The decomposers in marine ecosystems break down dead organic matter and waste, like decomposers on land. They include bacteria and fungi as well as organisms such as marine worms, sea urchins, starfish, and sea cucumbers. What is the MOST likely reason that decomposers are not assigned their own trophic level and shown on a food pyramid? Group of answer choices Their niche is not as important to ecosystems. Their populations are too small to represent. They exist on every trophic level. They do not consume sources of energy.