Producers are autotrophs, which can synthesize inorganic substances into organic substances, including light energy autotrophy and chemical energy synthesis autotrophy.

Nitrifying bacteria synthesize organic matter through chemical synthesis. Both laver and apple synthesize organic matter through photosynthesis.

Heterotrophs lives by ingesting ready-made organic matter.

Yeast heterotrophic bacteria

B fragrant mushroom heterotrophic bacteria

C lactic acid bacteria heterotrophic bacteria