By and large it is the man-made pollutions of waters that get the most attention, and perhaps rightfully so. But what is also important is the overall contamination, or natural quality of water that will help determine the treatments necessary to make a water safe for public consumption.n example of a point source of water pollution is a pipe from an industrial facility discharging effluent directly into a river. An example of a nonpoint-source of water pollution is when fertilizer from a farm field is carried into a stream by rain (i.e. run-off).
Decomposers are consumers that obtain energy by feeding on and breaking down detritus. Detritus is the waste and remains of dead organisms. Animals that eat detritus are often called scavengers.They include earthworms, some rodents and insects, crayfish, catfish, and vultures.The main decomposers are bacteria and fungi.ecomposers are consumers that obtain energy by feeding on and breaking down detritus. Detritus is the waste and remains of dead organisms. Animals that eat detritus are often called scavengers.
While the scavengers act on the dead animals and plants, they break them in to small pieces of organic materials. Thus, scavengers start the decomposing process. In addition, big helpers for the decomposition process are the scavengers, while detritus feeders are the small helpers. Decomposer.