The morphology and distribution of common diatoms in Guangzhou water areas

Objective To construct the map of common diatom in Guangzhou water areas,and analyze the distribution pattern.Methods Water samples were obtained from rivers and lakes and ponds in Guangzhou area.Samples were centrifuged to obtain the sediments and observed under microscope.The diatoms were photographed and determined for the concentration in the water samples and the total proportion of all diatoms.Results A total of 50 kinds of diatoms were detected from March 2010 to August.A map of distribution of common diatoms in the Guangzhou water areas was constructed.The diatom species and distribution of the water areas of the same origin showed significant differences.For water areas do not have strong current,diatom species and distribution in different sites also showed significant differences.The diatom species and distribution of the river sections affected by tides showed less difference.Conclusion The distributions of diatoms in the static waters are localized.Flowage of water or external disturbances is the main reason which made the distribution of diatoms in waters tends to be more even.