The Position of Bacteria and their Products in Food Webs

摘要: When examining a drop of pond water under the microscope, an observer may see in it different kinds bacteria, algae, protozoa, and even occasional invertebrates, such as rotifers, cladocerans, copepods, nematodes, turbellarians, others. The presence these very organisms together sample is not mere coincidence. They are members food web, which each organism, its secretions excretions, or dead remains represent for one more other assemblage.