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UPSC 2011: In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the 1. decomposer microorganisms to the surface, 2. nutrients to the surface, 3. bottom-dwelling organisms to the surface. Which of the statements given above is/are correct?
(a)1 and 2
(b)2 only
(c)2 and 3
(d)3 only
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Not attemptedCorrect Answer: (b) 2 only
Coastal upwelling brings cold, nutrient-rich deep water to the sun-lit surface, fuelling algal blooms and making these belts among the most productive marine zones. It is the dissolved nutrients—not decomposer microbes or benthic animals—that are transported upward, so only statement 2 is correct. ([scribd.com](https://www.scribd.com/document/973547011/1-UPSC-2011?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2011 Environment & Ecology question?▼
The correct answer is option (b): 2 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Ecosystems & Ecology Concepts question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2011, GS Paper 1, as Question 22. It falls under Environment & Ecology > Ecosystems & Ecology Concepts.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Ecosystems & Ecology Concepts?▼
UPSC has asked 48 questions from Ecosystems & Ecology Concepts (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.