Size dependence of growth and photosynthesis in diatoms: a synthesis

Geider, Richard J.; Piatt, T.; Raven, JA

doi:10.3354/meps030093

Cited by 190 publications

(140 citation statements)

References 55 publications

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“…Among other variables the maximum growth rate of microalgae is correlated with cell size; in general, smaller algae grow faster than larger ones (Geider et al 1986). Thus, the growth rate estimates of the relatively large diatoms which were present in the field and in the experimental containers were probably less than the growth rates of the pico-and nanoplankton cells (e.g.…”

Section: Resultsmentioning

confidence: 99%

Growth rates of Antarctic marine phytoplankton in the Weddell Sea

Spies¹

1987

Mar. Ecol. Prog. Ser.

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Natural microplankton from summer surface waters of the Weddell Sea was incubated in 10 1 Nalgene* flasks at -1 "C and irradiance 45 ~E i n s t n 1 2 s l . Ambient nutrient concentrations were high enough to support rapid biomass accun~ulation. Maximum growth rates and generation times of the dominant diatom assemblages were determined by successive cell counts. Growth rates ranged from 0.38 to 1.33 divisions d l and generation times varied from 18.0 to 63.2 h d i v i s i o n ' . Thus, rapid growth at low temperatures is possible; growth rates of Weddell Sea phytoplankton are comparable to those of temperate latitudes.

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Section: Resultsmentioning

confidence: 99%

Growth rates of Antarctic marine phytoplankton in the Weddell Sea

Spies¹

1987

Mar. Ecol. Prog. Ser.

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“…Like other forms of unicellular algae (e.g. diatoms (Geider et al, 1986)) there appears to exist a general size-dependent relationship, with smaller zooxanthellae types corresponding with higher MI (Wilkerson et al, 1988). This size-dependent MI relationship may relate to the cell size dependence of DNA content (LaJeunesse et al, 2005) and/or the cell size dependence of key metabolic rates (Fitt, 1985).…”

Section: The Enhanced Respiratory (R) Cost Resulting From a Large Nummentioning

confidence: 99%

Breakdown of the coral-algae symbiosis: towards formalising a linkage between warm-water bleaching thresholds and the growth rate of the intracellular zooxanthellae

Wooldridge

2013

Biogeosciences

130

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Impairment of the photosynthetic machinery of the algal endosymbiont ("zooxanthellae") is the proximal driver of the thermal breakdown of the coral-algae symbiosis ("coral bleaching"). Yet, the initial site of damage, and early dynamics of the impairment are still not well resolved. In this perspective essay, I consider further a recent hypothesis which proposes an energetic disruption to the carbon-concentrating mechanisms (CCMs) of the coral host, and the resultant onset of CO₂-limitation within the photosynthetic "dark reactions" as a unifying cellular mechanism. The hypothesis identifies the enhanced retention of photosynthetic carbon for zooxanthellae (re)growth following an initial irradiance-driven expulsion event as a strong contributing cause of the energetic disruption. If true, then it implies that the onset of the bleaching syndrome and setting of upper thermal bleaching limits are emergent attributes of the coral symbiosis that are ultimately underpinned by the characteristic growth profile of the intracellular zooxanthellae; which is known to depend not just on temperature, but also external (seawater) nutrient availability and zooxanthellae genotype. Here, I review this proposed bleaching linkage at a variety of observational scales, and find it to be parsimonious with the available evidence. Future experiments are suggested that can more formally test the linkage. If correct, the new cellular model delivers a valuable new perspective to consider the future prospects of the coral symbiosis in an era of rapid environmental change, including: (i) the underpinning mechanics (and biological significance) of observed changes in resident zooxanthellae genotypes, and (ii) the now crucial importance of reef water quality in co-determining thermal bleaching resistance

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“…A more pertinent question is at what time scales the condition of balanced growth might be met. In fact, acclimation from one light level to another will take place over a finite period, with Geider et al (1986) and Raven and Geider (2003) suggesting that the appropriate time scale for acclimation is of the order of hours to days, implying that balanced growth would hold on daily time scales. Moore et al (2003Moore et al ( , 2006 have provided examples where photoacclimation timescales were longer than those for surface mixing, and Talmy et al (2013) highlighted the importance of surface irradiance, depth of mixing, and light attenuation using a resource allocation based model of photoacclimation.…”

Section: Discussionmentioning

confidence: 99%

An Exact Solution For Modeling Photoacclimation of the Carbon-to-Chlorophyll Ratio in Phytoplankton

2017

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A widely-used theory of the photoacclimatory response in phytoplankton has, until now, been solved using a mathematical approximation that puts strong limitations on its applicability in natural conditions. We report an exact, analytic solution for the chlorophyll-to-carbon ratio as a function of the dimensionless irradiance (mixed layer irradiance normalized to the photoadaptation parameter for phytoplankton) that is applicable over the full range of irradiance occurring in natural conditions. Application of the exact solution for remote-sensing of phytoplankton carbon at large scales is illustrated using satellite-derived chlorophyll, surface irradiance data and mean photosynthesis-irradiance parameters for the season assigned to every pixel on the basis of ecological provinces. When the exact solution was compared with the approximate one at the global scale, for a particular month (May 2010), the results differed by at least 15% for about 70% of Northern Hemisphere pixels (analysis was performed during the northern hemisphere Spring bloom period) and by more than 50% for 24% of Northern Hemisphere pixels (approximate solution overestimates the carbon-to-chlorophyll ratio compared with the exact solution). Generally, the divergence between the two solutions increases with increasing available light, raising the question of the appropriate timescale for specifying the forcing irradiance in ecosystem models.

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Size dependence of growth and photosynthesis in diatoms: a synthesis

Cited by 190 publications

References 55 publications

Growth rates of Antarctic marine phytoplankton in the Weddell Sea

Growth rates of Antarctic marine phytoplankton in the Weddell Sea

Breakdown of the coral-algae symbiosis: towards formalising a linkage between warm-water bleaching thresholds and the growth rate of the intracellular zooxanthellae

An Exact Solution For Modeling Photoacclimation of the Carbon-to-Chlorophyll Ratio in Phytoplankton

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