An organism that feeds on dead organic matter is called a saporific or saprophyte. These organisms, including certain fungi and bacteria, play a crucial role in decomposition within an ecosystem. By breaking down deceased organisms, they recycle vital nutrients back into the environment, promoting soil fertility and health. This process not only helps maintain ecological balance but also supports the growth of new life. Their activities are essential for energy transfer in food webs, preventing the accumulation of dead matter and facilitating energy flow within ecosystems.