How microorganisms can be harmful to the ecosystem and what will be the effect to the other organism in your food web if you remove one of the herbivores?
The primary harmful effects of microbes upon our existence and civilization are that they are an important cause of disease in animals and crop plants, and they are agents of spoilage and decomposition of our foods, textiles and dwellings. If herbivores are removed from a food chain then carnivores will starve and die and producers are also affected and may die due to competition for space and nutrients. It is not possible to remove a trophic level without causing damage to the ecosystem as they are interlinked.