Pigmented nanoflagellates in the coastal western subtropical Pacific are important grazers on Synechococcus populations

Tsai, An‐Yi; Chiang, Kuo‐Ping; Chan, Ya‐Fan; Yang, Lin; Chang, Jeng Kuei

doi:10.1093/plankt/fbl058

Cited by 34 publications

(40 citation statements)

References 27 publications

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“…Furthermore, in a previous study in the same general area, ciliates removed only ~3% of the Synechococcus spp. production, despite high ingestion rates by individual ciliates (Tsai et al 2007). In that study, the grazing impact by PNF was 20 times that of ciliates, and PNF were clearly the key warm-season grazers of Synechococcus spp.…”

Section: Discussionmentioning

confidence: 67%

“…equivalents at our study site, evidence suggested that PNF were the main grazers of Synechococcus spp., and that HNF had little grazing impact on cyanobacteria in subtropical western Pacific coastal waters (Tsai et al 2007, Chan et al 2009). These authors hypothesized that while HNF are usually the main consumers of bacteria, the grazing impacts of HNF and PNF on bacteria are significantly different in subtropical western Pacific coastal waters.…”

Section: Introductionmentioning

confidence: 98%

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Importance of bacterivory by pigmented and heterotrophic nanoflagellates during the warm season in a subtropical western Pacific coastal ecosystem

Tsai¹,

Gong²,

Sanders³

et al. 2011

Aquat. Microb. Ecol.

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We investigated temporal variations in the effects of bacterivory by different sizes of heterotrophic nanoflagellates (HNF) and pigmented nanoflagellates (PNF) during a warm period (May to September) in oligotrophic coastal waters of the subtropical western Pacific. Short-term experiments with fluorescently labeled bacteria (FLB) demonstrated ingestion rates of 0.3 to 5.8 bacteria HNF -1 h -1 by HNF in the size range 3-6 µm -rates that were higher than observed for other sizes of HNF. Rates of ingestion by PNF ranged between 0.9 and 15.5 cells PNF -1 h -1, and, as for HNF, were greatest for PNF in the 3-6 µm size group. Nanoflagellates of size < 6 µm removed about 98% of the total amount of bacteria consumed. The 3-6 µm PNF, 2-3 µm HNF, and 3-6 µm HNF were major consumers in the nanoflagellate community and were responsible for an average of 52, 28 and 16% of the total consumption of bacteria, respectively. The smallest PNF (2-3 µm) consumed only about 2% of the total and were considered to be primarily autotrophic. Despite ingestion rates in the range of those reported elsewhere, the low abundance of nanoflagellates observed resulted in relatively low grazing impacts (<10% of bacterial standing stock). We found a significant negative correlation between PO 4 concentrations and ingestion rates of the 3-6 µm PNF, suggesting that the PNF ingestion rate increased under nutrient-deficient conditions.

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Section: Discussionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 98%

Importance of bacterivory by pigmented and heterotrophic nanoflagellates during the warm season in a subtropical western Pacific coastal ecosystem

Tsai¹,

Gong²,

Sanders³

et al. 2011

Aquat. Microb. Ecol.

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show abstract

“…Consequently, the observed decrease in the abundance of Synechococcus and Prochlorococcus during the present experiment might be due to micrograzing by nanoflagellates (Tsai et al 2007(Tsai et al , 2009) and ciliates (Christaki et al 1999). The fact that no significant relationship was found between Synechococcus abundance and their potential grazer could indicate additional factors that lowered the Synechococus abundance.…”

Section: Size Structurementioning

confidence: 58%

Effect of CO2, nutrients and light on coastal plankton. III. Trophic cascade, size structure and composition

Reul¹,

Muñoz²,

Bautista³

et al. 2014

Aquat. Biol.

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“…Bacterivory has been found to be an important mode of nutrition for heterotrophic flagellates (HF) and ciliates (Sherr & Sherr 1987, Sanders et al 1989, Callieri et al 2002, and numerous studies have also revealed the importance of mixotrophs as consumers of bacteria (e.g. Bird & Kalff 1986, Domaizon et al 2003, Tsai et al 2007.…”

Section: Abstract: Phagotrophy · Protists · Mixotrophic Algae · Grazmentioning

confidence: 99%

Grazing rates of protists in wetlands under contrasting light conditions due to floating plants

Izaguirre¹,

Sinistro²,

Schiaffino³

et al. 2012

Aquat. Microb. Ecol.

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Pigmented nanoflagellates in the coastal western subtropical Pacific are important grazers on Synechococcus populations

Cited by 34 publications

References 27 publications

Importance of bacterivory by pigmented and heterotrophic nanoflagellates during the warm season in a subtropical western Pacific coastal ecosystem

Importance of bacterivory by pigmented and heterotrophic nanoflagellates during the warm season in a subtropical western Pacific coastal ecosystem

Effect of CO2, nutrients and light on coastal plankton. III. Trophic cascade, size structure and composition

Grazing rates of protists in wetlands under contrasting light conditions due to floating plants

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