what happens in a photic part of a body of water ?

Answer 1

The word photic means referring to light. This the zone of a body of water that light can penetrate and photosynthesis can still occur. It usually starts at the surface and goes to a depth that is about 1% of the light intensity that is found at the surface.

Answer 2

The "photic zone" of a body of water refers to the depth portion where light is able to penetrate. As depth increases, the amount of light decreases exponentially. In the photic zone is where photosynthetic organisms (phytoplankton, micro and macro algae) are able to use light to drive photosynthesis. As a result, there is the highest amount of primary production (from photosynthesis) in the photic zone, and this zone is able to support the rest of the trophic pyramid (organisms that consume photosynthetic products, and those that eat them, etc)