Gerald Langer

Universitat Autònoma de Barcelona

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Co-Authors

Gernot Nehrke

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Jelle Bijma

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Silke Thoms

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Lennart de Nooijer

Royal Netherlands Institute for Sea Research

Ian Probert

Sorbonne Paris Cité

Patrizia Ziveri

Universitat Autònoma de Barcelona

Glen L. Wheeler

Marine Biological Association of the United Kingdom

Ulf Riebesell

GEOMAR Helmholtz Centre for Ocean Research Kiel

Björn Rost

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Nina Keul

Kiel University

Cooperative Institutions

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Marine Biological Association of the United Kingdom

Centre National de la Recherche Scientifique

University of Bremen

University of Cambridge

GEOMAR Helmholtz Centre for Ocean Research Kiel

University of Plymouth

Universitat Autònoma de Barcelona

University of Southampton

University of Bristol

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Effects of ocean acidification on the calcification of coccolithophores - Evidence from experimental studies

Gerald Langer Ian Probert Björn Rost Patrizia Ziveri

Ocean Acidification

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Citations (0)

Effect of elevated nitrate concentration on calcification in Emiliania huxleyi

Gerald Langer Ina Benner

Emiliania huxleyi

Coccolithophore

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Citations (16)

Alterungsverhalten von thermisch gespritztem FeSi2 zur Anwendung in thermoelektrischen Generatoren.

Katharina Schmidt E. Müller J. Schilz W.A. Kaysser Gerald Langer

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Seawater carbonate chemistry, growth rate and morphology of Calcidiscus leptoporus (RCC1135) during experiments, 2011

Gerald Langer Maya Bode

Morphology

10.1594/pangaea.763286

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The dissolution behavior of biogenic calcites in seawater and a possible role for magnesium and organic carbon

Marine Chemistry (2018)

Adam V. Subhas Nick E. Rollins William M. Berelson Jonathan Erez Patrizia Ziveri

Artificial seawater

Emiliania huxleyi

Saturation (graph theory)

Coccolith

10.1016/j.marchem.2018.08.001

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Citations (28)

Carbon and nitrogen fluxes in the marine coccolithophore Emiliania huxleyi grown under different nitrate concentrations

Journal of Experimental Marine Biology and Ecology (2010)

Athanasios Kaffes Silke Thoms Scarlett Trimborn Björn Rost Gerald Langer

Emiliania huxleyi

Coccolithophore

Total inorganic carbon

10.1016/j.jembe.2010.06.004

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Citations (42)

Temperature affects the morphology and calcification of <i>Emiliania huxleyi</i> strains

Anaid Rosas-Navarro Gerald Langer Patrizia Ziveri

Abstract. Three strains of E. huxleyi type A were grown under non-limiting nutrient and light conditions, at 10, 15, 20 and 25 °C. All three strains displayed similar growth rate versus temperature relationships, with an optimum at 20-25 °C. Elemental production (particulate inorganic carbon (PIC), particulate organic carbon (POC), total particulate nitrogen (TPN)), coccolith mass, coccolith size, and width of the tube elements cycle were positively correlated with temperature over the sub-optimum to optimum temperature range. The correlation between PIC production and coccolith mass/size supports the notion that coccolith mass can be used as a proxy for PIC production in sediment samples. Increasing PIC production was positively correlated with the percentage of incomplete coccoliths in one strain only. Generally, coccoliths were heavier when PIC production was higher. This shows that incompleteness of coccoliths is not due to time shortage at high PIC production. Sub-optimal growth temperatures lead to an increase in the percentage of malformed coccoliths in a strain-speciﬁc fashion. Since in total only six strains have been tested thus far, it is presently difﬁcult to say whether sub-optimal temperature is an important factor causing malformations in the ﬁeld. The most important parameter in biogeochemical terms, the PIC:POC, shows a minimum at optimum growth temperature in all investigated strains. This clariﬁes the ambiguous picture featuring in the literature.

Coccolith

Emiliania huxleyi

Biogeochemical Cycle

10.5194/bg-2015-591

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Citations (4)

Coccolithophore calcification response to marine pCO2 - where reality confronts models.

Journal of Nannoplankton Research (2004)

Markus Geisen Gerald Langer J. R. Young

Coccolithophore

Objectification

10.58998/jnr2103

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Citations (1)

Calcification response of Emiliania huxleyi to temperature and pH variations under calcitic and aragonitic sea conditions.

Journal of Nannoplankton Research (2024)

H. Wang Diana Ruiz‐Pino Silvia Gardin Ian Probert Gerald Langer

Emiliania huxleyi

Coccolithophore

Ocean Acidification

10.58998/3300

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Characterization of the molecular mechanisms of silicon uptake in coccolithophores

Environmental Microbiology (2022)

Sarah J. Ratcliffe Erin M. Meyer Charlotte E. Walker Michael Knight Heather M. McNair

Coccolithophores are an important group of calcifying marine phytoplankton. Although coccolithophores are not silicified, some species exhibit a requirement for Si in the calcification process. These species also possess a novel protein (SITL) that resembles the SIT family of Si transporters found in diatoms. However, the nature of Si transport in coccolithophores is not yet known, making it difficult to determine the wider role of Si in coccolithophore biology. Here, we show that coccolithophore SITLs act as Na+ -coupled Si transporters when expressed in heterologous systems and exhibit similar characteristics to diatom SITs. We find that CbSITL from Coccolithus braarudii is transcriptionally regulated by Si availability and is expressed in environmental coccolithophore populations. However, the Si requirement of C. braarudii and other coccolithophores is very low, with transport rates of exogenous Si below the level of detection in sensitive assays of Si transport. As coccoliths contain only low levels of Si, we propose that Si acts to support the calcification process, rather than forming a structural component of the coccolith itself. Si is therefore acting as a micronutrient in coccolithophores and natural populations are only likely to experience Si limitation in circumstances where dissolved silicon (DSi) is depleted to extreme levels.

Coccolithophore

Frustule

Coccolith

10.1111/1462-2920.16280

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Citations (3)