Water Quality and Aquatic Life

The video discusses pollution, focusing on its impact on aquatic ecosystems. It explains how pollution decreases oxygen levels in water, affecting aquatic life and biological diversity. The concept of algal blooms, caused by excess fertilizers, is explored, highlighting their detrimental effects. The video also covers the use of biological indicators, particularly macroinvertebrates, to assess water quality and ecosystem health.

What is one major effect of pollution on water systems?

• Increase in water temperature

• Decrease in oxygen levels

• Increase in fish population

• Decrease in water clarity

What causes algal blooms in water systems?

• Excess sunlight

• High water flow

• Excess fertilizers

• Lack of fish

How do algal blooms affect aquatic life?

• Increase in fish size

• Decrease in water temperature

• Increase in water clarity

• Decrease in oxygen levels

What are biological indicators used for?

• Measuring water temperature

• Increasing fish population

• Indicating water quality

• Decreasing pollution levels

What are macroinvertebrates?

• Plants in water

• Small organisms without a backbone

• Large fish

• Birds near water bodies

Which of the following is a macroinvertebrate sensitive to good water quality?

• Leech

• Stonefly nymph

• Carp

• Catfish

What does the presence of worms in a water system indicate?

• Good water quality

• High fish population

• High oxygen levels

• Poor water quality

Which zone has the lowest oxygen concentration?

• Decomposition zone

• Growth zone

• Clean zone

• Septic zone

What is the main feature to distinguish between dragonfly, mayfly, and stonefly nymphs?

• Shape of the head

• Number of prongs at the back

• Color of the body

• Size of the wings

Which organism is not typically found in a clean water zone?

• Trout

• Perch

• Bass

• Leech