The oxygen level varies in different bodies of water because some bodies of water are warmer than others therefore,.. the more hot the less oxygen because the particles will begin to die as the water gets hotter but this is how it becomes a compressed gas ...
Water that has been exposed oxygen typically contains 2-3 millimole of oxygen.
there are may different types of bodies of water
Aquatic organisms need oxygen to survive
The water level gets disrupted. The level of water in water bodies get changed.
Hypoxia is a deficiency of oxygen in either the fish or water itself. Water naturally has a level of oxygen dissolved in itself. That is the oxygen that fish take in through the gills. This level of oxygen in clean pure water is about 8 ppm. In the summer more algae grows in the water due to favorable conditions. This algae consumes oxygen from the water. Also, in the summer the water temperature increases. Oxygen has a lower solubility in water as the temperature increases. Therefore the level of oxygen in the water will decrease slightly as the water temperature increases. These are just a few common reasons. Every water body is certainly different.
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Biochemical Oxygen Demand is the measure of the amount of oygen consumed by microorganisms in decomposing organic mattter in water bodies. BOD directly affects the amount of dissolved oxygen in water-bodies (i.e. rivers and streams). The greater the BOD, the more rapidly oxygen is depleted in the stream. SOURCE: Google.
Dissolved oxygen levels can decrease due to processes like respiration by aquatic organisms, decomposition of organic matter, and insufficient mixing of water. Pollution, high temperatures, and excessive plant growth can also lead to decreases in dissolved oxygen levels in water bodies.
Animals that breath water use gills to extract oxygen from the water and absorb it into the blood for distribution throughout their bodies.
it hydrates our bodies by supplying the blood with oxygen