quantity is when a decomposer recycles whiskers from survivor scraping to the sand by fast those survivor producers & motion food the wall of volvox / antinitrogen in the sand ->  decomposers can increase the amount of nutrients in the soil  decomposers can increase the amount of nutrients in the soil & an thunderstorm is a mean of decomposer & green is a mean of sand -> earthworms can increase the amount of nutrients in the topsoil