Seasonal variations in phytoplankton growth and microzooplankton grazing in a temperate coastal embayment, Korea

Kim, Sun-Ju; Park, Myung Gil; Moon, Chang-Ho; Shin, Kyoungsoon; Chang, Man

doi:10.1016/j.ecss.2006.07.011

Cited by 34 publications

(26 citation statements)

References 41 publications

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“…6b), which agrees with data from previous studies [63,[68][69][70][71]. Gutiérrez-Rodríguez et al (2009) [72] suggested that the correlation can be largely affected by the model assumed in dilution experiments (k = μ − m) because errors in the estimates of μ and m are not independent.…”

Section: Coupling Between Microzooplankton and Phytoplankton In The Ssupporting

confidence: 87%

Does microzooplankton grazing contribute to the pico-phytoplankton dominance in subtropical and tropical oligotrophic waters?

Zhou

Tan

Huang

et al. 2015

Acta Ecologica Sinica

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Section: Coupling Between Microzooplankton and Phytoplankton In The Ssupporting

confidence: 87%

Does microzooplankton grazing contribute to the pico-phytoplankton dominance in subtropical and tropical oligotrophic waters?

Zhou

Tan

Huang

et al. 2015

Acta Ecologica Sinica

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“…This result has been observed in many studies using the dilution method in a variety of environments (Landry and Hassett 1982;Landry et al 1984;Paranjape 1987;Gifford 1988;Kamiyama 1994;Murrell and Hollibaugh, 1998;Kim et al 2007;York et al 2010). Non-significant grazing has been attributed to high variability in the method due to the small sample number used in the dilution series (Schmoker et al 2013).…”

Section: Discussionsupporting

confidence: 54%

Phytoplankton pigment specific growth and losses due to microzooplankton grazing in a northern Gulf of Mexico estuary during winter/fall

McGehee

Redalje

2016

GCR

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Microzooplankton dilution grazing experiments were carried out on 6 dates, over a 3 month period at 2 locations in the Bay of St.Louis, MS (BSL) to determine phytoplankton pigment specific growth rates under natural (µ 0 ) and replete (µ n ) nutrient conditions and microzooplankton grazing. We hypothesized that diatoms would be the largest portion of the phytoplankton composition due to the winter/fall season and that these organisms would have the highest growth/grazing rates. We suspected that river flow from the Jourdan River would adversely affect growth and grazing rates of all phytoplankton classes. Growth rates of 5 phytoplankton accessory pigments (peridinin, fucoxanthin, alloxanthin, zeaxanthin, chlorophyll b) were identified. Intrinsic growth rates (µ 0 ) were often zero or negative (range: -0.46 to 0.56/d) at the location nearest the Jourdan River, particularly for alloxanthin (e.g., cryptophytes) and peridinin (e.g., dinoflagellates). Significant grazing of chlorophyll a was observed on 3 of 6 dates while grazing on marker pigments was variable. The phytoplankton community appeared nutrient limited during all but one experiment (µ 0 <µ n ). Intrinsic growth and grazing rates were correlated (p < 0.05, Spearman Rank Order correlation). Peridinin and alloxanthin-based growth and grazing rates were positively correlated with salinity, suggesting a river influence on these 2 phytoplankton pigment classes. We conclude that in the BSL microzooplankton preferentially grazed on the phytoplankton class which had the highest intrinsic growth rate. We show that this is greatly affected by riverine input into the estuary and nutrient limitation.

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“…Many studies have found pronounced seasonality in the phytoplankton growth and microzooplankton grazing in temperate and high-latitude waters (e.g. Calbet et al, 2008;Kim et al, 2007;Lawrence and Menden-Deuer, 2012;Loebl and Beusekon, 2008). Nevertheless, there are few studies on the seasonality of the microzooplankton grazing in oligotrophic tropical waters.…”

Section: Seasonal Variations In Phytoplankton Growth and Microzooplanmentioning

confidence: 99%

Seasonal and size-dependent variations in the phytoplankton growth and microzooplankton grazing in the southern South China Sea under the influence of the East Asian monsoon

et al. 2015

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Abstract.To examine seasonal and size-dependent variations in the phytoplankton growth and microzooplankton grazing in oligotrophic tropical waters under the influence of seasonal reversing monsoon, dilution experiments were conducted during the summer of 2009 (21 May to 9 June) and winter 2010 (9 to 18 November) in the southern South China Sea (SSCS). The results showed that environmental variables, phytoplankton biomass, phytoplankton growth rate (µ), microzooplankton grazing rate (m), and correlationship (coupling) between the µ and m, rather than the microzooplankton grazing impact on phytoplankton (m/µ) significantly varied between the two seasons. Higher relative preference index (RPI) for the larger-sized (> 3 µm) phytoplankton than pico-phytoplankton (< 3 µm), indicating significant size-selective grazing by microzooplankton on the larger-sized phytoplankton, were also observed. The µ and m were significantly correlated with seawater salinity and temperature, and phytoplankton biomass, which indicated that salient seasonal variations in the phytoplankton growth and microzooplankton grazing in the SSCS were closely related to the environmental variables under the influence of the East Asian monsoon. We propose that intermittent arrivals of the northeast winter monsoon could lead to the low µ and m, and the decoupling between the µ and m in the SSCS, through influencing nutrient supply to the surface water, and inducing surface seawater salinity decrease. The low m/µ (< 50 % on average) indicates low remineralization of organic matter mediated by microzooplankton and mismatch between the µ and m, and thus probably accounts for part of the high vertical biogenic particle fluxes in the prevailing periods of the monsoons in the SSCS. The size-selective grazing suggests that microzooplankton grazing partially contributes to the pico-phytoplankton dominance in the oligotrophic tropical waters such as that of the SSCS.

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Seasonal variations in phytoplankton growth and microzooplankton grazing in a temperate coastal embayment, Korea

Cited by 34 publications

References 41 publications

Does microzooplankton grazing contribute to the pico-phytoplankton dominance in subtropical and tropical oligotrophic waters?

Does microzooplankton grazing contribute to the pico-phytoplankton dominance in subtropical and tropical oligotrophic waters?

Phytoplankton pigment specific growth and losses due to microzooplankton grazing in a northern Gulf of Mexico estuary during winter/fall

Seasonal and size-dependent variations in the phytoplankton growth and microzooplankton grazing in the southern South China Sea under the influence of the East Asian monsoon

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