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Horizontal distribution and transport processes of bloom-forming Microcystis in a large shallow lake (Taihu, China) |
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| Authors: | Xiaodong Wu Fanxiang Kong Yuwei Chen Longjiang Zhang Min Zhang Peng Xing |
| Institution: | a National key Laboratory of Lake and Environment Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Beijing East Road #73, Nanjing 210008, PR China b Graduate School of Chinese Academy of Sciences, Beijing 100049, PR China c School of the Environment, Nanjing University, Nanjing 210039, PR China d Nanjing Institute of Environmental Sciences, State Environmental Protection Administration, Nanjing 210042, PR China |
| Abstract: | The horizontal distribution of bloom-forming Microcystis in a specific lake area and the transport of Microcystis by wind-driven lake currents between Meiliang Bay and the open water of Taihu Lake were measured during continuous field observations from August 21 to 25, 2006. During the observations, the horizontal distributions of Microcystis, represented by Chlorophyll a, showed a clear concentration toward downwind lake areas. According to the lake currents and the Chl a concentrations on the boundary line between the Meiliang Bay and the open water, the transported Chl a was less than 2% of the total weight of Chl a in Meiliang Bay on August 22, 24 and 25. The results suggest that the horizontal distribution of the bloom-forming Microcystis was strongly affected by the wind conditions, and the wind-driven Microcystis accumulation was mainly determined by surface drift; the transport of Microcystis by lake currents was much less important in this large, shallow lake. |
| Keywords: | Microcystis bloom Horizontal distribution Wind Lake currents Taihu Lake |
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