A GENETIC MARKER TO SEPARATEEMILIANIA HUXLEYI(PRYMNESIOPHYCEAE) MORPHOTYPES1

Schroeder, Declan C.; Biggi, Gaia F.; Hall, Matthew J.; Davy, Joanne E.; Martínez, Joaquín Martínez; Richardson, Anthony J.; Malin, Gillian; Wilson, William H.

doi:10.1111/j.1529-8817.2005.04188.x

Cited by 66 publications

(79 citation statements)

References 25 publications

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“…Studies on E. huxleyi , which tend to show differing geographic and sometimes depth distributions (Van Bleijswijk et al 1991. Schroeder et al (2005) recently identified a genetic marker that confirmed the genetic basis for discrimination of these North Atlantic morphotypes.…”

Section: Discussionmentioning

confidence: 99%

Calcification morphotypes of the coccolithophorid Emiliania huxleyi in the Southern Ocean: changes in 2001 to 2006 compared to historical data

Cubillos¹,

Wright²,

Nash³

et al. 2007

Mar. Ecol. Prog. Ser.

142

172

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Section: Discussionmentioning

confidence: 99%

Calcification morphotypes of the coccolithophorid Emiliania huxleyi in the Southern Ocean: changes in 2001 to 2006 compared to historical data

Cubillos¹,

Wright²,

Nash³

et al. 2007

Mar. Ecol. Prog. Ser.

142

172

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show abstract

“…This inference has been supported by a range of culture experiment work, (e.g. Brand, 1982;Young and Westbroek, 1991), and molecular genetic studies (Schroeder et al, 2005;IglesiasRodríguez et al, 2006). It is now conventionally recognized that E. huxleyi includes at least five morphologically discrete varieties or sub-species (Young et al, 2003).…”

mentioning

confidence: 88%

From laboratory manipulations to Earth system models: scaling calcification impacts of ocean acidification

et al. 2009

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Abstract. The observed variation in the calcification responses of coccolithophores to changes in carbonate chemistry paints a highly incoherent picture, particularly for the most commonly cultured "species", Emiliania huxleyi. The disparity between magnitude and potentially even sign of the calcification change under simulated end-of-century ocean surface chemical changes (higher pCO 2 , lower pH and carbonate saturation), raises challenges to quantifying future carbon cycle impacts and feedbacks because it introduces significant uncertainty in parameterizations used for global models. Here we compile the results of coccolithophore carbonate chemistry manipulation experiments and review how ocean carbon cycle models have attempted to bridge the gap from experiments to global impacts. Although we can rule out methodological differences in how carbonate chemistry is altered as introducing an experimental bias, the absence of a consistent calcification response implies that model parameterizations based on small and differing subsets of experimental observations will lead to varying estimates for the global carbon cycle impacts of ocean acidification. We highlight two pertinent observations that might help: (1) the degree of coccolith calcification varies substantially, both between species and within species across different genotypes, and (2) the calcification response across mesocosm and shipboard incubations has so-far been found to be relatively consistent. By analogy to descriptions of plankton growth rate vs. temperature, such as the "Eppley curve", Correspondence to: A. Ridgwell (andy@seao2.org) which seek to encapsulate the net community response via progressive assemblage change rather than the response of any single species, we posit that progressive future ocean acidification may drive a transition in dominance from more to less heavily calcified coccolithophores. Assemblage shift may be more important to integrated community calcification response than species-specific response, highlighting the importance of whole community manipulation experiments to models in the absence of a complete physiological understanding of the underlying calcification process. However, on a century time-scale, regardless of the parameterization adopted, the atmospheric pCO 2 impact of ocean acidification is minor compared to other global carbon cycle feedbacks.

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“…In the search for a genetic basis for this phenotypic variation, studies involving multiple E. huxleyi culture clones using molecular techniques such as RAPD and microsatellites have shown ample evidence of interclonal genotypic variation within the E. huxleyi morpho-species (Medlin et al, 1996, Iglesias-Rodriguez et al, 2006. One study has correlated phenotypic and genotypic variation, identifying a putative genetic marker for distinguishing E. huxleyi morphotypes (Schroeder et al, 2005). Pseudo-cryptic species have been documented in several coccolithophore taxa, with molecular data supporting earlier morphological and geological evidence (Sáez et al, 2003), but for E. huxleyi the question of whether different phenotypes or genotypes represent reproductively isolated species or interbreeding populations within a species complex remains to be resolved.…”

Section: The Origin Of Strain-specific Responsesmentioning

confidence: 99%

Strain-specific responses of Emiliania huxleyi to changing seawater carbonate chemistry

et al. 2009

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Abstract. Four strains of the coccolithophore E. huxleyi (RCC1212, RCC1216, RCC1238, RCC1256) were grown in dilute batch culture at four CO 2 levels ranging from ∼200 µatm to ∼1200 µatm. Growth rate, particulate organic carbon content, and particulate inorganic carbon content were measured, and organic and inorganic carbon production calculated. The four strains did not show a uniform response to carbonate chemistry changes in any of the analysed parameters and none of the four strains displayed a response pattern previously described for this species. We conclude that the sensitivity of different strains of E. huxleyi to acidification differs substantially and that this likely has a genetic basis. We propose that this can explain apparently contradictory results reported in the literature.

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A GENETIC MARKER TO SEPARATEEMILIANIA HUXLEYI(PRYMNESIOPHYCEAE) MORPHOTYPES¹

Cited by 66 publications

References 25 publications

Calcification morphotypes of the coccolithophorid Emiliania huxleyi in the Southern Ocean: changes in 2001 to 2006 compared to historical data

Calcification morphotypes of the coccolithophorid Emiliania huxleyi in the Southern Ocean: changes in 2001 to 2006 compared to historical data

From laboratory manipulations to Earth system models: scaling calcification impacts of ocean acidification

Strain-specific responses of <i>Emiliania huxleyi</i> to changing seawater carbonate chemistry

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A GENETIC MARKER TO SEPARATEEMILIANIA HUXLEYI(PRYMNESIOPHYCEAE) MORPHOTYPES1

Cited by 66 publications

References 25 publications

Calcification morphotypes of the coccolithophorid Emiliania huxleyi in the Southern Ocean: changes in 2001 to 2006 compared to historical data

Calcification morphotypes of the coccolithophorid Emiliania huxleyi in the Southern Ocean: changes in 2001 to 2006 compared to historical data

From laboratory manipulations to Earth system models: scaling calcification impacts of ocean acidification

Strain-specific responses of &lt;i&gt;Emiliania huxleyi&lt;/i&gt; to changing seawater carbonate chemistry

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Product

Resources

About

A GENETIC MARKER TO SEPARATEEMILIANIA HUXLEYI(PRYMNESIOPHYCEAE) MORPHOTYPES¹

Strain-specific responses of <i>Emiliania huxleyi</i> to changing seawater carbonate chemistry