M.jannaschii is an autotroph, meaning that it generates all its energy from inorganic substances.
From the theatlantic.com
These reduced carbon compounds can be used as an energy source by the autotroph and provide the energy in food consumed by heterotrophs.
From the en.wikipedia.org
I know that this applies mainly towards bacterial and viral genetics, but then again, nobody thought that an animal could become an autotroph, so who am I to discard a good theory?
From the newscientist.com
More examples
Autophyte: plant capable of synthesizing its own food from simple organic substances
An autotroph, also called a producer, is an organism that produces complex organic compounds (such as carbohydrates, fats, and proteins) from simple inorganic molecules using energy from light (by photosynthesis) or inorganic chemical reactions (chemosynthesis). ...
Autotrophy is the ability to be self-sustained by producing food from inorganic compounds. Some bacteria and some archaea have this ability. Inorganic compounds are oxidized directly without sunlight to yield energy. ...
Any organism that can synthesize its food from inorganic substances, using heat or light as a source of energy
(Autotrophs) Organisms capable of making all necessary food for survival from various raw materials. In plants, this occurs through the process of photosynthesis.
(Autotrophs) (producers) versus heterotrophs (consumers).
(autotrophs) microorganisms that use inorganic materials as sources of nutrients.
Any organism that is able to manufacture its own food. Most plants are autotrophs, as are many protists and bacteria. Autotrophs may be photoautotrophic, using light energy to manufacture food, or chemoautotrophic, using chemical energy.
An organism that is able to use carbon dioxide as a sole source of carbon.