1. Decomposers: Bacteria and fungi are the primary decomposers. They break down the dead organism's tissues, releasing nutrients back into the ecosystem. This process can be influenced by the type of decomposer present, their abundance, and environmental conditions.

2. Scavengers: Animals like vultures, coyotes, and beetles consume the dead organism, breaking it down and dispersing its remains. The type of scavenger and their abundance can influence the rate and manner of decomposition.

3. Parasites: Some parasites can continue to live on or within a dead organism even after death. These parasites can alter the decomposition process and influence how the organism is ultimately broken down.

It's important to note that these biotic factors are often interconnected. For example, scavengers can spread bacteria and fungi while consuming a dead organism, further accelerating decomposition.