Inderscience Publishers

Interspecific competition among Cyanophyta, Chlorophyta and Diatom in response to pulse supply of nitrate

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In summer, Cyanobacteria, Chlorococcalesa and Diatom occupy 99% of total phytoplankton biomass in Taihu Lake, China. Nitrogen plays an important role toward shaping that structure of phytoplankton. Three typical species were chosen to investigate the competing relationship among those three phylum by the nitrate dynamic experiments and supply experiments. Five growth parameters of Microcystis aeruginosa, Scenedesmus quadricauda and Cyclotella sp. in Monod, Droop models based on Tilmans' R* rule were calculated, respectively. The results obtained help in recognising actual waterbloom levels in lakes.

Keywords: interspecific competition, Cyanophyta, Chlorophyta, Diatom, nitrate nitrogen, phytoplankton biomass, China, water bloom levels, lakes, algal bloom

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