Question

Which of the following statements best describes the impact of climate change on fisheries?

• A. Climate change primarily affects fish populations in polar regions due to melting ice caps.
• B. Climate change has minimal impact on fisheries as fish populations can adapt rapidly to changing environmental conditions
• C. Climate change can disrupt marine ecosystems, affecting fish migration patterns, reproduction rates, and habitat suitability
• D. Climate change leads to an increase in fish populations worldwide, resulting in higher yields for fisheries.

Hint:

When answering conceptual questions on climate change, select options that describe systemic, ecological disruptions.
Avoid options that suggest narrow impacts or rapid biological adaptation.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Climate change alters ocean temperatures, salinity, currents, and pH (ocean acidification).
These environmental changes affect marine food webs and the biology of harvested fish species.

Step 2: Detailed Explanation:
Let us analyze the proposed impacts:
- Option (A) is too narrow, as climate change affects tropical and temperate marine ecosystems as well.
- Option (B) is incorrect because aquatic species have distinct physiological limits, and rapid changes can exceed their capacity to adapt.
- Option (D) is incorrect because climate change generally reduces maximum catch potential in many regions, particularly in the tropics.
- Option (C) is accurate. Warming waters shift the geographic distribution of fish species toward higher latitudes or deeper waters.
Changes in seasonal cues also disrupt spawning times, match-mismatch dynamics with planktonic food, and coral reef habitat suitability.

Step 3: Final Answer:
The best description of climate change's impact is that it disrupts marine ecosystems, affecting fish migration, reproduction, and habitat suitability.