Eutrophication of larger shallow lakes, such as Taihu Lake in Jiangsu Province, Chaohu Lake in Anhui Province and Donghu Lake in Wuhan City of China has long been investigated, trophic status and phytoplankton compositions and its succession in these lakes were recognized basically. In contrast to the situation of large shallow lakes, a few attentions were paid to study the eutrophication and phytoplankton succession in urban small water bodies1. Small water bodies within large cities are constructed or reconstructed to enhance urban ecological qualities including landscape images, microclimate adjustment and so on. These water bodies are characterized by their small lake surface area (less than 30,000 m~2), shallower depth (1-3m), location within city and stable hydrodynamics. Investigations have demonstrated that biomass and primary production of phytoplankton were relatively high in some of these water bodies owing to increase in nutrients. In this paper we present the dynamic of phytoplankton and relate it to key aquatic habitat factors in an urban small water body.
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