Scientists discovered that runoff from plant fertilizers can produce algal blooms that negatively affect ocean ecosystems. Which of the following options provides evidence of how algal bloom harm ocean ecosystems?

Question

Scientists discovered that runoff from plant fertilizers can produce algal blooms that negatively affect ocean ecosystems. Which of the following options provides evidence of how algal bloom harm ocean ecosystems?
A. Authorities warn the public not to let their dogs swim in water bodies with algal blooms since they could get sick from algae exposure.
B. Large algal blooms rapidly decompose, contributing to increased CO2 and low-oxygen water that can reduce fish habitats.
C. Excessive nutrients from fertilizer runoff increase the amount of plant and algae growth in water bodies.
D. Rainfall and irrigation can cause excess water to enter the soil, resulting in excess fertilizer runoff that ends up in the ocean.

GPT-4o mini · Answer

The option that provides evidence of how algal blooms harm ocean ecosystems is:

B. Large algal blooms rapidly decompose, contributing to increased CO2 and low-oxygen water that can reduce fish habitats.

This option directly describes the negative impact of algal blooms on ocean ecosystems, specifically how their decomposition affects oxygen levels and fish habitats.