... suspended organisms, the plankton, such as phytoplankton (plants) and zooplankton (animals), and some consumers such as insects and fish Plankton are small organisms that can feed and reproduce ... Company, Inc Lentic Habitat 75 zones-littoral, limnetic, profundal, and benthic-are shown in Figure 7. 1 Each zone "provides a variety of ecological niches for different species of plant and animal ... damselflies, 'Ol~rnith, L., Ecology and Field Biology New York: Harper & Row, p 134, 1 974 R Io2~llen, D., Stream Ecology: Structure and Function o Running Waters London: Chapman & Hall, p 48, J f 1996...