How does temperature affect dissolved oxygen?
Cooler water holds more dissolved oxygen than warmer water.
What is the relationship between BOD and DO?
High BOD leads to low DO, potentially creating hypoxic or anoxic conditions.
How do indicator species help monitor water quality?
Their presence or absence indicates the health of an ecosystem.
How do moving water and photosynthesis increase DO?
Moving water aerates the water, while photosynthesis releases oxygen.
Why is the Zone of Tolerance important?
It helps determine the ideal conditions for organisms to thrive.
What factors affect the Zone of Tolerance?
Factors like sunlight and pollutant levels.
How does respiration affect DO levels?
Respiration uses up DO, decreasing its concentration in the water.
How do nutrient levels affect water quality?
Excessive nutrients can lead to eutrophication and decreased DO.
What impacts water quality?
Recreation, drinking water, and fishing.
What is the relationship between BOD and DO?
High BOD leads to low DO, which is harmful to aquatic life.
How does temperature affect DO?
Cooler water holds more DO than warmer water.
What is the significance of indicator species?
Their presence or absence indicates ecosystem health and pollution levels.
Define Zone of Tolerance.
The range of conditions where an organism can survive and thrive.
What are indicator species?
Species sensitive to environmental changes, used to assess ecosystem health.
Define Dissolved Oxygen (DO).
The amount of oxygen present in water, crucial for aquatic life.
What is Biological Oxygen Demand (BOD)?
The amount of oxygen needed by organisms to break down organic waste.
Define hypoxic.
An environment with low oxygen levels.
Define anoxic.
An environment with no oxygen.
What is the Oxygen Sag Curve?
It shows how DO changes downstream from a pollution source.
