For starters, algae are plants. Plants never use oxygen. Animals use oxygen in the process of respiration.
Decomposers use oxygen in the process of respiration when decomposing plants and animals including algae.
respiration
When Algae runs out of the proper nutrition it needs such as phosphates and other minerals it dies. Algae then dies and starts to decay during the decaying process Algae uses oxygen which is also why fish die from lack of oxygen. So to answer this question yes Algae does decay and consume oxygen.
Cyanobacteria or blue-algae are microbes that produce oxygen through the process of photosynthesis. Some scientists believe that these bacteria were the first to produce oxygen on Earth.
Oxygen is produced by green plants, including the algae in the ocean, but also trees, grass, etc. That is what we need, if we want to continue to have a supply of oxygen in the air, for us to breathe.
The organisms need plants, algae and bacteria for their nourishment. This ensures their survival.
Before there was oxygen life tended to exist in water as a form of algae which breathed in carbon dioxide and exhaled oxygen like plants. bacteria also existed at underwater thermal vents like the ones they have discovered at the ocean floor.
respiration
Algae, like all other plants, provides oxygen. All living things, including fish, need oxygen to survive. In the process of photosynthesis, the plant takes in carbon dioxide and gives off oxygen. Algae and all other plants are vital to the well being of the water ecosystem.
The lake will have heaps of plants and algae. they will then start dying and the "bodies" will rot which is a process that consumes oxygen, if too much organic mass rots it consumes all the oxygen in the water and everything in the lake dies- this process is called eutrification
Before the algae evolved, the oxygen % in the air was only a few%. After the algae, the % grew to over 20%. Which is why in the Carboniferous had giant plants and some large animals. Since then, the oxygen % of the air has diminished.
Algae , plants and trees generate Oxygen as a waste product through the process of photosynthesis ; see related link .
In the long run algae does.
Algae uses organic wastes in the water and produces oxygen. Plants produce oxygen after inhaling carbon dioxide.
Yes - through basic photosynthesis, like all other plants. What is remarkable about certain algae is their efficiency in doing so.
Animals get carbon by eating plants or algae or other animals that have eaten plants.
it blocks the sunlight from reaching the underwater plants and traps and blocks oxygen in the water, which is needed by aquamarine animals.
Oxygen is produced by plants and blue-green algae and consumed by burning and animals breathing.
plants and agae can manufacture their own food animals cannot