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Consider the following statements regarding Ocean acidification.
- Ocean acidification is caused by uptake of carbon dioxide (CO₂) emitted by human activities.
- It brings changes in species dominance, leading to ecosystem shifts in coastal waters.
- Ocean acidification leads to increase in the pH of the ocean over an extended time.
Which of the above statements is/are correct?
- a)1, 2
- b)1, 3
- c)2, 3
- d)1, 2, 3
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements regarding Ocean acidification. Ocean...
Ocean acidification is the process by which the pH of the ocean decreases, making it more acidic. This is primarily caused by the uptake of carbon dioxide (CO2) emitted by human activities such as burning fossil fuels and deforestation. The increased levels of CO2 in the atmosphere are absorbed by the ocean, leading to a decrease in pH.
Statement 1: Ocean acidification is caused by uptake of carbon dioxide (CO2) emitted by human activities.
This statement is correct. Human activities, particularly the burning of fossil fuels and deforestation, release large amounts of CO2 into the atmosphere. This excess CO2 is absorbed by the ocean, leading to ocean acidification.
Statement 2: It brings changes in species dominance, leading to ecosystem shifts in coastal waters.
This statement is also correct. Ocean acidification affects marine organisms, particularly those that rely on calcium carbonate to build their shells or skeletons. As the ocean becomes more acidic, it becomes more difficult for these organisms to form and maintain their calcium carbonate structures. This can lead to changes in species dominance, as certain organisms may be more resilient to acidification than others. This can result in shifts in ecosystem dynamics in coastal waters.
Statement 3: Ocean acidification leads to an increase in the pH of the ocean over an extended time.
This statement is incorrect. Ocean acidification actually leads to a decrease in pH, making the ocean more acidic. As CO2 is absorbed by the ocean, it reacts with water to form carbonic acid, which lowers the pH of the water.
In conclusion, statements 1 and 2 are correct, while statement 3 is incorrect. Ocean acidification is caused by the uptake of CO2 emitted by human activities, and it can lead to changes in species dominance and ecosystem shifts in coastal waters. However, it results in a decrease in the pH of the ocean, not an increase. Therefore, the correct answer is option A: 1, 2.
Statement 1: Ocean acidification is caused by uptake of carbon dioxide (CO2) emitted by human activities.
This statement is correct. Human activities, particularly the burning of fossil fuels and deforestation, release large amounts of CO2 into the atmosphere. This excess CO2 is absorbed by the ocean, leading to ocean acidification.
Statement 2: It brings changes in species dominance, leading to ecosystem shifts in coastal waters.
This statement is also correct. Ocean acidification affects marine organisms, particularly those that rely on calcium carbonate to build their shells or skeletons. As the ocean becomes more acidic, it becomes more difficult for these organisms to form and maintain their calcium carbonate structures. This can lead to changes in species dominance, as certain organisms may be more resilient to acidification than others. This can result in shifts in ecosystem dynamics in coastal waters.
Statement 3: Ocean acidification leads to an increase in the pH of the ocean over an extended time.
This statement is incorrect. Ocean acidification actually leads to a decrease in pH, making the ocean more acidic. As CO2 is absorbed by the ocean, it reacts with water to form carbonic acid, which lowers the pH of the water.
In conclusion, statements 1 and 2 are correct, while statement 3 is incorrect. Ocean acidification is caused by the uptake of CO2 emitted by human activities, and it can lead to changes in species dominance and ecosystem shifts in coastal waters. However, it results in a decrease in the pH of the ocean, not an increase. Therefore, the correct answer is option A: 1, 2.
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Community Answer
Consider the following statements regarding Ocean acidification. Ocean...
- Ocean acidity or ocean acidification is a reduction in the pH of the ocean over an extended time. It is caused by uptake of carbon dioxide (CO₂), a greenhouse gas emitted by human activities. The ocean’s average pH is now around 8.1, which is basic (or alkaline). But as the ocean continues to absorb more carbon dioxide, the pH decreases and the ocean becomes more acidic.
- This has contributed to the loss of corals on a global scale as their calcium skeletons are weakened by more acidic water. This also erodes and affects the formation of shells of shellfish.
- It has thus brought changes in relative species dominance, potentially leading to ecosystem shifts in coastal waters.
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Consider the following statements regarding Ocean acidification. Ocean acidification is caused by uptake of carbon dioxide (CO) emitted by human activities. It brings changes in species dominance, leading to ecosystem shifts in coastal waters. Ocean acidification leads to increase in the pH of the ocean over an extended time.Which of the above statements is/are correct?a)1, 2b)1, 3c)2, 3d)1, 2, 3Correct answer is option 'A'. Can you explain this answer?
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Consider the following statements regarding Ocean acidification. Ocean acidification is caused by uptake of carbon dioxide (CO) emitted by human activities. It brings changes in species dominance, leading to ecosystem shifts in coastal waters. Ocean acidification leads to increase in the pH of the ocean over an extended time.Which of the above statements is/are correct?a)1, 2b)1, 3c)2, 3d)1, 2, 3Correct answer is option 'A'. 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 Ocean acidification. Ocean acidification is caused by uptake of carbon dioxide (CO) emitted by human activities. It brings changes in species dominance, leading to ecosystem shifts in coastal waters. Ocean acidification leads to increase in the pH of the ocean over an extended time.Which of the above statements is/are correct?a)1, 2b)1, 3c)2, 3d)1, 2, 3Correct answer is option 'A'. 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 Ocean acidification. Ocean acidification is caused by uptake of carbon dioxide (CO) emitted by human activities. It brings changes in species dominance, leading to ecosystem shifts in coastal waters. Ocean acidification leads to increase in the pH of the ocean over an extended time.Which of the above statements is/are correct?a)1, 2b)1, 3c)2, 3d)1, 2, 3Correct answer is option 'A'. Can you explain this answer?.
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