The study of periphyton diversity and macro-benthic faunas in the wetlands of upper Brahmaputra valley, Assam
Periphyton contributes a major share of food for many aquatic animals including fish. The study of periphyton communities has the added advantage in relation to the increasing eutrophication of aquatic environments as they are one of the best biological indicators of the water quality because of their tremendous adaptive qualities and universal distribution. The periphyton samples were collected by rock scrapings from different points every month. The data were finally pooled together to obtain a representative sample. The samples were thoroughly centrifuged to obtain the sediment biomass. It is then transferred to a measuring cylinder and made the volume of the sample to 100 ml. from this sample 1 ml was drawn and the counting was done with the aid of a Sedgwick Rafter plankton counting cell. For macrobenthic study sediment samples were collected monthly. The submerged plants were collected in plastic bags immerged in 4% formalin and identified by Needham et.al (1962) and Patil and Gouder (1989). Molluscan shells collected washed preserved and identified by Fernando (1963) and Patil and Gouder (1989).Diptera, Oligocheata, insect species, chironomidaes, gastropods, Pelecypoda etc. were found in the study areas. This paper deals with the study of periphyton and their relation with macrobenthic population from 2011 onwards.