There are more than 5 factors, but here are perhaps the most important ones: 1) Light: Light energy is a crucial component in photosynthesis, as it is the primary energy source of the process. 2) Carbon Dioxide: Another key ingredient in photosynthesis. 3) Temperature: There is an optimum temperature for photosynthesis that varies from organism to organism. Too cold or two hot, and rate of photosynthesis will be lower. 4) Water - Like almost all life process, water is a key component in photosynthesis. 5) Oxygen. A common misconception is that plants only "breathe in" carbon dioxide and expel oxygen. Plant cells actually require oxygen as well in order to function, and thus oxygen is a necessary part of photosynthesis.
Suspended silt diminishes the entrance of light into the water. This influences angle bolstering and tutoring hones and can lead to decreased survival.
