By Waleewan Changprasert, Benjamaporn Rujit, Sutthawan Suphan and Sirikhae Pongswat


A study on the diversity of periphytic algae in Lotus Ponds in Lotus Museum, Rajamangala University of Technology Thanyaburi, Prathumthani Province, Thailand was carried out between November 2009 to April 2010. The periphytic algae samples were collected using a cylindrical syringe which set on the surface of submerge plants (e.g. Hydrilla verticillata (L.f.) Royle. and Nymphaea spp.). Ten ml. of suspension water were collected and repeated at 3 different locations in Lotus Pond. Light microscopy was used to identify the fresh and living material such as color and shape of chloroplast. Prepare samples for SEM micrograph by digestion in concentrated acid. The acid solution was removed by washing with distilled water and small drops of material were transferred onto the surface of slides. Twenty eight species of periphytic algae were found and could be classified into 3 divisions. The majority of the periphytic algae was diatom and classified in Division Bacillariophyta. Most of them were pennate diatoms e.g. Nitzschia spp., Navicula spp., Synedra spp. and Gomphonema spp. Followed by green algae in Division Chlorophyta e.g. Cosmarium spp., Euastrum spp. and Scenedesmus spp. and blue green algae in Division Cyanophyta e.g. Phormidium spp. and Oscillatoria spp.

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