Energy source ENergy source are those nutrients that provide the initial Energy or ray radiation energy for its living The spectrum of energy source can be dividedinto two types: chemical material(organic or inorganic)and irradiation energy Chemotrophs use chemicalmaterials and phototroph se irradiation energy.Energy source are those nutrients that provide the initial energy or ray radiation energy for its living. The spectrum of energy source can be divided into two types: chemical material(organic or inorganic) and irradiation energy. Chemotrophs use chemical materials and phototrophs use irradiation energy. Energy source