ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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breakdown all the dead material helping to return the balance of the ecosystem
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breakdown all the dead material, using lots of oxygen causing hypoxia.
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Detailed explanation-1: -Hypoxia occurs when algae and other organisms die from lack of oxygen and available nutrients. Hypoxia events often follow algal blooms. The cyanobacteria, algae, and phytoplankton sink to the seafloor, and are decomposed by bacteria.
Detailed explanation-2: -Excess nitrogen and phosphorus cause an overgrowth of algae in a short period of time, also called algae blooms. The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants. When the algae eventually dies, the oxygen in the water is consumed.
Detailed explanation-3: -The large growth can have major impacts on ecosystems by blocking sunlight, stealing nutrients, and depleting oxygen. The depletion of oxygen through nightly respiration and the decomposition of dead algae can lead to oxygen levels so low that it forces organisms such as fish to leave the area or die.
Detailed explanation-4: -Hypoxia is often associated with the overgrowth of certain species of algae, which can lead to oxygen depletion when they die, sink to the bottom, and decompose.
Detailed explanation-5: -Severe algal growth blocks light that is needed for plants, such as seagrasses, to grow. When the algae and seagrass die, they decay. In the process of decay, the oxygen in the water is used up and this leads to low levels of dissolved oxygen in the water.