Which organism MUST live in the photic zone of the ocean biome?
The organisms that obviously needs light, such as the photosynthetic ones. Example of these organisms are the Phytoplankton. An example of phytoplankton are the Microscopic algae, they are the base of any aquatic food chain, and they need to be on the photic zone (so they can absorb light) to produce organic matter through photosynthesis. The “Photic Zone” is the first “zone” in the aquatic biome, and it is characterized by the incidence of “light” (photons). Therefore, you can conclude that, “the organisms that MUST live in the Photic Zone” are the autotrophic organisms, however just the “photoheterotrophic” ones, because the “chemotrophic organisms” doesn’t necessarily need to be in the Photic Zone, once they produce organic matter through the absorption of inorganic matter, thus doesn’t depend on the presence of light. FCH.
