photoautotroph and photoheterotroph difference?

[Thonzo]

I cant see any real difference between photoautotrophs and photoheterotrophs, if im not mistakin they both obtain carbon from there invirment and recieve energy from the sun. I do know that the former uses Co2 and the latter uses other carbon based compounds but this difference seems mundane to me

any input would be greatly appreciated.

[gamar]

Photoautotrophs: Bacteria that use sunlight as their energy source and carbon dioxide (as part of photosynthesis) as their carbon source. These bacteria thus obtain all their nourishment through photosynthesis

Photoheterotrophs: Bacteria that use sunlight as their energy source and organic compounds from the environment as their carbon source.

[gamar]

There is a flowchart that summarizes these divisions here:

http://en.wikipedia.org/wiki/Autotroph

Good luck!