High biomass and production of picoplankton in a Chinese integrated fish culture pond |
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Authors: | Noriko Takamura Xue-Bao Zhu He-Quan Yang Lin Ye Fang Hong Taizo Miura |
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Institution: | (1) Environmental Biology Division, National Institute for Environmental Studies, 305 Tsukuba, Ibaraki, Japan;(2) Shanghai Fishery University, 334 Jungong Road, 200090 Shanghai, P. R. China;(3) Center for Ecological Research, Kyoto University, 502-01 Shimosakamota, Otsu, Japan |
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Abstract: | The phytoplankton dynamics of a Chinese integrated fish culture pond in the suburbs of Shanghai were studied in September and October 1989. The chlorophyll a concentration was high with a range of 62.5–127.3 µg l–1; however, daily net production of phytoplankton was relatively low, with a range of 0.53–1.94 gC m –2 d–1. Of the total phytoplankton biomass, 70–87% was composed of nanoplankton (<10 µm) and picoplankton, probably because of the selective feeding by phytoplanktivorous carp. In particular, the chlorophyll a concentration of picoplankton was 2.1 – 14.1 mg m –3, and its contribution to total phytoplankton production rate was high (18–68%). |
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Keywords: | picoplankton photosynthesis primary production cyprinids fish farm pond |
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