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Growth and production of free-living heterotrophic nanoflagellates in a eutrophic lake – Lake Donghu, Wuhan, China

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Abstract

In situ growth of heterotrophic nanoflagellates (HNF) in Lake Donghu, a eutrophic shallow lake in mainland China, was studied from January 1999 to March 2000 using a modified Weisse protocol. The study results indicated that the growth rates of HNF showed pronounced seasonal variation (−0.37–1.25 d−1), reaching the maximum during spring to early summer. When the water temperature was higher than 25.5 °C, HNF growth was inversely proportional to water temperature. There was an effect by bacterial abundance and autotrophic picoplankton on HNF growth that depended on location. HNF biomass was the highest in late spring, and the HNF production ranged from −2.25 to 35.45 mg l−1 d−1 with mean of 3.17 mg l−1d−1. When considered in the context of biomass and production data for zooplankton in Lake Donghu, it was evident that HNF contributed significantly to the total zooplankton production in Lake Donghu. These in situ studies indicate that temperature and food supply are the major determinants of HNF abundance and productivity.

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  1. The Chinese Academy of Sciences, Institute of Hydrobiology, Wuhan, 430072, P. R. China

    Yufeng Zhao, Yuhe Yu, Weisong Feng & Yunfen Shen

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  1. Yufeng Zhao
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  2. Yuhe Yu
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Zhao, Y., Yu, Y., Feng, W. et al. Growth and production of free-living heterotrophic nanoflagellates in a eutrophic lake – Lake Donghu, Wuhan, China. Hydrobiologia 498, 85–95 (2003). https://doi.org/10.1023/A:1026239306120

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