Although the species involved vary greatly, most tropical rainforest food chains follow the same general pattern of producers, primary consumers, secondary consumers and decomposers. These food chains all begin with green plants that manufacture their own food through the process of photosynthesis. Called producers, these green plants serve as food for primary consumers, also known as herbivores. Carnivores, or secondary consumers, eat the primary consumers. Organisms called decomposers consume the secondary consumers after they die, which recycles the nutrients back into the soil, where plants can use them to begin the cycle again.