Why is dissolved oxygen important for ecosystem?

Dissolved oxygen (DO) is one of the most important indicators of water quality. It is essential for the survival of fish and other aquatic organisms. Oxygen dissolves in surface water due to the aerating action of winds. … When dissolved oxygen becomes too low, fish and other aquatic organisms cannot survive.

What does dissolved oxygen mean for an ecosystem?

Dissolved oxygen (DO) is the amount of oxygen that is present in water. Water bodies receive oxygen from the atmosphere and from aquatic plants. Running water, such as that of a swift moving stream, dissolves more oxygen than the still water of a pond or lake.

What is the importance of dissolved oxygen and carbon dioxide in nature?

In a lake, a good balance of oxygen and carbon dioxide is just as important. Dissolved oxygen, also called DO, is vital to the health of aquatic habitats. Plants and animals need oxygen to survive. A low level of oxygen in the water is a sign that the habitat is stressed or polluted.

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Why do you think oxygen dissolved in water is important for the survival of plants and animals?

Oxygen dissolved in water is important for the survival of aquatic plants and animals because unlike land animals aquatic plants and animals can’t breathe directly through air. So they survive by inhaling the oxygen dissolved in water.

Why is dissolved oxygen necessary in wastewater treatment?

Plants use aeration tanks to suspend microorganisms in wastewater. … Dissolved oxygen (DO) is added to the aeration basin to enhance the oxidation process by providing oxygen to aerobic microorganisms so they can successfully turn organic wastes into inorganic byproducts.

Is dissolved oxygen good or bad?

Adequate dissolved oxygen is necessary for good water quality. Oxygen is a necessary element to all forms of life. Natural stream purification processes require adequate oxygen levels in order to provide for aerobic life forms. As dissolved oxygen levels in water drop below 5.0 mg/l, aquatic life is put under stress.

What three things affect how much o2 can dissolve?


  • Aquatic life- animals living in water use up dissolved oxygen. …
  • Elevation- the amount of oxygen in elevation increases. …
  • Salinity (saltiness)- Salty water holds less oxygen than fresh water.
  • Temperature- cold water holds more dissolved oxygen than warm water.

What is the importance of air dissolved in water?

Just as we need air to breathe, aquatic organisms need dissolved oxygen to respire. It is necessary for the survival of fish, invertebrates, bacteria, and underwater plants. DO is also needed for the decomposition of organic matter.

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What happens when we dissolved oxygen in water?

When oxygen is dissolved in water it gets trapped in water molecules and helps in breathing for aquatic animals.

What is the importance of oxygen dissolved in water class 6?

Oxygen gas dissolves in water. The plants and animals which live in water use the oxygen dissolved in water for respiration. Thus, oxygen gas dissolved in water is very important for the survival of animals and plants that live in water.

Do you think oxygen is important why?

Explanation: Oxygen is important because it gives energy for our cells to work and not only the cells but also the cell organelles. By which the new systems of our brain and body gets opened our nerves which are blocked due to some reasons gets opened which helps faster blood circulation.

What is the importance of oxygen gas dissolved in water How is the carbon dioxide gas dissolved in water helpful to the plants which live in water?

Textbook solution

(i) Dissolved oxygen is most vital indicator of water quality. It is very important for the survival of aquatic species. (ii) Oxygen gas when dissolved in water the plants and animals utilizes the oxygen gas for respiration.

Do you think oxygen is important?

Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbes.

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