogenic succession is driven by external factors such as climate change or geological events, not the biotic component of an ecosystem.
Statement 2: Xerarch succession usually takes place in a fresh water body.
This statement is also incorrect. Xerarch succession typically occurs in dry or arid environments, not fresh water bodies.
Since both statements are incorrect, the correct answer is option D) Neither 1 nor 2.
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Consider the following statements regarding ecological succession: Allogenic succession is driven by the biotic component of an ecosystem. Xerarch succession usually takes place in a fresh water body.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?
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Consider the following statements regarding ecological succession: Allogenic succession is driven by the biotic component of an ecosystem. Xerarch succession usually takes place in a fresh water body.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements regarding ecological succession: Allogenic succession is driven by the biotic component of an ecosystem. Xerarch succession usually takes place in a fresh water body.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements regarding ecological succession: Allogenic succession is driven by the biotic component of an ecosystem. Xerarch succession usually takes place in a fresh water body.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?.
Consider the following statements regarding ecological succession: Allogenic succession is driven by the biotic component of an ecosystem. Xerarch succession usually takes place in a fresh water body.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements regarding ecological succession: Allogenic succession is driven by the biotic component of an ecosystem. Xerarch succession usually takes place in a fresh water body.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements regarding ecological succession: Allogenic succession is driven by the biotic component of an ecosystem. Xerarch succession usually takes place in a fresh water body.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?.
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