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Colder water can hold more oxygen than warmer water.
No. There is more oxygen in deeper water.
Freshwater has more oxygen than salt water but oxygen is more solublein fresh water.
Oxygen is more soluble in fresh water than it is in sea water, therefore there is more dissolved oxygen in river water than sea water.
Cold water can hold more dissolved oxygen than hot water. This is because the solubility of oxygen in water decreases as the temperature increases. Therefore, cold water has the ability to hold more oxygen than hot water.
Oxygen is generally more soluble in fresh water compared to salt water. This is because the presence of salts in salt water reduces the solubility of gases like oxygen. Additionally, temperature and pressure also play a role in determining the solubility of oxygen in water.
Water
High surface area of the water The colder the water the more dissolved oxygen Running water will dissolve more oxygen
The warmer the water the less oxygen it can carry. The warmer the water the faster the cold blooded inhabitants metabolism is and the more demand there is for more oxygen. Many creatures that have evolved to survive/thrive in cool water may well find insufficient oxygen to enable them to survive under conditions that are too warm for them.
Oxygen.
Stream water typically has more oxygen because it flows constantly, allowing more oxygen from the air to dissolve into the water. In contrast, pond water is stagnant and can become depleted in oxygen over time due to limited exchange with the atmosphere.