The likeliest factor why phytoplanktons are limited to the top ten feet in the seas and oceans is due to the dependence of such organisms on sunlight for their living and also manufacturing of food on their own.
Phytoplanktons are the microscopic, marine algae which are autotrophs in nature and are found under water. They are important sources of marine food and also serve as nutrient sources for the marine ecosystem. Phytoplankton are dependent on sunlight and their CO2-fixation activity, which makes it important for them to remain in the top layer of water streams where sunlight can penetrate, and exchange of oxygen and carbon dioxide can take place. Phytoplankton are important for humans in the medical field as they Supplement Lower Muscle Damage and Sustain Performance across Repeated Exercise Bouts.
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