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Distribution of carbohydrates species during summer bloom in Lake Chaohu |
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Abstract Surface water samples were collected from eleven sampling sites in Lake Chaohu in July 2010, Chlorophyll a, dissolved organic carbon, phosphorus, nitrogen, and various carbohydrates concentrations were analyzed. Nutrient levels were higher in the west than that in the east, but Chlorophyll a did not show the same pattern, implying that the distribution of phytoplankton was affected by other factors. Furthermore, the dissolved organic carbon concentration was related to nitrate concentration. On average, total dissolved carbohydrates was the predominant carbon species, accounting for 26% of the dissolved organic carbon, whereas dissolved polysaccharides and dissolved monosaccharides comprised 21% and 6%, respectively. No significant relationship was observed between Chlorphyll a, dissolved organic carbon and various carbohydrates, suggesting that the resource of dissolved organic carbon and carbohydrates was more than phytoplankton during cyanobacterial bloom in Lake Chaohu.
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Received: 16 May 2011
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