You notice a farmer applying fertilizer on land adjacent to your favorite fishin

Question

You notice a farmer applying fertilizer on land adjacent to your favorite fishing spot. The same day it rains. You decide to go fishing a few days later when the weather is nicer. When you arrive, you notice many dead fish and a lot of algae. After reading Section 17.2B in your text, you conclude:

A. The rain must have been polluted

B. The fertilizer caused the fish to grow too fast, and the fish died naturally

C. The fertilizer caused the algae to grow, but the fish died naturally

D. The fertilizer caused the algae to grow, which depleted the amount of oxygen available, and caused the fish to suffocate

E. The fertilizer caused the algae to grow, which increased the amount of oxygen available, and fish can't tolerate increased oxygen levels

Explanation / Answer

D. The fertilizer caused the algae to grow, which depleted the amount of oxygen available, and caused the fish to suffocate

Due to the addition of the fertilizers lead to high growth of the algae, as algae die the organic matter is decomposed by the hetrotrophic microorganisms such as the bacteria leading to the decrease in the oxygen availability and caused fish to suffocate.

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