WHY DO DINOFLAGELLATES HAVE LOWER GROWTH RATES?<sup>1</sup>

Tang, Evonne P. Y.

doi:10.1111/j.0022-3646.1996.00080.x

Cited by 88 publications

(71 citation statements)

References 26 publications

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“…Growth rates of K. brevis in batch culture were generally low (0.1 to 0.4 d À1 ), consistent with other studies of growth in dinoflagellates (Raven & Beardall, 1981;Tang, 1996 The form of N available in the culture medium had no significant effect on the growth rate of K. brevis. Cells grew equally well on both organic (urea) and inorganic (nitrate and ammonium) N, showing that they are physiologically capable of using the major N forms present in agricultural runoff, atmospheric deposition, and other anthropogenic inputs.…”

Section: Discussionsupporting

confidence: 89%

Photopigment radiolabelling as a tool for determiningin situgrowth rates of the toxic dinoflagellateKarenia brevis(Dinophyceae)

Richardson

Pinckney

Walker

et al. 2006

European Journal of Phycology

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Determination of growth rates of harmful algae is critical to understanding bloom dynamics. However, we have few reliable methods of directly determining in situ growth rates on natural populations. One available method is photopigment radiolabelling, where C-specific growth rates are based on synthesis rates of chlorophylls and carotenoids using 14 C-bicarbonate as a tracer. Here, we examined radiolabelling of the biomarker pigment gyroxanthin-diester as a tool for determining in situ growth rates of the toxic dinoflagellate Karenia brevis. We also characterized growth responses of K. brevis to various nitrogenous (N) nutrient sources and the presence or absence of a natural plankton community (including grazers) at two irradiances. We found that gyroxanthin radiolabelling may be used successfully to determine C-specific growth rates of K. brevis during monospecific blooms. However, the approach may be of limited use in mixed assemblages when there is low Karenia biomass because low concentrations of gyroxanthin per cell and low turnover rates result in poor signal for the gyroxanthin pigment. Growth rates of K. brevis generally ranged between 0.1 and 0.4 d À1 . Cells in batch culture grew equally well on inorganic and organic forms of N, so they may be physiologically capable of using the major N forms present in agricultural run-off, atmospheric deposition, and other anthropogenic inputs. This has implications for the control of K. brevis blooms in nutrient-impacted coastal waters in that organic N inputs should be considered (along with inorganic N) in nutrient management strategies. Our highest C-specific growth rates (0.7 d À1 ) were measured in the presence of microzooplankton grazers, also indicating that the release of dissolved compounds may play a role in stimulating the growth of K. brevis in nature.

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Section: Discussionsupporting

confidence: 89%

Photopigment radiolabelling as a tool for determiningin situgrowth rates of the toxic dinoflagellateKarenia brevis(Dinophyceae)

Richardson

Pinckney

Walker

et al. 2006

European Journal of Phycology

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“…As with light-saturated growth rates, it is known that carbon/chlorophyll varies as a function of species composition (Tang 1997). Lidström (2009) examined phytoplankton community composition on samples collected in parallel with our rate measurements.…”

Section: Discussionmentioning

confidence: 99%

“…One major limitation is that the model provides no information about the light physiology of the phytoplankton and relies on the assumption that it does not change in any meaningful way over space or time. Yet, physiological condition can vary with phytoplankton species composition (Tang 1997), solar irradiance, water temperature (Geider et al 1986), nutrients (Falkowski and Raven 2002), contaminants (Cole and Cloern 1987), and probably other environmental variables.…”

Section: Introductionmentioning

confidence: 99%

Reevaluating the Generality of an Empirical Model for Light-Limited Primary Production in the San Francisco Estuary

Parker

Kimmerer

Lidström

2012

Estuaries and Coasts

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Depth-integrated primary production (ΣP, in grams of carbon per square meter per day) was measured using 14 C in the northern San Francisco Estuary (SFE) from March through August of 2006 and 2007. Determinations of ΣP were then used to calibrate a published light-utilization model that relates ΣP to a composite parameter of chlorophyll, solar irradiance, and photic zone depth. The resultant calibration coefficient, y, varied by a factor of nearly two between 2006 and 2007 and was lower than determined in previous calibrations for the estuary. The now chronically low chlorophyll concentrations in the SFE have resulted in lower predictive power of the lightutilization model. The variation in y was likely the result of interannual variation in phytoplankton assimilation number. These results suggest that using a single y may yield large errors in estimated estuarine production when applied overbroad spatial and temporal scales. Given the food-limited condition of the SFE, it appears that direct measurements of primary production are necessary for accurately characterizing the base of the estuarine food web.

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“…This lower growth rate reflects in the lower chlorophyll a to carbon ratio (Chl a : C) as speculated by Tang (1996). The growth rates of dinoflagellates rarely double one per day (Thomas and Carr, 1985).…”

Section: Discussionmentioning

confidence: 98%

Potentiality of benthic dinoflagellate cultures and screening of their bioactivities in Jeju Island, Korea

Shah¹,

Kalpa²,

Ju-Young³

et al. 2014

Afr. J. Biotechnol.

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WHY DO DINOFLAGELLATES HAVE LOWER GROWTH RATES?¹

Cited by 88 publications

References 26 publications

Photopigment radiolabelling as a tool for determiningin situgrowth rates of the toxic dinoflagellateKarenia brevis(Dinophyceae)

Photopigment radiolabelling as a tool for determiningin situgrowth rates of the toxic dinoflagellateKarenia brevis(Dinophyceae)

Reevaluating the Generality of an Empirical Model for Light-Limited Primary Production in the San Francisco Estuary

Potentiality of benthic dinoflagellate cultures and screening of their bioactivities in Jeju Island, Korea

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WHY DO DINOFLAGELLATES HAVE LOWER GROWTH RATES?1

Cited by 88 publications

References 26 publications

Photopigment radiolabelling as a tool for determiningin situgrowth rates of the toxic dinoflagellateKarenia brevis(Dinophyceae)

Photopigment radiolabelling as a tool for determiningin situgrowth rates of the toxic dinoflagellateKarenia brevis(Dinophyceae)

Reevaluating the Generality of an Empirical Model for Light-Limited Primary Production in the San Francisco Estuary

Potentiality of benthic dinoflagellate cultures and screening of their bioactivities in Jeju Island, Korea

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WHY DO DINOFLAGELLATES HAVE LOWER GROWTH RATES?¹