Eutrofización

Excess nutrients from agricultural fertilizers lead to excessive plant growth. Rainwater carries these nutrients into rivers and streams, causing rapid algae growth. This results in decreased oxygen levels, leading to the death of fish and other aquatic organisms. Consequently, dead zones are created where no species can survive.

What is the primary source of excess nutrients that lead to excessive plant growth?

• Household garbage

• Natural soil erosion

• Industrial waste

• Fertilizers used in agriculture

How do excess nutrients reach rivers and streams?

• Through underground water channels

• By being absorbed by plants

• Carried by rainwater

• Through animal waste

What is the immediate effect of nutrient runoff on aquatic environments?

• Rapid algae growth

• Decrease in water temperature

• Increase in fish population

• Increase in water clarity

What happens to oxygen levels when algae grow rapidly?

• Oxygen levels increase

• Oxygen levels remain the same

• Oxygen levels decrease

• Oxygen levels fluctuate

What are dead zones in aquatic environments?

• Places with clear water

• Zones where no species can survive

• Regions with abundant plant life

• Areas with high fish population