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While it is possible for natural phenomena to create dead zones (low-oxygen areas) in water, the most common cause is nutrient-rich runoff from farmland. These nutrients are eaten by phytoplankton (algae), which metabolize oxygen. The algae reproduce out of control, using up most of the available oxygen in the water. When the algae itself dies off, its biomass is decomposed by bacteria that also metabolize oxygen, prolonging the effects of the bloom.
One of the more well-known such dead zones is in the Gulf of Mexico, at the mouth of the Mississippi river. It grows to several thousand square miles across each year.
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How can pollution affect the level of oxygen in water?
The concentration of oxygen in waters decreases.
What are some examples of marine habitats?
The Pressure increases with depth The oxygen concentration levels decreases with depth There is the action of waves. There is alternative rise and fall of sea water twice as day, or simply tide action.
When water temperature increases what will the dissolved oxygen content do?
The amount of dissolved oxygen decreases when water temperature increases. Warm water is unable to dissolve as much oxygen gas.
What is oxygen depletion?
When oxygen levels in water get low... When algae takes over a lake. The oxygen levels will get low.
What is dissolve oxygen?
Dissolved oxygen is the current amount of oxygen in the water. A certain amount of Dissolved Oxygen Is needed to keep the fish alive, if any of the dissolved oxygen decreases by either a little or a lot it can cause changes in the water, normally if the dissolved oxygen decreases so do the fish and aquatics life's life.
how does temperature affect the concentration of dissolved oxygen?
Temperature has a direct effect on the concentration of dissolved oxygen in water. As the temperature of the water increases, the solubility of oxygen decreases and the concentration of dissolved oxygen will decrease. Conversely, as the temperature of the water decreases, the solubility of oxygen increases and the concentration of dissolved oxygen will increase. Additionally, warmer water is generally less dense than colder water, resulting in less efficient oxygen transfer.
How does increase of CO2 levels affect photosynthesis?
Up to a point, an increase of the reactant Carbon dioxide will increase the production of oxygen (increase the rate of photosynthesis). However, it will eventually change the ratio of CO2 and water as the CO2 increases, and the production of oxygen will decrease, (or in other words, the rate of photosynthesis decreases). This is one of the reasons why an increase of CO2 levels in the atmosphere is dangerous, as oxygen levels will decrease.
What occurs if the dissolved oxygen of water decreases to zero?
only anaerobic(oxygen free) bacteria survives .
Are the oxygen levels same at different depths of water?
no the water levels those not stead the same
What's dissolved oxygen?
Dissolved oxygen is the current amount of oxygen in the water. A certain amount of Dissolved Oxygen Is needed to keep the fish alive, if any of the dissolved oxygen decreases by either a little or a lot it can cause changes in the water, normally if the dissolved oxygen decreases so do the fish and aquatics life's life.
When the water is evaporated the water level decreases?
The water decreases, because as it evaporates, hydrogen/oxygen is converted to a lighter than air gas which rises and reduces the mass of the water thereby reducing the amount of water.
What happens to the solubility of oxygen in a pond as the pond decreases temperature?
Oxygen solubility in water is strange and does not follow "normal" solubility rules along with many other gases. The solubility increases as temperature decreases.
