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.
Most bacteria (a few species are photosynthetic) can't get energy from the sun or make food from CO2 and water. Bacteria are scavengers, microbial vultures.However they can't actually eat carcasses, the food must be first be degraded to small organic molecules by various enzymes, e.g. proteases, nucleases, lipases.ost bacteria (a few species are photosynthetic) can't get energy from the sun or make food from CO2 and water. Bacteria are scavengers, microbial vultures.