Which types of organic matter can be found in a stream?

Autochtonus sources: algee and macrophytes basicly. Allochtochtonus sources: coming from outside (leaves (CPOM), any big course particulate organic matter. Can alsoo be fine (FPOM) or dissolved (DOC). FPOM can also be FBOM (fine benthic organic matter) seston is suspended in the water. We seperate them cause they are food source for different organisms. DOM is the largest pool of organic carbon in the stream. A lot of it is very hard for microbes to decompose - they often have very complex organic molecules which is hard to use for microbes. Although its a very big pool its not the most important when we talk about food web. CPOM. - leaves, macrophytes and animal parts within and outside the stream. FPOM - breakdown of CPOM and also feeces of smaller organisms - the difference is just size. DOM - groundwater for instance.