Nutrition needs Energy and Carbon!
Chemoheterotroph: C from organic, E from organicmost bacteria, decomposers and pathogens
Photoheterotroph: C from organic, E from lightpurple non-sulfur bacteria
Photoautotroph: C from CO2, E from lightphotosynthesis; cyanobacteriasulfur bacteria: use H2S instead of H2O, make sulfur
Chemoautotroph: C from CO2, E from inorganic nitrifyer: NH4+ ? NO2- ? NO3- for energydeep-sea: bacteria oxidize H2S from hydrothermal vents