The effects of temperature on the bacterivory of nanoflagellates

Lu Jiachang; Li Jie; Lai Junxiang

doi:10.3969/j.issn.0253-4193.2019.06.008

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Lu Jiachang, Li Jie, Lai Junxiang. The effects of temperature on the bacterivory of nanoflagellates[J]. Haiyang Xuebao, 2019, 41(6): 85-92. doi: 10.3969/j.issn.0253-4193.2019.06.008

Citation:

Lu Jiachang, Li Jie, Lai Junxiang. The effects of temperature on the bacterivory of nanoflagellates[J]. Haiyang Xuebao, 2019, 41(6): 85-92. doi: 10.3969/j.issn.0253-4193.2019.06.008

Lu Jiachang, Li Jie, Lai Junxiang. The effects of temperature on the bacterivory of nanoflagellates[J]. Haiyang Xuebao, 2019, 41(6): 85-92. doi: 10.3969/j.issn.0253-4193.2019.06.008

Citation:

Lu Jiachang, Li Jie, Lai Junxiang. The effects of temperature on the bacterivory of nanoflagellates[J]. Haiyang Xuebao, 2019, 41(6): 85-92. doi: 10.3969/j.issn.0253-4193.2019.06.008

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The effects of temperature on the bacterivory of nanoflagellates

doi: 10.3969/j.issn.0253-4193.2019.06.008

1.
Guangxi Key Laboratory of Marine Environmental Science, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning 530007, China
2.
School of Marine Sciences, Guangxi University, Nanning 530004, China

Received Date: 2018-03-02
Rev Recd Date: 2018-06-19

Abstract

Abstract

In order to investigate the temperature effects on the bacterivory of nanoflagellates (NF), natural NF community was collected from the coastal water in Guangxi, China. The NF was cultured under different temperatures (14℃, 22℃, and 28℃), during which the variations of the bacteria and NF abundance were observed. Fluorescently labeled bacteria were used to trace the grazing of bacteria by NF, and the community consumption rate of NF was calculated. Moreover, the ingestion rates of bacteria were compared between the PNF of different sizes (<3 μm and 3-10 μm). The results indicate that the ingestion rates arranged from high to low are 3-10 μm PNF, HNF, and <3 μm PNF. The ingestion rate of HNF is less affected by temperature than PNF, and the ingestion by PNF peaks at 22℃. Interestingly, the PNFs of the two sizes respond differently to temperature changes. The high temperature promotes the ingestion rate of 3-10 μm PNF but inhibits the ingestion rate of <3 μm PNF. The low temperature inhibits the ingestion rate of 3-10 μm PNF, but the inhibition of low temperature on the grazing of <3 μm PNF is less than high temperature. The abundances of both 3-10 μm PNF and <3 μm PNF are lowest in high temperature, and community consumption rate is mostly contributed by abundance. Therefore, for community consumption rate, the high temperature reduces the consumption of PNF on bacteria.
- nanoflagellates,
- grazing rate,
- temperature,
- bacteria

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